Makoto Kohda Tohoku University, Department of Materials ScienceAssociate Professor field of expertisespintronics Contact.makoto＠material.tohoku.ac.jp(Please change “@” to half-width characters.) Research activities and collaboration networkIntroduction in English and selected papers are here What’s new December 2020 I was awarded the 14th Aoba Foundation for the Promotion of Engineering Award. I have received this award for our research on the establishment of new spin control principles in semiconductors and long range spin transport. Thank you very much for this award. June 2020 When the spin relaxation time depends on the crystal orientation, there is an anisotropy in the spin relaxation. This anisotropy has been considered to be an intrinsic value because of spin-orbit coupling, but we have shown for the first time that it can be controlled. The control of the spin-relaxation anisotropy revealed for III-V semiconductors may also appear in topological materials, oxides and atomic layer materials.“Control of Spin Relaxation Anisotropy by Spin-Orbit-Coupled Diffusive Spin Motion”, Daisuke Iizasa, Asuka Aoki, Takahito Saito, Junsaku Nitta, Gian Salis, Makoto Kohda, arXiv:2006.08253. June 2020 The permanent spin-turning state is one of the most effective methods for suppressing spin relaxation in III-V semiconductors, and we theoretically identified the crystal orientation where this state is most stable. We have shown that the 225 surface, which has not been studied at all, is the most stable. This paper has been selected as an Editor’s Suggestion by PRB.“Enhanced longevity of the spin helix in low-symmetry quantum wells”, Daisuke Iizasa, Makoto Kohda, Ulrich Zulicke, Junsaku Nitta, Michael Kammermeier, Physical Review B,101,(2020), 245417. Press Release(Tohoku University). Press Release(Graduate School of Engineering). Press Release(Materials). Press Release(FRiD). radio wave newspaper Press Release in English. EurekAlert. Nikkan Kogyo Shimbun . March 2020 A paper on spin control using spin-orbit locking has been selected as one of the Top 100 Downloaded Papers in Physics in Scientific Reports for 2019. This is the first time that spin-orbit locking, which exists at various material interfaces, has been used for spin control. If you are interested in this article, please see it.Top 100 in Physics 2019 Scientific Reports,9,(2019),1909. March 2020 I was awarded the Achievement Award of the Japan Institute of Metals. I received the award for my research on the electrical control of spin-magnetization by using spin-orbit interaction. Thank you. October 2019 We have shown that the spin-orbit interaction can be obtained from spin diffusion even in the transient region before the formation of the spin wave. This is a joint research with Associate Professor Morita of Chiba University. We found that the spin diffusion phenomenon works universally in both the spin-wave excited micro region and the plane-wave excited macro region. “Transient diffusive spin dynamics in intrinsic InGaAs/InAlAs multiple quantum wells” K. Kawaguchi, T. Fukasawa, I. Takazawa, H. Shida, Y. Saito, D. Iizasa, T. Saito, T. Kitada, Y. Ishitani, M. Kohda, and K. Morita Applied Physics Letters,115,(2019),172406. July 2019 The effects of diffusion and drift motions on spin precession are studied. The effective magnetic field generated by spin-orbit interactions can be evaluated with high precision. We have successfully separated the spin precession governed by diffusion and drift motions in GaAs quantum wells. Both motions produce an effective magnetic field, and we were able to clarify the difference between them. “Simultaneous evaluation of drift- and diffusion-induced spin-orbit fields in a (001) GaAs/AlGaAs two-dimensional electron gas” T. Saito, A. Aoki, J. Nitta, and M. Kohda Applied Physics Letters,115,(2019),052402. May 2019 Simultaneous control of valley polarization and valley coherence in single layer MoS2 This is a fundamental technology for valley quantum information. We have optically detected the polarization and coherence production of K and K’ valleys in transition metal chalcogenide MoS2. We have shown that valley polarization and valley coherence, which are important elemental techniques corresponding to spin polarization and spin coherence, can be generated optically in order to freely control the valley degrees of freedom. This is an important step towards optical valence quantum information. “Detection of both optical polarization and coherence transfers to excitonic valley states in CVD-grown monolayer MoS2” E. Asakura, M. Suzuki, S. Karube, J. Nitta, K. Nagashio and M. Kohda Applied Physics Express,12,(2019),063005. February 2019 We have realized a highly efficient spin control method in semiconductors. We have established a new method of spin-orbit locking for spin control. We have demonstrated a new principle that enables efficient spin control while suppressing spin relaxation. By using spin-orbit locking, the electron spins can be controlled while always being aligned in the direction of the effective magnetic field, which suppresses spin relaxation and is expected to make a significant contribution to quantum information and spintronics. “Spin-momentum locked spin manipulation in a two-dimensional Rashba system” M. Kohda, T. Okayasu and J. Nitta Scientific Reports,9,(2019),1909. December 2018 I was awarded the RIEC Award Tohoku University Researcher of the Year. I received this award for my research on electrical spin generation and spin relaxation suppression in semiconductor quantum structures. Thank you very much for this award. December 2018 (001) and (110) quantum wells, revealing the essential difference between the permanent spin-swirl states that can be realized in quantum wells Both (001) and (110) quantum wells can achieve permanent spin-turning states, although they have different surface orientations. However, we found that the lifetimes of the permanent spin-swirl states are significantly different due to the difference in the higher-order symmetry of the Dresselhaus spin-orbit interaction.。 “Robustness of a persistent spin helix against a cubic Dresselhaus field in (001) and (110) oriented two-dimensional electron gases” D Iizasa, D. Sato, K. Morita, J. Nitta, and M. Kohda, Physical Review B,98,(2018),165112. July 2018 I was the recipient of the 17th Intelligent Cosmos Incentive Award. I received this award for my research on electrical spin generation and long range spin transport in semiconductor quantum structures. Thank you very much for this award. April 2018 I was awarded the Young Scientist Award by the Ministry of Education, Culture, Sports, Science and Technology. I received this award for my research on spin production and spin transport using spin-orbit interaction. Thank you very much. January 2018 We published a paper on spin-orbit coupling and waveguide effects in layered GaSe. We have published two papers on the evaluation of spin-orbit coupling in GaSe and the waveguide effect in layered materials. “Weak antilocalization induced by Rashba spin-orbit interaction in layered III-VI compound semiconductor GaSe thin films” S. Takasuna, J. Shiogai, S. Matsuzaka, M. Kohda, Y. Oyama,and J. Nitta Physical Review B Rapid Communications,96,(2017),161303(R). “Effect of optical waveguide on photoluminescence polarization in layered material GaSe with millimeter scale” M. Suzuki, M. Kohda, S. Takasuna, S. Matsuzaka, Y. Sato, T. Tanabe, Y. Oyama,and J. Nitta Japanese Journal of Applied Physics,57,(2018),020308. July 2017 We have published a review paper on permanent spin swivel states. We summarize our previous studies on spin-orbit interactions and permanent spin rotation in semiconductors. I have written the derivation of the equation and its physical meaning so that beginners can understand it as much as possible, so I hope you will find it useful. “Physics and application of persistent spin helix state in semiconductor heterostructures” M. Kohda and G. Salis Semiconductor Science and Technology,32,(2017),073002. (doi.org/10.1088/1361-6641/aa5dd6) August 2016 We elucidated the spin relaxation mechanism of epitaxial Pt films. We have shown for the first time that the spin relaxation in epitaxial Pt films is a Dyakonov-Perel mechanism, similar to that in semiconductors. This means that electrical spin control is possible even in extremely thin metal films. “Observation of the D’yakonov-Perel’ spin relaxation in single-crystalline Pt thin films” J-C. Ryu, M. Kohda, and J. Nitta Physical Review Letters,116,(2016), 256802-1-256802-6. (doi:10.1103/PhysRevLett.116.256802) July 2016 Drift spin transport in a permanent spin-turn state was realized. In the permanent spin-swirl state, the spin relaxation is suppressed and the electric field can transport spins down to 100 microns or more. The interest of the perpetual spin-swirl state, protected by internal symmetry, could be used for device applications. “Drift transport of helical spin coherence with tailored spin-orbit interactions” Y. Kunihashi, H. Sanada, H. Gotoh, K. Onomitsu, M. Kohda, J. Nitta, and T. Sogawa Nature Communications,7,(2016),10722. (doi:10.1038/ncomms10722) June 2016 InGaAs quantum wells have been used to electrically control the perpetual spin rotation state and vice versa. The permanent spin-swivel state is an interesting state that allows us to realize both spin control and long-range spin transport at the same time. We can expect to realize a spin logic circuit by controlling gates in the permanent spin rotation state and its opposite state. “Gate-controlled switching between persistent and inverse persistent spin helix states” K. Yoshizumi, A. Sasaki, M. Kohda, and J. Nitta Applied Physics Letters,108,(2016),132402-1-132402-4. (doi:10.1063/1.4944931) May 2016 We have established a method to determine the bulk Dresselhaus spin-orbit interaction coefficient from the difference between the spin precession in the drift and diffusion motions. The electron spins feel different effective magnetic fields in drift and diffusion motions. By making good use of this, it is possible to obtain the bulk Dresselhaus spin-orbit interaction coefficient. “Current-Controlled Spin Precession of Quasistationary Electrons in a Cubic Spin-Orbit Field” P Altmann, F. G. G. Hernandez, G. J. Ferreira, M. Kohda, C. Reichl, W. Wegscheider, and G. Salis Physical Review Letters 116, 196802-1-196802-4 (2016). (doi: 10.1103/PhysRevLett.116.196802) December 2015 We have realized a helical spin structure in a semiconductor by using quasi-one-dimensional confinement effects. Time- and space-resolved Kerr measurements in the fine line structure show that as the lateral confinement effect increases, the helical spin structure appears and the spin relaxation time increases. “Transition of a two-dimensional spin mode to a helical state by lateral confinement” P.Altmann, M. Kohda, C. Reichl, W. Wegscheider, and G. Salis. Physical Review B92, 235304-1-235304-6 (2015). (DOI:10.1103/PhysRevB.92.235304) October 2015 We have established a method to evaluate two types of spin-orbit interactions separately using the diffusion of electrons. We have succeeded in determining the coefficients of Rashba and Dresselhaus spin-orbit coupling by means of sensitive optical detection of the effective magnetic field associated with the diffusion of electrons using time- and space-resolved Kerr measurements, summarizing our work at IBM Zurich Research Laboratory. “All-optical evaluation of spin-orbit interaction based on diffusive spin motion in a two-dimensional electron gas” M. Kohda, P Altmann, D. Schuh, S. D. Ganichev, W. Wegscheider, and G. Salis Applied Physics Letters 107, 172402 (2015). (doi: 10.1063/1.4934671) May 2014 – March 2015 I have studied time-resolved spin measurement at IBM Zurich Laboratory. We have been studying spin-orbit interaction by optical measurements using time-resolved Kerr measurements. In the future, we would like to develop the study of spin-orbit interaction by combining magnetic conductivity measurements and optical measurements. July 2014 We have made it possible to electrically detect the magnitude of the interaction between two types of spin orbitals using a semiconductor wire structure. When an in-plane magnetic field is applied to the wire and the direction of the in-plane magnetic field and the effective magnetic field coincide, an anisotropy in the spin relaxation time appears between the two directions. The direction of the effective magnetic field can be detected by detecting the anisotropy as magnetic conduction. A. Sasaki, S. Nonaka, Y. Kunihashi, M. Kohda, T. Bauernfeind, T. Dollinger, K. Richter, and J. Nitta. “Direct determination of spin-orbit interaction coefficients and realization of the persistent spin helix symmetry”, Nature Nanotechnology 13, 703-709 (2014).DOI: 10.1038/NNANO.2014.128 March 2014 I was awarded the Honda Memorial Research Encouragement Award by the Honda Memorial Foundation. The reason for the award is his research on electrical spin generation and control in semiconductors using spin-orbit interaction. March 2014 An article on the Journal of the Japan Society of Applied Physics Vol. 83 “Spintronics in the Future” was published. Co-authored with Dr. Haruki Sanada, Senior Research Fellow at NTT Basic Research Laboratories, on spin filters and electron spin resonance in semiconductors. October 2013 A special issue on “Recent Topics in Narrow Gap Semiconductors and Silicon Spintronics” was published in the Journal of the Magnetics Society of Japan, Magne Vol. 8. This is an article on gate control in the permanent spin swirling state in semiconductors. June 2013 The article on spin production using spin-orbit interaction was published in the June issue of Solid State Physics. This is a clear explanation of the research that realized the Stern-Gerlach experiment in solids. Some of the illustrations in this book are on the cover. This is a joint research with Kyoto University, Toho University, and NTT. April 2013 We have succeeded in growing perpendicularly magnetized FePd epitaxially on GaAs and InP substrates, which are widely used in semiconductors. The magnetic properties of L10-FePd/MgO change significantly between InP and GaAs substrates because of the different distortions it undergoes. The results were obtained in a joint research with Ando Laboratory, Department of Applied Physics, Tohoku University.“Structural and magentic properties of L10-FePd/MgO films on GaAs and InP lattice mismatched substrates” M. Kohda, S. Iimori, R. Ohsugi, H. Naganuma, T. Miyazaki, Y. Ando and J. Nitta Appl. Phys. Lett. 102, 102411(2013) 2013年1月 A presentation on the use of quantum point contacts to generate spin-polarized currents has been uploaded to Youtube. Presentation at the Topical workshop on semiconductor spintronics at Keio University on January 24, 2013. To view it, click here. August 2012 We were the first to succeed in aligning the spins of electrons without the use of ferromagnets or external magnetic fields. We have achieved the Stern-Gerlach spin separation experiment in semiconductors. “Spin-orbit induced electronic spin separation in semiconductor nanostructures” Makoto Kohda, Shuji Nakamura, Yoshitaka Nishihara, Kensuke Kobayashi, Teruo Ono, Jun-ichiro Ohe, Yasuhiro Tokura, Taiki Mineno, and Junsaku Nitta. Nature Communications 3, 1082 (2012). (doi:10.1038/ncomms2080) Click here for the press release. Using the spatial gradient of the effective magnetic field due to spin-orbit interactions, we have succeeded in separating upward and downward spins spatially and extracting only one of them (as shown in the figure below). August 2012 We have succeeded in controlling the gate electric field in the electron spin permanent rotation state. Since the effective magnetic field is uniaxial, the electron spin relaxation can be completely suppressed. “Gate-controlled persistent spin helix state in (In,Ga)As quantum wells” M. Kohda, V. Lechner, Y. Kunihashi, T. Dollinger, P. Olbrich, C. Schonhuber, V. V. Bel’kov,L. E. Golub,D. Weiss,K. Richter,J. Nitta,and S. D. Ganichev. PHYSICAL REVIEW B 86,081306(R) (2012). Click here for the press release. In the spin-permanent spin state, even if the electrons are randomly scattered from each other, the spins are always in phase with each other and propagate spatially (as shown in the figure below). So the spin relaxation can be suppressed. We have designed and actually realized a very large Rashba spin-orbit interaction in the InGaAsP/InGaAs two-dimensional electron gas. This is the largest value of Rashba spin-orbit interaction observed so far, obtained from weak anti-localization analysis (WAL). “Enhancement of Spin-Orbit Interaction and the Effect of Interface Diffusion in Quaternary InGaAsP/InGaAs heterostructures” M. Kohda and J.Nitta Physical Review B. 81, (2010) 115118.(DOI: 10.1103/PhysRevB.81.115118) A paper describing the spin-orbit interaction as a function of quantum well width and spin interference effects has been published in Special topics in JPSJ. “Manipulating spin orbit interaction in semiconductors.” M. Kohda, T. Bergsten, and J. Nitta Journal of the Physics Society of Japan, 77(3), (2008), 031008-1-031008-9 Published Papers [109] Intravalley Scattering Probed by Excitation Energy Dependence of Valley Polarization in Monolayer MoS2 Eito Asakura, Takeshi Odagawa, Masaki Suzuki, Shutaro Karube, Junsaku Nitta and Makoto Kohda [Journal of Physics D: Applied Physics, XX, (2021), accepted.] [108] Room-temperature spin?orbit magnetic fields in slightly misoriented (110) InGaAs/InAlAs multiple quantum wells Koichi Nakanishi, Ayuki Arikawa, Yasuhito Saito, Daisuke Iizasa, Satoshi Iba, Yuzo Ohno, Nobuhide Yokota, Makoto Kohda, Yoshihiro Ishitani, and Ken Morita [Applied Physics Letters,119,(2021), 032405.] [107] Distinguishing persistent effects in an undoped GaAs/AlGaAs quantum well by top-gate-dependent illumination Takafumi Fujita, Ryota Hayashi, Makoto Kohda, Julian Ritzmann, Arne Ludwig, Junsaku Nitta, Andreas D. Wieck, and Akira Oiwa [Journal of Applied Physics 129, 234301 (2021).] [106] Full spin-orbit coefficient in III-V semiconductor wires based on the anisotropy of weak localization under in-plane magnetic field Toshimichi Nishimura, Kohei Yoshizumi, Takahito Saito, Daisuke Iizasa, Junsaku Nitta, and Makoto Kohda [Physical Review B 103, 094412 (2021).] [105] Origin of spin?orbit torque in single-layer CoFeB investigated via in-plane harmonic Hall measurements Ye Du, Ryan Thompson, Makoto Kohda, and Junsaku Nitta [AIP Advances 11, 025033(2021).] [104] Anisotropic Spin-Orbit Torque through Crystal-Orientation Engineering in Epitaxial Pt Ryan Thompson, Jeongchun Ryu, Gaeun Choi, Shutaro Karube, Makoto Kohda, Junsaku Nitta, and Byong-Guk Park [PHYSICAL REVIEW APPLIED 15, 014055 (2021).] [103] Control of spin relaxation anisotropy by spin-orbit-coupled diffusive spin motion Daisuke Iizasa, Asuka Aoki, Takahito Saito, Junsaku Nitta, Gian Salis, and Makoto Kohda [PHYSICAL REVIEW B 103, 024427 (2021).] [102] Room-temperature perpendicular magnetic anisotropy of Pt/Co/AlOx trilayers on SrTiO3 (001) Ye Du, Shoma Arai, Shingo Kaneta-Takada, Le Duc Anh, Shutaro Karube, Makoto Kohda, Shinobu Ohya and Junsaku Nitta [AIP Advances 10 , 105010 (2020).] [101] Tunneling mechanism in a (Ga,Mn)As/GaAs-based spin Esaki diode investigated by bias-dependent shot noise measurements T. Arakawa, J. Shiogai, M. Maeda, M. Ciorga, M. Utz, D. Schuh, Y. Niimi, M. Kohda, J. Nitta, D. Bougeard, D. Weiss, and K. Kobayashi [PHYSICAL REVIEW B 102, 045308 (2020).] [100] Enhanced longevity of the spin helix in low-symmetry quantum wells Daisuke Iizasa, Makoto Kohda, Ulrich Zulicke, Junsaku Nitta, and Michael Kammermeier [PHYSICAL REVIEW B, 101, 245417 (2020).] [99] Current direction dependent spin Hall magnetoresistance in epitaxial Pt/Co bilayers on MgO(110) R. Thompson, R. Jeongchun, Y. Du, S. Karube, M. Kohda, and J. Nitta [PHYSICAL REVIEW B, 101, 214415 (2020).] [98] Spin?orbit parameters derivation using single-frequency analysis of InGaAs multiple quantum wells in transient spin dynamics regime H. Shida, K. Kawaguchi, Y. Saito, I. Takazawa, T. Fukasawa, D. Iizasa, T. Saito, T. Kitada, Y. Ishitani, M. Kohda and K. Morita [Journal of Applied Physics, 127, 153901 (2020).] [97] Disentanglement of Spin-Orbit Torques in Pt/Co Bilayers with the Presence of Spin Hall Effect and Rashba-Edelstein Effect Y. Du, H. Gamou, S. Takahashi, S. Karube, M. Kohda, J. Nitta [Physical Review Applied, 13, 054014 (2020).] [96] Spin accumulation in photo-induced potential dimples generated in semiconductors H. Sanada, A. M. Stramma, Y. Kunihashi, Y. Tanaka, H. Gotoh, K. Onomitsu, F. Tagarelli, M. Kohda, J. Nitta, and T. Sogawa, [Communications Physics ,3, 11 (2020).] [95] Anomalous spin-orbit field via the Rashba-Edelstein effect at the W/Pt interface S. Karube, N. Tezuka, M. Kohda, and J. Nitta [Physical Review Applied,13, 024009 (2020).] [94] Detection of Spin Transfer from Metal to Molecule by Magnetoresistance Measurement H. Gamou, K. Shimose, R. Enoki, E. Minamitani, A. Shiotari, Y. Kotani, K. Toyoki, T. Nakamura, Y. Sugimoto, M. Kohda, J. Nitta, and S. Miwa [Nano Letters,20, 75-80 (2020).] [93] Temperature-dependent spin Hall effect tunneling spectroscopy in platinum K. Nakagawara, S. Kasai, J. Ryu, S. Mitani, L. Liu, M. Kohda, and J. Nitta [Applied Physics Letters,115, 162403 (2019).] [92] Transient diffusive spin dynamics in intrinsic InGaAs/InAlAs multiple quantum wells K. Kawaguchi, T. Fukasawa, I. Takazawa, H. Shida, Y. Saito, D. Iizasa, T. Saito, T. Kitada, Y. Ishitani, M. Kohda, and K. Morita [Applied Physics Letters,115, 172406 (2019).] [91] Simultaneous evaluation of drift- and diffusion-induced spin-orbit fields in a (001) GaAs/AlGaAs two-dimensional electron gas T. Saito, A. Aoki, J. Nitta, and M. Kohda [Applied Physics Letters,115,052402 (2019).] [90] Temperature and laser energy dependence of the electron g-factor in intrinsic InGaAs/InAlAs multiple quantum wells K. Morita, A. Okumura, H. Takaiwa, I. Takazawa, T. Oda, T. Kitada, M. Kohda, and Y. Ishitani [Applied Physics Letters,115,012404 (2019).] [89] Detection of both optical polarization and coherence transfers to excitonic valley states in CVD-grown monolayer MoS2 E. Asakura, M. Suzuki, S. Karube, J. Nitta, K. Nagashio and M. Kohda [Applied Physics Express,12,063005 (2019).] [88] Evaluation of spin-orbit torque in a L10-FePt single layer and a L10-FePt/Pt bilayer T. Sato, T. Seki, M. Kohda, J-C. Ryu, H. Gamou, S. Karube, K. Takanashi, and J. Nitta [Japanese Journal of Applied Physics,58,060915 (2019).] [87] Enhancement of spin current generation in epitaxial α-Ta/CoFeB bilayer H. Gamou, Y. Du, M. Kohda, and J. Nitta [Physical Review B,99,184408 (2019).] [86] Spin-momentum locked spin manipulation in a two-dimensional Rashba system M. Kohda , T. Okayasu and J. Nitta [Scientific Reports,9,1909 (2019).] [85] Crystal orientation dependence of spin-orbit torques in Co/Pt bilayers J. Ryu, C. O. Avci, S. Karube, M. Kohda, G. S. D. Beach, and J. Nitta [Applied Physics Letters,114,142402 (2019).] [84] Phase velocity of drifting spin wave packets in semiconductor two dimensional electron gas Y. Tanaka, Y. Kunihashi, H. Sanada, H. Gotoh, K. Onomitsu, M. Kohda, J. Nitta, and T. Sogawa [Applied Physics Express ,12,013001 (2019).] [83] Robustness of a persistent spin helix against a cubic Dresselhaus field in (001) and (110) oriented two-dimensional electron gases D Iizasa, D. Sato, K. Morita, J. Nitta, and M. Kohda. [Physical Review B,98,165112 (2018).] [82] Magnetics and Optics Research S. Okamoto, H. Munekata, T. Goto, M. Kohda. , I. Matsuda, K. Sekiguchi, Y. Shiratsuchi, A. Roman [Jpn. J. Appl. Phys. 57, 09T001(2018).] [81] Spatial variation of dynamic nuclear spin polarization probed by the non-local Hanle effect J. Shiogai, M. Ciorga, M. Utz, D. Schuh, M. Kohda, , D. Bougeard, T. Nojima, D. Weiss, and J. Nitta. [Applied Physics Letters 112, 132403 (2018).] [80] Enhancement of spin-orbit interaction of Cu thin films by oxidation treatment R. Enoki, H. Gamou, M. Kohda, and J. Nitta. [Applied Physics Express 11, 033001 (2018).] [79] Effect of optical waveguide on photoluminescence polarization in layered material GaSe with millimeter scale M. Suzuki, M. Kohda, S. Takasuna, S. Matsuzaka,Y. Sato, T. Tanabe, Y. Oyama,and J. Nitta. [Japanese Journal of Applied Physics,57,020308 (2018).] [78] Drift-induced enhancement of cubic Dresselhaus spin-orbit interaction in a two-dimensional electron gas Y. Kunihashi, H. Sanada, Y. Tanaka, H. Gotoh, K. Onomitsu, K. Nakagawara,M. Kohda, J. Nitta, and T. Sogawa. [Physical Review Letters 119, 187703 (2017).] [77] Electric field-induced on / off switching of the Faraday effect Y. Hibino, T. Koyama, S. Sumi, H. Awano, K. Miwa,S. Ono, M. Kohda, and D. Chiba. [Applied Physics Express 10, 123201 (2017).] [76] Weak antilocalization induced by Rashba spin-orbit interaction in layered III-VI compound semiconductor GaSe thin films S. Takasuna, J. Shiogai, S. Matsuzaka, M. Kohda, Y. Oyama,and J. Nitta. [Physical Review B Rapid Communications,96,161303(R) (2017).] [75] Physics and application of persistent spin helix state in semiconductor heterostructures M. Kohda, and G. Salis. [Semiconductor Science and Technology (Topical Review) 32, 073002 (2017).] [74] Different spin relaxation mechanisms between epitaxial and polycrystalline Ta thin films H. Gamou, J-C. Ryu, M. Kohda, and J. Nitta. [Applied Physics Express 10, 023003 (2017).] [73] Observation of the D’yakonov-Perel’ spin relaxation in single-crystalline Pt thin films J-C. Ryu, M. Kohda, and J. Nitta. [Physical Review Letters 116, 256802 (2016).] [72] Control of magnetic anisotropy in Pt / Co system using ionic liquid gating T. Hirai, T. Koyama, A. Obinata, Y. Hibino, K. Miwa, S. Ono, M. Kohda, and D. Chiba. [Applied Physics Express 9, 063007 (2016).] [71] Current-controlled spin precession of quasistationary electrons in a cubic spin-orbit field P. Altmann, F. G. G. Hernandez, G. J. Ferreira, M. Kohda, C. Reichl, W. Wegscheider, and G. Salis. [Physical Review Letters 116, 196802 (2016).] [70] Gate-controlled switching between persistent and inverse persistent spin helix states K. Yoshizumi, A. Sasaki, M. Kohda, and J. Nitta. [Applied Physics Letters, 708 (2016) 134202.] [69] Drift transport of helical spin coherence with tailored spin-orbit interactions Y. Kunihashi, H. Sanada, H. Gotoh, K. Onomitsu, M. Kohda, J. Nitta, and T. Sogawa. [Nature Communications 7, 10722 (2016).] [68] Bias dependence of spin injection/transport properties of a perpendicular magnetized FePt / MgO / GaAs structure R. Ohsugi, Y. Kunihashi, H. Sanada, M. Kohda, H. Gotoh, T. Sogawa and J. Nitta. [Applied Physics Express 9, 043002-1-043002-4 (2016).] [67] Transition of a two-dimensional spin mode to a helical state by lateral confinement P. Altmann, M. Kohda, C. Reichl, W. Wegscheider, and G. Salis. [Physical Review B 92, 235304-1-235304-6 (2015).] [66] Effect of cubic Dresselhaus spin-orbit interaction in a persistent spin helix state including phonon scattering in semiconductor quantum wells R. Kurosawa, K. Morita, M. Kohda, and Y. Ishitani. [Applied Physics Letters 107, 182103-1-182103-5 (2015).] [65] All-optical evaluation of spin-orbit interaction based on diffusive spin motion in a two dimensional electron gas M. Kohda, P. Altmann, D. Schuh, S. D. Ganichev, W. Wegscheider, and G. Salis. [Applied Physics Letters 107, 172402-1-172402-4 (2015).] [64] Enhancement of electric field modulation of coercivity in Pt /Co/Al-O structures by tuning Co surface oxidation J. Shiogai, T. Ohashi, T. Yang, M. Kohda, T. Seki, K. Takanashi and J. Nitta. [Journal of Physics D: Applied Physics 49, 03LT01-03LT05 (2015).] [63] In-plane tunneling anisotropic magnetoresistance in (Ga,Mn)As/GaAs Esaki diodes in the regime of the excess current J. Shiogai, M. Ciorga, M. Utz, D. Schuh, M. Kohda, D. Bougeard, T. Nojima, D. Weiss, and J. Nitta. [Applied Physics Letters 106, 262402-1-262402-5 (2015)..] [62] Shot Noise Induced by Nonequilibrium Spin Accumulation T. Arakawa, J. Shiogai, M. Ciorga, M. Utz, D. Schuh, M. Kohda, J. Nitta, D. Bougeard, D. Weiss, T. Ono, and K. Kobayashi. [Physical Review Letters 114, 016601-1-016601-5 (2015).] [61] Layer thickness dependence of spin orbit torques and fields in Pt/Co/AlO trilayer structures T. Yang, M. Kong, M. Kohda, T. Seki, K. Takanashi, and J. Nitta. [Japanese Journal of Applied Physics 54, 04DM05-1-04DM05-6 (2015).] [60] Comparison of electrical and optical detection of spin injection in L10-FePt/ MgO / GaAs hybrid structures R. Ohsugi, J. Shiogai, Y. Kunihashi, M. Kohda, H. Sanada, T. Seki, M. Mizuguchi, H. Gotoh, K. Takanashi and J. Nitta. [Journal of Physics D: Applied Physics 48, 164003-1-164003-6 (2015)] [59] Direct determination of spin-orbit interaction coefficients and realization of the persistent spin helix symmetry A. Sasaki, S. Nonaka, Y. Kunihashi, M. Kohda, T. Bauernfeind, T. Dollinger, K. Richter, and J. Nitta. [Nature Nanotechnology 13, (2014) 703-709.] [58] Giant enhancement of spin detection sensitivity in (Ga,Mn)As/GaAs Esaki diodes J. Shiogai, M. Ciorga, M. Utz, D. Schuh, M. Kohda, D. Bougeard, T. Nojima, J. Nitta, and D. Weiss. [Physical Review B Rapid Communication 89, (2014) 081307] [57] Platinum layer thickness dependence of spin-Hall induced effective field in Pt/Co/Pt structures T. Yang, M. Kohda, T. Seki, K. Takanashi, and J. Nitta. [Japanese Journal of Applied Physics 53, 04EM06-1-04EM06-5 (2014)] [56] Perpendicular Magnetic Anisotropy in Pt/Co/AlO Trilayer Structures Depending on AlO Thickness and Fabrication Method T. Yang, Z.Q. Wang, M. Kohda, T. Seki, K. Taknashi, and J. Nitta. [Key Engineering Materials 616, 247-251 (2014)] [55] Platinum thickness dependence and annealing effect of the spin-Seebeck voltage in platinum/yttrium ion garnet structures Y. Saiga, K. Mizunuma, Y. Kono, J.-C. Ryu, H. Ono, M. Kohda, and E. Okuno. [Applied Physics Express 7, (2014) 093001-1 – 093001-4 (2014)] [54] Shot noise at the quantum point contact in InGaAs heterostructure Y. Nishihara, S. Nakamura ,K. Kobayashi, T, Ono, M. Kohda, and J. Nitta[AIP Conference Proceedings 1566, (2013), 311 ] [53] Chirality determination of ferromagnetic disk by local Hall effect A. S. Demiray, M. Kohda, and J. Nitta [Applied Physics Letters,. 103, (2013) 122408] [52]Voltage-induced coercivity change in FePt/MgO stacks with different FePt thicknesses Y. Kikuchi, T. Seki, M. Kohda, J. Nitta, and K. Takanashi [Journal of Physics D,. 46, (2013) 285002] [51]Manipulation of mobile spin coherence using magnetic-field-free electron spin resonance H. Sanada, Y. Kunihashi, H. Gotoh, K. Onomitsu, M. Kohda, J. Nitta, P. V. Santos, and T. Sogawa [Nature Physics,. 9, (2013) 280] [50]Structural and magnetic properties of L10-FePd/MgO films on GaAs and InP lattice mismatched substrates M. Kohda, S. Iimori, R. Ohsugi, H. Naganuma, T. Miyazaki, Y. Ando and J. Nitta [Applied Physics Letters,. 102, (2013) 102411] [49]Spin orbit induced electronic spin separation in semiconductor nanostructures M. Kohda, S. Nakamura, Y. Nishihara, K. Kobayashi, T. Ono, J. Ohe, Y. Tokura, T. Mineno and J. Nitta [Nature Communications,. 3, (2012) 1038] [48]Gate-controlled persisitent spin helix state in (In,Ga)As quantum wells M. Kohda, V. Lechner, Y. Kunihashi, T. Dollinger, P. Olbrich, C. Schonhuber, I. Caspers, V. V. Bel’kov, L. E. Golub, D. Weiss, K. Richter, J. Nitta, and S. D. Ganichev [Physical Review B,. 86, (2012) 081306(R)] [47]Dynamic nuclear spin polarization in an allsemiconductor spin injection device with (Ga,Mn)As/n-GaAs spin Esaki diode J. Shiogai, M. Ciorga, M. Ultz, D. Schuh, T. Arakawa, M. Kohda, K. Kobayashi, T. Ono, W. Wegscheider, D. Weiss and J. Nitta [Applied Physics Letters,. 101, (2012) 212402] [46]Shot noise suppression in InGaAs/InGaAsP quantum channels Y. Nishihara, S. Nakamura, K. Kobayashi, T. Ono, M. Kohda and J. Nitta [Applied Physics Letters,. 100, (2012) 203111] [45]Electrical determination of relative chirality direction in a Co/Cu/Co ferromagentic ring A. S. Demiray, M. Kohda, T. Miyawaki , Y. Watanabe, K. Saito, S. Mitani, K. Takanashi, and J. Nitta [Applied Physics Letters,. 101, (2012) 062409] [44]Proposal of spin complementary field effect transistor Y. Kunihashi, M. Kohda, H. Sanada, H. Gotoh, T. Sogawa, and J. Nitta [Applied Physics Letters,. 100, (2012) 113502] [43]Experimental demonstration of spin geometric phase: radius dependence of time reversal Aharonov-Casher oscillations F. Nagasaswa, J. Takagi, Y. Kunihashi,M. Kohda, and J. Nitta [Physical Review Letters,. 108, (2012) 086801] [42]Semiclassical approach for spin dephasing in a quasi-one-dimensional channel Y. Kunihashi, M. Kohda, and J. Nitta [Physical Review B,. 85, (2012) 035321] [41]Anisotropy and Damping in Co2FeAl0.5Si0.5via electrical detection of ferromagnetic resonance L. Bai, N. Tezuka, M. Kohda, and J. Nitta [Japanese Journal of Applied Physics,. 51, (2012) 083001] [40]Relative vortex state control in a Co/Cu/Co pseudo-spin-valve ring A. S. Demiray, T. Miyawaki, Y. Watanabe,M. Kohda, K. Saito, S. Mitani, K. Takanashi, and J. Nitta [Japanese Journal of Applied Physics,. 51, (2012) 04DM04] [39]Anisotropic weak anti-localization under in-plane magentic field and control of dimensionality via spin precession length S. Nonaka, Y. Kunihashi,M. Kohda, and J. Nitta [Japanese Journal of Applied Physics,. 51, (2012) 04DM01] [38] MgO layer thickness dependence of structure and magnetic properties of L10-FePt/MgO/GaAs structures R. Ohsugi,M. Kohda, T. Seki, A. Ohtsu, M. Mizuguchi, K. Takanashi, and J. Nitta [Japanese Journal of Applied Physics,. 51, (2012) 02BM05] [37]Anisotropic spin transport affected by competition between spin orbit interaction and Zeeman effect in an InGaAs based wire J. Nitta, S. Moulis, and M. Kohda [J. Phys. Conference Series,. 334, (2011) 012062] [36]Suppression of Aharanov-Casher spin interference in an InGaAs ring array J. Nitta, J. Takagi, F. Nagasawa, and M. Kohda [J. Phys. Conference Series,. 302, (2011) 012002] [35]Acoustically induced spin-orbit interactions reveald by two-dimensional imaging of spin transport in GaAs H. Sanada, T. Sogawa, H. Gotoh, K. Onomitsu, M. Kohda, J.Nitta, and P. V. Santos [Physical Review Letters,. 106, (2011) 216602] [34]Coercivity change in an FePt thin layer in a Hall device by voltage application T. Seki, M. Kohda, J.Nitta, and K. Takanashi [Applied Physics Letters,. 98, (2011) 212505] [33]Observation of spin wave modes depending on a tunnable periodic magnetic field L. Bai, M. Kohda, and J.Nitta [Applied Physics Letters,. 98, (2011) 172508] [32]Magnitude and sign control of lithography-induced uniaxial anisotropy in ultra-thin (Ga,Mn)AsMagnitude and sign control of lithography-induced uniaxial anisotropy in ultra-thin (Ga,Mn)As J. Shiogai, D. Schuh, W. Wegscheider, M. Kohda, J.Nitta, and D. Weiss [Applied Physics Letters,. 98, (2011) 083101] [31]Enhancement of Spin-Orbit Interaction and the Effect of Interface Diffusion in Quaternary InGaAsP/InGaAs heterostructures M. Kohda and J.Nitta [Physical Review B. 81, (2010) 115118] 10.1103/PhysRevB.81.115118 [30]Electrical detection of propagating spin waves controlled by a local magnetic field induced by a DC current. L. H. Bai, M. Kohda, and J. Nitta [Japanese Journal of Applied Physics, 49, (2010) 04DM01] [29]Spin-Orbit Interaction in an In0.53Ga0.47As/In0.7Ga0.3As Shallow Two-Dimensional Electron Gas Located 5nm Below InP Surface Barrier. M. Kohda, T. Shibata, and J. Nitta [Japanese Journal of Applied Physics, 49, (2010) 04DM02] [28]Width and Temperature Dependence of Lithography-Induced Magnetic Anisotropy in (Ga,Mn)As M. Kohda, J. Ogawa, J. Shiogai, F. Matsukura, Y. Ohno, H. Ohno, and J. Nitta [Physica E.,42, 2685-2689 (2010) ] doi:10.1016/j.physe.2009.12.019 [27]Proposal for electrical detection of spin separation with in-plane magentic field in mesoscopic Stern-Gerlach spin filter M. Kohda, J. Ohe, H. Sanada, M. Yamamoto, T. Ohtsuki, and J. Nitta [Proc. SPIE 7600, (2010) 76001B] doi:10.1117/12.845569 [26]Electrical spin manipulation with Al2O3 gate insulator in InGaAs based mesoscopic ring arrays J. Takagi, M. Kohda, and J. Nitta [Physics Procedia. 3, (2010) 1317] [25]Experimental demonstration of resonant spin-orbit interaction effect Y. Kunihashi,M. Kohda, and J. Nitta [Physics Procedia. 3, (2010) 1261] [24] Anisotropic spin splitting in InGaAs wire structures Y. Kunihashi, M. Kohda, and J. Nitta [Physics Procedia. 3, (2010) 1255] [23]Enhancement of Rashba Spin-Orbit Interaction due to Wave Function Engineering Y. Kunihashi, M. Kohda, and J. Nitta [Journal of Superconductivity and Novel Magnetism. 23, (2010) 49] [22] Electronic Aharonov-Casher Effect in InGaAs Ring Arrays J. Nitta, M. Kohda, and T. Bergsten [Proceedings of the 9th International Symposium on Foundation of Quantum Mechanics in the Light of New Technology. (2009) 105] [21]Electrical Manipulation of Spins in the Rashba Two Dimensional Electron Gas Systems J. Nitta, T. Bergsten, Y. Kunihashi, and M. Kohda [Journal of Applied Physics. 105, (2009) 122402] [20] Enhancement of Spin Lifetime in Gate-Fitted InGaAs Narrow Wires Y. Kunihashi, M. Kohda, and J. Nitta [Physical Review Letters. 102, (2009) 226601] [19]All-Electrical Detection of the Relative Strength of Rashba and Dresselhaus Spin-Orbit Interaction in Quantum Wires M. Scheid, M. Kohda, Y. Kunihashi, K. Richter, and J. Nitta [Physical Review Letters. 101, (2008) 266401] [18] Effect of the array distance on the magntization configuration of submicron-sized ferromagnetic rings. T. Miyawaki, K. Toyoda, M. Kohda, A. Fujita, and J. Nitta [Proceedings of the international symposium on mesoscopic superconductivity and spintronics, (2008), 271-276] [17] Comparison of gate sensitivity for spin interference effect between Al2O3 and SiO2 gate insulators on InGaAs based mesoscopic ring arrays. M. Kohda, J. Takagi, and J. Nitta [ECS Transactions 16, (2008), 39-49] [16]High remanent magnetization of L10-ordered FePt thin film on MgO / (001) GaAs. M. Kohda, A. Ohtsu, T. Seki, A. Fujita, J. Nitta, S. Mitani, and K. Takanashi [Japanese Journal of Applied Physics, 47, (2008), 3269 – 3271] [15]Manipulating spin orbit interaction in semiconductors. Makoto Kohda, Tobias Bergsten, and Junsaku Nitta [Journal of the Physics Society of Japan,77(3),(2008),031008-1-031008-9] [14]Quantum well thickness dependence of spin orbit interaction in a gated InP / In0.8Ga0.2As / In0.52Al0.48As asymmetric quantum wells. M. Kohda, T. Nihei, and J. Nitta [Physica E,40(5),(2008),1194-1196] [13]Suppression of stray field between adjacent rings in one dimensional ferromagnetic ring arrays M. Kohda, K. Toyoda, T. Miyawaki, A. Fujita, and J. Nitta [Journal of Applied Physics,103,(2008),07A714-1-07A714-3] [12] Control of interlayer magnetostatic coupling in submicron-sized Fe/Au/Fe rings. T. Miyawaki, M. Kohda, A. Fujita, and J. Nitta [Appl. Phys. Lett.,92,(2008),32502-32504] [11] Rashba spin orbit interaction of In0.53Ga0.47As / In0.7Ga0.3As / In0.53/Ga0.47As shallow two dimensional electron gas by surface etching. Y. Kunihashi, T. Nihei, M. Kohda, and J. Nitta, [Physica Status Solidi C, 5, (2008), 322-324] [10] Local Hall measurement of magnetization reversal and magnetic interaction in Fe / Au / Fe trilayer rings T. Miyawaki, M. Kohda, A. Fujita, and J. Nitta [Physica Status Solidi C, 5, (2008), 294-297] [9]Lateral and vertical magnetic interaction in submicron-sized Fe ring arrays and Fe / Au / Fe trilayer ring structures M. Kohda, K. Takagi, T. Miyawaki, K. Toyoda, A. Fujita, and J. Nitta [Jpn. J. Appl. Phys., 46, (2007), 2164-2166] [8]Gate controlled crossover from weak localization to weak antilocalization in a narrow gap InGaAs / InP heterostructure. T. Nihei, Y. Suzuki, M. Kohda, and J. Nitta, [Physica Status Solidi C,12(3),(2006),4239-4242] [7]Magnetoresistance oscillations induced by spin orbit interaction and intersubband scattering in a gated InP / InGaAs / InAlAs heterostructure. M. Abe,M. Kohda, and J. Nitta, [Physica Status Solidi C,3(12),(2006),4243-4246] [6]Spin injection with three terminal device based on (Ga,Mn)As / n+-GaAs tunnel junction. T. Kita, M. Kohda, Y. Ohno, F. Matsukura, and H. Ohno, [Physica Status Solidi C,3(12),(2006),4164-4167] [5]Magnetic interaction of submicron-sized ferromagnetic rings in a one-dimensional array. T. Miyawaki, K. Toyoda, M. Kohda, A. Fujita, and J. Nitta, [Appl. Phys. Lett.,89,(2006),122508(1)-122508(1)] [4] Bias voltage dependence of the electron spin injection studied in a three-terminal device based on GaMnAs/n+-GaAs Esaki diode. Makoto Kohda, Tomohiro Kita, Yuzo Ohno, F. Matsukura, and Hideo Ohno, [Appl. Phys. Lett.,89,(2006),012103] [3]Effect of n+-GaAs thickness and doping density on spin injection of GaMnAs/n+-GaAs Esaki tunnel junction M. Kohda, Y. Ohno, F. Matsukura and H. Ohno, [Physica E,32,(2006),438] [2]Electrical electron spin injection with a p+-(Ga,Mn)As/n+-GaAs tunnel junction M. Kohda, Y. Ohno, K. Takamura, F. Matsukura and H. Ohno, [Journal of Superconductivity, Vol.16, Issue 1,167 (2003)] [1] A Spin Esaki diode M. Kohda, Y. Ohno, K. Takamura, F. Matsukura and H. Ohno, [Jpn. J. Appl. Phys. Vol.40, Part2, Express letter, No12A. L1274 (2001)] Invited lecture (international conference) [Invited] M. Kohda, “Spin manipulation by spin momentum locking in Rashba two-dimensional system” 2019 3rd EPiQS-TMS alliance workshop on Topological Phenomena in Quantum Materials October 23rd 2019 USCB, USA [Invited] M. Kohda, “Spin manipulation by spin-momentum locking in a two-dimensional Rashba system” 2019 SPIE NanoScience and Engineering Spintronics XII August 11th 2019 San Diego, USA [Invited] M. Kohda, “Spin orbit interaction in a layered semiconductor GaSe” 2018 Tohoku/SG-Spin Workshop on Spintronics February 20th-21st 2018 Sendai, Japan [Invited] M. Kohda, “Spin-momentum locking on magnetic focusing manifested by semiconductor Stern-Gerlach spin filter” 2017 2nd Japan-China International Workshop on Quantum Technologies June 12th-13th 2017 Tokyo, Japan [Invited] M. Kohda, “Spin relaxation mechanism in single and poly crystalline Pt thin films” 2016 14st RIEC International Workshop on Spintronics November 18th-20th 2016 Sendai, Japan [Invited] M. Kohda, “Spin orbit interaction in metal-chalcogenide GaSe” 2016 International Symposium on Revolutionary Atomic-Layer Materials October 22nd-23th 2016 Sendai, Japan [Invited] M. Kohda, “Spin orbit interaction in III-V semiconductor 2DEG and layered semiconductor GaSe” 2016 Frontiers in Quantum Materials and Devices Workshop (FQMD2016) June 13th-14th 2016 Wako, Japan [Invited] M. Kohda, “Spin helix and inverse spin helix states for semiconductor spintronics” 2015 International Workshop on Quantum Nanostructures and Electron-Nuclear Spin Interactions October 21st-22nd 2015 Sendai, Japan [Invited] M. Kohda, “Electrical spin generation and manipulation in semiconductor heterostructures” 2015 21st International Conference on Electronic Properties of Two-Dimensional Systems and 17th International Conference on Modulated Semiconductor Structures July 26-31, 2015, Sendai, Japan [Invited] M. Kohda, “Spin orbit interaction in semiconductor heterostructures” 2014 SPIE Nanophotonics 2014, San Diego, August 17th – 21th (2014). [Invited] M. Kohda, “Stern-Gerlach type spin separation in semiconductor nanostructures” 2014 The 41st International Sympositum on Compound Semiconductor, May. 11-15th, 2014, Montpellier, France. [Invited] M. Kohda, “Spin-orbit induced spin generation in semiconductor nanostructures” 2013 Energy Materials Nanotechnology meeting, Oct. 21st-27th, 2013, Chengdu, China. [Invited] M. Kohda, “Spin orbit induced electronic spin polarization and its future application” 2013 International Conference on Solid State Devices and Materials SSDM2013, Sep. 24th-28th, 2013, Fukuoka, Japan. [Invited] M. Kohda, “Spin-orbit induced spin generation in InGaAs quantum wells” 2013 16th International Conference on Narrow Gap Semiconductors NGS16, August 2nd-6th, 2013, Hangzhou, China. [Invited] M. Kohda, “Spin-orbit induced electronic spin separation in semiconductor nanostructures” 2013 The 18th International Conference on electron Dynamics in Semiconductor, Optoelectronics and Nanostructures EDISON18, July 22nd-26th, 2013, Matsue, Japan. [Invited lecture] M. Kohda, “Spin orbit interaction and its application in semiconductors” 2013 JST-DFG ASPIMATT, July 1st-5th, 2013, Dresden, Germany. [Invited] M. Kohda, “Stern-Gerlach effect and spin separation in InGaAs nanostructures” 2013 American Physics Society (APS) March meeting, March 20th, 2013, Baltimore, USA. [Invited] M. Kohda, “Electrical spin separation and Stern-Gerlach effect in semiconductor nanostructures” 2012 AIMR spintronics workshop, Nov. 30th-Dec. 1st, 2012, Sendai, Japan [Invited] M. Kohda, “Electrical spin generation and manipulation by spin orbit interaction in semiconductor nanostructures” 2012 The 9th RIEC International Workshop on Spintronics , May. 31st-June. 2ndt, 2012, Sendai, Japan [Invited] M. Kohda, “Zero field spin polarization by Rashba spin orbit interaction in quantum point contacts” 2011 5th International Workshop on Spin Currents, July. 26th, 2011, Sendai, Japan [Invited] M. Kohda, “Spin manipulation and generation with spin oribt interaction in semiconductor heterostrucutures” 2010 SPIE Photonic West, Jan.. 26th, 2010, San Francisco, USA [Invited] M. Kohda, “Comparison of gate sensitivity for spin interference effect between Al2O3 and SiO2 gate insulators on InGaAs based mesoscopic ring arrays” 2008 214th Pacific rim meeting on electrochemical and solid state science, October 15th, Hawaii, USA Invited lecture (national conference) [Invited] Makoto Kohda, “Control of spin states by spin orbit interaction in semiconductors” 2018 Research Institute of Electrical Communication, Tohoku University-Information and Communications Joint Research Center-The 2017 Joint Project Research Presentation, February 22, 2018 Tohoku University. [Invited] Makoto Kohda, “Control of permanent spin gyration states in semiconductor quantum structures using spin-orbit interaction,” 2017 2017 Applied Physics Society of Japan Hokkaido Branch Lecture Meeting, November 10, 2017 Hokkaido University. [Invited] Makoto Kohda, “Spin Control Using Spin-Orbit Locking in Semiconductors” 2017 Tohoku University, Research Institute of Electrical Communication Joint Research Project “Construction and Device Applications for Precise Matter Science Based on Control of Charge and Spin, November 3, 2017 Sendai Moniasou . [Invited] Makoto Kohda, “Generation and Control of Helical Spin Order in Semiconductors” 2017 Toyota Science Institute Workshop “Dynamic Optical Control of Spin Order, October 19, 2017 Toyota Commemorative Museum of Industry and Technology. [Invited] Makoto Kohda,, “Spin Relaxation Mechanism and Spin-Orbit Torque in Epitaxial Pt and Ta Thin Films” 2017 Tohoku University Research Institute of Electrical Communication Joint Project Research Group, January 31, 2017 Tohoku University./li> [Invited] Makoto Kohda, “Spin Properties in Systems with Coexisting Rashba and Dresselhaus Spin-Orbit Interactions in Semiconductors” 2017 Ministry of Education, Culture, Sports, Science and Technology (MEXT) New Academic Field “Frontier of Materials Science Spun by Topology” 8th Intensive Cooperative Research Meeting “Physics of Odd Frequency Cooper Pairs” , January 6-7, 2017 Nagoya University. [Invited] Makoto Kohda, “New Developments in Spin-Orbit Interactions in Solids” 2016 10th Transdisciplinary Research Conference on Condensed Matter Science, December 9-10, 2016, Kobe University. [Invited] Makoto Kohda, “Spin production and its control using spin-orbit interactions in semiconductor quantum structures” 2016 2016 Spring Physics Society of Japan, Region 8,5,3 Joint Symposium, March 20, 2016 Tohoku Gakuin University. [Invited] Makoto Kohda, “Fundamentals and Applications of Spin-Orbit Interactions” 2015 14th Annual Introduction to Spintronics Seminar, December 17, 2015 Keio University. [Invited] Makoto Kohda, “Spin-Orbit Interactions in Semiconductor and Metal Thin Films” 2015 Research Institute of Electrical Communication, December 5, 2015 Tohoku University. [Invited] Makoto Kohda,”New Developments in Spin-Orbit Interactions in Semiconductors” 2015 172nd Spinics Research Meeting, October 2, 2015, Tohoku University. [Invited]Makoto Kohda,”Electrical Spin Generation and Control of Permanent Spin Rotational States Using Spin-Orbit Interactions” 2013 Fundamentals and Applications of Semiconductor Spin Optics PASPS-18, Dec. 9th-10th, 2013, Osaka University. [Invited] Makoto Kohda, “Stern-Gerlach Spin Filter with Spin-Orbit Interactions” 2013 The Magnetics Society of Japan, The 43rd Annual Meeting of the Magnetics Society of Japan, Control of Physical Properties by Electric Fields, Jan. 7th 2013, Kyoto. [Invited] Makoto Kohda, “Gate Field Spin Generation and Control in Semiconductors” 2012 Autumn Meeting of the Physical Society of Japan, Region 3, 4, 7 Symposium on New Developments in Device Physics -Materials Science of Electric Field Effects-, Sep. 20h 2012, Yokohama. [Invited] Makoto Kohda “Electrical Spin Generation and Control in Semiconductor Nanostructures” 2011 Dirac Electronics and Spintronics Symposium co-organized by the Department of Physics, Toho University and Center for Solid State Physics, Dec. 12th 2011, Chiba. [Invited] Makoto Kohda, “Electrical Spin Generation with InGaAs Quantum Point Contacts” 2011 Central Research Institute of Electric Power Industry (CRIEPI), Institute of Materials Science (CRIEPI), Young Scientists’ Workshop: Latest Topics in Advanced Technology – Towards the Creation of New Devices, Nov. 18th 2011, Tokyo. [Invited] Makoto Kohda, “Generating Spin Currents with InGaAs Quantum Point Contacts” 2011 New Phenomena of Spin Currents and Thermal Effects Jointly sponsored by the Japan Society of Applied Physics and the Magnetics Society of Japan, Nov. 15th 2011, Tokyo. [Invited] Makoto Kohda, “Spin generation and detection by spin orbit interaction in semiconductors” 2011 The University of Tokyo, Center for Quantum-Phase Electronics G-COE Program – A Center of Excellence in Education and Research in Physical Chemistry, QPEC Seminar, Aug. 13th 2011, Tokyo. [Invited] Makoto Kohda, “Spin Control and Spin Production through Semiconductor Spin-Orbit Interactions” 2011 1st “Progress in Physics and Applications of Electric Field Effects in Solid Materials”, Mar. 4th 2011, Tokyo. [Invited] Makoto Kohda, “Three-terminal device spin injection using GaMnAs/n+-GaAs tunnel junctions.” 2006 Symposium of the 53rd Annual Meeting of the Japan Society for Applied Physics and Related Societies, Mar. 22nd 2006, Kanagawa. [Invited]Makoto Kohda, “Spin Injection into Semiconductors” 2004 The 59th Annual Meeting of the Physical Society of Japan, Region 3 Symposium, Mar. 27th 2004, Fukuoka. Research Grants 2019 Challenging Research DUO for the Creation of a New Domain 2018 Intelligent Cosmos Incentive Award 2016 Tohoku University Strategic Research Startup Support Program 2015- Research Costs Research in New Academic Fields (Research Co-Sponsor)(No.15H05854) 2015- Research Fees Base (A)(No.15H02099) 2013-2014 Research expenses The germ of the challenge (No.25600011) 2012-2014 Grant-in-Aid Young Scientists (A)(No.24684019) 2011-2015 New Energy and Industrial Technology Development Organization (NEDO) Young Grants 2011 Japan Science and Technology Agency Research Seeds Search Program 2011 Research Center for Semiconductor Science and Engineering, STARC Research Grant 2009-2013 Maekawa Houonkai Academic Research Grant 2009-2010 Grant-in-Aid Young Scientists (B) (No.21760002) 2008 Sumitomo Foundation Basic Science Research Grant 2008-2012 JST, Japan Science and Technology Agency, “Structure and Control of the Interface”. 2007 Casio Science and Technology Promotion Foundation Research Grant 2007 Tohoku University Budding Researchers Development Program 2007-2009 Ministry of Internal Affairs and Communications Strategic Information and Communications R&D Promotion Program (Young ICT Researchers Training Program) 2007 Ikeya Foundation for Science and Technology Research Grant 2006 Murata Science Foundation Research Grant 2006-2007 Grants-in-Aid Young Scientists（B)(No.18760003) 2002-2005 Research Fellow of the Japan Society for the Promotion of Science (DC1) Awards 2020 The 14th Aoba Society for the Promotion of Engineering Award 2020 78th Annual Achievement Award of the Institute of Metals 2018 The 8th RIEC Award for Researchers at Tohoku University 2018 The 17th Intelligent Cosmos Incentive Award 2018 The Young Scientists’ Prize by the Ministry of Education, Culture, Sports, Science and Technology 2018 Graduate School of Engineering, Tohoku University Special Education Award for Graduate School of Engineering 2017 The 14th Japan Institute of Metals Murakami Award for Encouragement 2014 35th Honda Memorial Association Honda Memorial Encouragement Award 2010 The Honda Memorial Society’s 50th Harada Research Encouragement Award 2010 20th Tokin Foundation for the Promotion of Science and Technology Research Award 2006 Research Encouragement Award, Aoba Foundation for the Promotion of Engineering, 2006 2005 Tohoku University Electrical and Information Systems Excellence Award 2001 12th Applied Physics Conference Presentation Award 2001 IEICE Tohoku Branch Student Incentive Award