Realization of novel information processing and transmission using electron spin waves

• Project/Area Number: 21H04647
• Research Category: Grant-in-Aid for Scientific Research (A)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Medium-sized Section 29:Applied condensed matter physics and related fields
• Research Institution: Tohoku University
• Principal Investigator: 好田 誠 東北大学, 工学研究科, 教授 (00420000)
• Co-Investigator(Kenkyū-buntansha): 石原 淳 東北大学, 工学研究科, 助教 (50801156)
• Project Period (FY): 2021-04-05 – 2026-03-31
• Project Status: Granted (Fiscal Year 2025)
• Budget Amount: ¥41,990,000 (Direct Cost: ¥32,300,000、Indirect Cost: ¥9,690,000); Fiscal Year 2025: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000); Fiscal Year 2024: ¥7,540,000 (Direct Cost: ¥5,800,000、Indirect Cost: ¥1,740,000); Fiscal Year 2023: ¥7,020,000 (Direct Cost: ¥5,400,000、Indirect Cost: ¥1,620,000); Fiscal Year 2022: ¥12,090,000 (Direct Cost: ¥9,300,000、Indirect Cost: ¥2,790,000); Fiscal Year 2021: ¥12,220,000 (Direct Cost: ¥9,400,000、Indirect Cost: ¥2,820,000)
• Keywords: 電子スピン波 / スピン軌道相互作用 / 半導体量子構造 / スピントロニクス / 永久スピン旋回状態 / 多重性 / 並列性 / 波動性情報担体 / 半導体スピントロニクス / 半導体2次元電子ガス / ポンププローブ法 / III-V族半導体量子構造

Outline of Research at the Start

本研究は、光の独壇場である波の並列性や多重性を、電子スピン波を用いて半導体に組み込み、光通信と固体情報処理の間で「波」の性質を共有できる初めての情報担体を創出する。波の広帯域・空間並列・波長多重性と微細加工を得意とする半導体素子のスケーラビリティが融合し、膨大な情報量を半導体中で多重伝送・並列処理できる新たな固体情報基盤の学理を生み出す。これにより、情報通信と情報処理がシームレスに繋がるため、IoT・AI全盛期となる超スマート社会(Society5.0)が抱える通信量・電力消費の急増に対応可能な技術革新となる。

Outline of Annual Research Achievements

本研究は、光の独壇場である波の並列性や多重性を、電子スピン波を用いて半導体に組み込み、光通信と固体情報処理の間で「波」の性質を共有できる初めての情報担体を創出する。この目的のもとに本年度は、光の偏光空間構造を任意に制御することで様々な波長の電子スピン波を生成することに成功した。これは、半導体において電子スピン波の波長に情報を載せて演算処理するのに必要不可欠なマイルストーン技術となる。同時に、演算回路実証に向けたデバイスシミュレーションにも取り組み、複数の電子スピン波から特定の波長の電子スピン波のみを取り出す電子スピン波フィルタが実現できることを示した。このようなフィルタ回路は、既存電子デバイスでも極めて重要な機能であり、電子スピン波を用いた演算回路においても同様に重要な意味を持つ。これによって、今後は電子スピン波を用いた情報処理および情報伝送の基盤を確立することができたといえる。また、本年度はこのような電子スピン波が情報担体として活用することが可能であることを示すために電子スピンを用いた並列コンピューティングに関わるパースペクティブ論文(Perspective on spin-based wave-parallel computing)を執筆した。本論文は当該号のカバーにも採用されFeaturedとしても取り上げられ、このような波動性を活用した情報担体の注目度の高さが伺える。

Current Status of Research Progress

2: Research has progressed on the whole more than it was originally planned.

Reason

本研究では光の有する波の性質を半導体における電子スピンへ組み込むことで、これまでデジタル処理が基本であった電荷による情報処理から、波の広帯域・空間並列・波長多重性を組込んだ新たな原理を生み出すことを目的としている。これまで行ってきた空間偏光を電子スピン波に転写する技術基盤をもとにして、シミュレーションも活用することで、演算に向けてフィルタ回路の原理を示すことができ、電子スピン波が情報担体として活用できる具体的なデバイス提案まで行った。このことから順調に研究が進んでいると考えられる。

Strategy for Future Research Activity

今後は、より複雑な論理演算のシミュレーションや複数の電子スピン波を同時に生成・制御できる技術基盤を構築することが重要であると考えられる。また波の多重性や並列性を活用したデバイス提案についても進めることで、電子スピン波の情報担体としての能力を示す予定でいる。

Research Products

• [Int'l Joint Research] Julich Research Centre/Regensburg University(ドイツ)
• [Int'l Joint Research] IBM Zurich laboratory(スイス)
• [Int'l Joint Research] University of Paris Saclay(フランス)
• [Int'l Joint Research] ユーリッヒ研究所(ドイツ)
• [Int'l Joint Research] ウェリントン大学(ニュージーランド)
• [Journal Article] Characterization of the out-of-plane Dresselhaus effective magnetic field in InGaAs/InAlAs (110) multiple quantum wells at room temperature (2023)
  • Author(s): Sato Shota、Sugaya Kyohei、Nakanishi Koichi、Yokota Nobuhide、Kohda Makoto、Morita Ken
  • Journal Title: Japanese Journal of Applied Physics Volume: 62 Issue: 4 Pages: 048001-048001
  • DOI: 10.35848/1347-4065/acbff6
  • Peer Reviewed
• [Journal Article] Bismuth induced enhancement of Rashba spin-orbit interaction in GaAsBi/GaAs heterostructures (2023)
  • Author(s): Kunihashi Yoji、Shinohara Yasushi、Hasegawa Sho、Nishinaka Hiroyuki、Yoshimoto Masahiro、Oguri Katsuya、Gotoh Hideki、Kohda Makoto、Nitta Junsaku、Sanada Haruki
  • Journal Title: Applied Physics Letters Volume: 122 Issue: 18 Pages: 182402-182402
  • DOI: 10.1063/5.0145496
  • Peer Reviewed / Open Access
• [Journal Article] Deterministic Current‐Induced Perpendicular Switching in Epitaxial Co/Pt Layers without an External Field (2023)
  • Author(s): Ryu Jeongchun、Avci Can Onur、Song Moojune、Huang Mantao、Thompson Ryan、Yang Jiseok、Ko San、Karube Shutaro、Tezuka Nobuki、Kohda Makoto、Kim Kab‐Jin、Beach Geoffrey S. D.、Nitta Junsaku
  • Journal Title: Advanced Functional Materials Volume: 33 Issue: 35 Pages: 2209693-2209693
  • DOI: 10.1002/adfm.202209693
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Perspective on spin-based wave-parallel computing (2023)
  • Author(s): Kohda Makoto、Seki Takeshi、Yuminaka Yasushi、Uemura Tetsuya、Kikuchi Keito、Salis Gian
  • Journal Title: Applied Physics Letters Volume: 123 Issue: 19 Pages: 190502-190502
  • DOI: 10.1063/5.0168083
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Imprinting Spatial Helicity Structure of Vector Vortex Beam on Spin Texture in Semiconductors (2023)
  • Author(s): Ishihara Jun、Mori Takachika、Suzuki Takuya、Sato Sota、Morita Ken、Kohda Makoto、Ohno Yuzo、Miyajima Kensuke
  • Journal Title: Physical Review Letters Volume: 130 Issue: 12 Pages: 126701-126701
  • DOI: 10.1103/physrevlett.130.126701
  • Peer Reviewed
• [Journal Article] Lifetime of spin-orbit induced spin textures in a semiconductor heterostructure probed by quantum corrections to conductivity (2022)
  • Author(s): Saito Takahito、Nishimura Toshimichi、Yoon Ju-Young、K?lzer Jonas、Iizasa Daisuke、Kammermeier Michael、Sch?pers Thomas、Nitta Junsaku、Kohda Makoto
  • Journal Title: Physical Review Research Volume: 4 Issue: 4 Pages: 043217-043217
  • DOI: 10.1103/physrevresearch.4.043217
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Development of an optically gated <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mi>Fe</mml:mi><mml:mo>/</mml:mo><mml:mi>n</mml:mi><mml:mtext>-GaAs</mml:mtext></mml:mrow></mml:math> spin-polarized transistor (2022)
  • Author(s): Kim J. Y.、Samiepour M.、Jackson E.、Ryu J.、Iizasa D.、Saito T.、Kohda M.、Nitta J.、Beere H. E.、Ritchie D. A.、Hirohata A.
  • Journal Title: Physical Review B Volume: 106 Issue: 13 Pages: 134404-134404
  • DOI: 10.1103/physrevb.106.134404
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Selective damping modulation in a synthetic antiferromagnet induced by spin?orbit torque (2022)
  • Author(s): Karube Shutaro、Hoshika Takumi、Zhang Chaoliang、Kohda Makoto、Nitta Junsaku
  • Journal Title: Applied Physics Express Volume: 15 Issue: 10 Pages: 103001-103001
  • DOI: 10.35848/1882-0786/ac9512
  • Peer Reviewed
• [Journal Article] Observation of Spin-Splitter Torque in Collinear Antiferromagnetic RuO2 (2022)
  • Author(s): Karube Shutaro、Tanaka Takahiro、Sugawara Daichi、Kadoguchi Naohiro、Kohda Makoto、Nitta Junsaku
  • Journal Title: Physical Review Letters Volume: 129 Issue: 13 Pages: 137201-137201
  • DOI: 10.1103/physrevlett.129.137201
  • Peer Reviewed
• [Journal Article] Efficient spin-orbit torque in magnetic trilayers using all three polarizations of a spin current (2022)
  • Author(s): Ryu Jeongchun、Thompson Ryan、Park Jae Yeol、Kim Seok-Jong、Choi Gaeun、Kang Jaimin、Jeong Han Beom、Kohda Makoto、Yuk Jong Min、Nitta Junsaku、Lee Kyung-Jin、Park Byong-Guk
  • Journal Title: Nature Electronics Volume: 5 Issue: 4 Pages: 217-223
  • DOI: 10.1038/s41928-022-00735-9
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Thickness dependence of spin?orbit torques in Pt/Co structures on epitaxial substrates (2022)
  • Author(s): Choi Gaeun、Ryu Jeongchun、Thompson Ryan、Choi Jong-Guk、Jeong Jimin、Lee Sungjun、Kang Min-Gu、Kohda Makoto、Nitta Junsaku、Park Byong-Guk
  • Journal Title: APL Materials Volume: 10 Issue: 1 Pages: 011105-011105
  • DOI: 10.1063/5.0077074
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] D’yakonov?Perel and Elliot?Yafet spin relaxation rates in InGaAs/InAlAs multiple quantum wells at room temperature (2022)
  • Author(s): Arikawa Ayuki、Saito Yasuhito、Nakanishi Koichi、Sato Shota、Sugaya Kyohei、Yokota Nobuhide、Kohda Makoto、Morita Ken
  • Journal Title: Applied Physics Express Volume: 15 Issue: 4 Pages: 043001-043001
  • DOI: 10.35848/1882-0786/ac5a16
  • Peer Reviewed
• [Journal Article] Anisotropic spin dynamics in semiconductor narrow wires from the interplay between spin-orbit interaction and planar magnetic field (2022)
  • Author(s): Sonehara Junpei、Kammermeier Michael、Sato Dai、Iizasa Daisuke、Z?licke Ulrich、Karube Shutaro、Nitta Junsaku、Kohda Makoto
  • Journal Title: Physical Review B Volume: 105 Issue: 9 Pages: 094434-094434
  • DOI: 10.1103/physrevb.105.094434
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Room-temperature spin?orbit magnetic fields in slightly misoriented (110) InGaAs/InAlAs multiple quantum wells (2021)
  • Author(s): Nakanishi Koichi、Arikawa Ayuki、Saito Yasuhito、Iizasa Daisuke、Iba Satoshi、Ohno Yuzo、Yokota Nobuhide、Kohda Makoto、Ishitani Yoshihiro、Morita Ken
  • Journal Title: Applied Physics Letters Volume: 119 Issue: 3 Pages: 032405-032405
  • DOI: 10.1063/5.0055876
  • Peer Reviewed
• [Journal Article] Distinguishing persistent effects in an undoped GaAs/AlGaAs quantum well by top-gate-dependent illumination (2021)
  • Author(s): T. Fujita, R. Hayashi, M. Kohda, J. Ritzmann, A. Ludwig, J. Nitta, A. D. Wieck, and A. Oiwa
  • Journal Title: Journal of Applied Physics Volume: 129 Issue: 23 Pages: 234301-234301
  • DOI: 10.1063/5.0047558
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Intravalley scattering probed by excitation energy dependence of valley polarization in monolayer MoS₂ (2021)
  • Author(s): Asakura Eito、Odagawa Takeshi、Suzuki Masaki、Karube Shutaro、Nitta Junsaku、Kohda Makoto
  • Journal Title: Journal of Physics D: Applied Physics Volume: 54 Issue: 48 Pages: 485304-485304
  • DOI: 10.1088/1361-6463/ac1626
  • Peer Reviewed
• [Journal Article] Reliable modeling of weak antilocalization for accurate spin-lifetime extraction (2021)
  • Author(s): Kammermeier Michael、Saito Takahito、Iizasa Daisuke、Z?licke Ulrich、Kohda Makoto
  • Journal Title: Physical Review B Volume: 104 Issue: 23 Pages: 235430-235430
  • DOI: 10.1103/physrevb.104.235430
  • Peer Reviewed / Int'l Joint Research
• [Presentation] 半導体量子構造における電子スピン波と情報担体への応用 (2023)
  • Author(s): 好田 誠
  • Organizer: 第91回スピントロニクス専門研究会
  • Invited
• [Presentation] Optical generation of electron spin textures in semiconductors (2023)
  • Author(s): 石原 淳
  • Organizer: PASPS-27
  • Invited
• [Presentation] Generation of spin textures in semiconductors using vector vortex beams (2023)
  • Author(s): 石原 淳
  • Organizer: Spintronics and Quantum Transformation (Spin-QX 2023)
  • Invited
• [Presentation] Theoretical demonstration of the electron spin wave filter in semiconductor two dimensional electron gas (2023)
  • Author(s): Keito Kikuchi et al.,
  • Organizer: IEEE INTERMAG 2023
  • Int'l Joint Research
• [Presentation] Two-Step Synthesis of Spin-Helix Layered Material SnS by Physical Vapor Deposition and Nitrogen Etching View Session Detail (2023)
  • Author(s): Kazuki Koyama et al.,
  • Organizer: IEEE INTERMAG 2023
  • Int'l Joint Research
• [Presentation] Dependence of spin dynamics on spin diffusion constant in a (001) GaAs / AlGaAs quantum well (2023)
  • Author(s): Koga Akagi et al.,
  • Organizer: 2nd International Workshop of Spin/Quantum Materials and Devices (IWSQMD2023)
  • Int'l Joint Research
• [Presentation] Carrier Transfer in Monolayer WS2/Ⅲ-V Semiconductor Heterostructures (2023)
  • Author(s): Takeshi Odagawa etl a.,
  • Organizer: The 7th Symposium for the Core Research Clusters for Materials Science and Spintronics and the 6th Symposium on International Joint Graduate Program in Materials Science and Spintronics
  • Int'l Joint Research
• [Presentation] Gate-controlled persistent spin helix state in (113) GaAs/AlGaAs quantum well (2023)
  • Author(s): Taizo Kawano et al.,
  • Organizer: 2nd International Workshop of Spin/Quantum Materials and Devices (IWSQMD2023)
  • Int'l Joint Research
• [Presentation] Simulation of majority gate by drift-transported electron spin waves in a (001) GaAs/AlGaAs quantum well (2023)
  • Author(s): Kaisei Furudate et al.,
  • Organizer: The 7th Symposium for the Core Research Clusters for Materials Science and Spintronics and the 6th Symposium on International Joint Graduate Program in Materials Science and Spintronics
  • Int'l Joint Research
• [Presentation] Contrast change of quantum interference effects by gating in (001) and (113) GaAs/AlGaAs quantum wells (2023)
  • Author(s): Taizo Kawano et al.,
  • Organizer: MRM2023/IUMRS-ICA2023
  • Int'l Joint Research
• [Presentation] 半導体ナノ界面におけるスピン軌道相互作用と電子スピン波物性への展開 (2023)
  • Author(s): 好田誠
  • Organizer: 2022 年度第 1 回界面ナノ科学研究会
  • Invited
• [Presentation] Persistent spin helix state towards wave-based information processing (2023)
  • Author(s): M. Kohda
  • Organizer: International Workshop of Spin and Quantum Devices and Materials
  • Int'l Joint Research / Invited
• [Presentation] Spin-orbit interaction and persistent spin helix state in semiconductor heterostructures (2023)
  • Author(s): M. Kohda
  • Organizer: Emerging platforms for quantum computing
  • Int'l Joint Research / Invited
• [Presentation] スピン旋回状態を用いたスピン空間制御と機能開拓 (2022)
  • Author(s): 好田誠
  • Organizer: 2022年度第1回スピントロニクス研究会
  • Invited
• [Remarks] 東北大学好田研究室
  • URL: https://kohdalab-material-tohoku.jp/
• [Remarks] 好田研究室
  • URL: https://kohdalab-material-tohoku.jp/
• [Patent(Industrial Property Rights)] 電子スピン波フィルタ (2023)
  • Inventor(s): 好田誠他
  • Industrial Property Rights Holder: 好田誠他
  • Industrial Property Rights Type: 特許
  • Industrial Property Number: 2024-034940
  • Filing Date: 2023