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2014 Fiscal Year Annual Research Report

相対論的効果を用いたスピンデバイスの創製

Research Project

Project/Area Number 22226001
Research InstitutionTohoku University

Principal Investigator

新田 淳作  東北大学, 工学(系)研究科(研究院), 教授 (00393778)

Co-Investigator(Kenkyū-buntansha) 好田 誠  東北大学, 工学(系)研究科(研究院), 准教授 (00420000)
手束 展規  東北大学, 工学(系)研究科(研究院), 准教授 (40323076)
Project Period (FY) 2010-04-01 – 2015-03-31
Keywordsスピントロニクス / スピン軌道相互作用 / スピン生成 / スピン制御 / スピン検出
Outline of Annual Research Achievements

これまでの期間にスピン軌道相互作用を用いたスピン生成・制御・検出の基本要素技術を実現してきた。また、永久スピン旋回状態の電界制御による実現に成功した。H26年度はこれらのスピン要素技術を統合しスピンデバイスの実現に向けた研究を行った。
ゼーマン効果と2つのスピン軌道相互作用の作る有効磁場の競合により、半導体細線構造ではRashbaスピン軌道相互作用とDresselhausスピン軌道相互作用の比がフィッティングすることなく直接求められることを実験的に検証するとともに、永久スピン旋回状態を実現した。この結果は最終的にNatureNanotchnology誌(9巻703(2014)に掲載され、同誌のNews&Viewsの解説記事の中で紹介された。また本内容は科学新聞(2014年8月1日)にも取り上げられた。
InGaAs系半導体二次元電子ガスのヘテロ構造を最適化することにより、永久スピン旋回状態と逆永久スピン旋回状態の間をゲート電界によるスイッチングの実現に成功した。本結果は相補的スピントランジスタの実現に向けた要素技術となる。また面直磁化を有するFePt/MgO/GaAsの界面作製条件を最適化し、光学的なスピン検出とハンル効果により面直
スピン注入を確認した。
スピン軌道相互作用の強い半導体二次元電子ガスから作製したスピン生成用とスピン検出用の2つの量子ポイントコンタクト(QPC)からなる磁気フォーカス実験を行った。2つの量子コンタクトをスピン偏極させると、スピン偏極していない場合に比べ検出側のQPCに流れ込む電流が増大しスピンの検出が可能であることを示唆する実験結果を得ることに成功した。この結果は全て電気的にスピン生成・検出が可能であることを示している。

Research Progress Status

26年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

26年度が最終年度であるため、記入しない。

  • Research Products

    (36 results)

All 2015 2014 Other

All Journal Article (9 results) (of which Peer Reviewed: 8 results,  Open Access: 9 results,  Acknowledgement Compliant: 5 results) Presentation (25 results) (of which Invited: 6 results) Remarks (2 results)

  • [Journal Article] Shot Noise Induced by Nonequilibrium Spin Accumulation2015

    • Author(s)
      T. Arakawa, J. Shiogai, M. Ciorga, M. Utz, D. Schuh, M. Kohda,J. Nitta, D. Bougeard, D. Weiss, T. Ono, and K. Kobayashi
    • Journal Title

      Phys. Rev. Lett.

      Volume: 114 Pages: 016601-1 -5

    • DOI

      10.1103/PhysRevLett.114.016601

    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Layer thickness dependence of spin orbit torques and fields in Pt/Co/AlO trilayer structures2015

    • Author(s)
      T. Yang, M. Kong, M. Kohda, T. Seki, K. Takanashi, and J. Nitta
    • Journal Title

      Jpn. J. Appl. Phys.

      Volume: 54 Pages: 04DM05-1 -6

    • DOI

      10.7567/JJAP.54.04DM05

    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Comparison of electrical and optical detection of spin injection in L10-FePt / MgO / GaAs hybrid structures2015

    • Author(s)
      R. Ohsugi, J. Shiogai, Y. Kunihashi, M. Kohda, H. Sanada, T. Seki, M. Mizuguchi, H. Gotoh, K. Takanashi and J. Nitta
    • Journal Title

      J. Phys. D: Applied Physics

      Volume: 48 Pages: 164003-1 -5

    • DOI

      10.1088/0022-3727/48/16/164003

    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] STRUCTURAL, MAGNETIC AND ELECTRIC TRANSPORT PROPERTIES FOR Co2FeAl0.5Si0.5/n-GaAs JUNCTIONS2015

    • Author(s)
      N. Tezuka, T. Saito, M. Matsuura and S. Sugimoto
    • Journal Title

      Solid State Phenomena

      Volume: 50 Pages: 100-105

    • Peer Reviewed / Open Access
  • [Journal Article] 2.Direct determination of spin-orbit interaction coefficients and realization of the persistent spin helix symmetry2014

    • Author(s)
      A. Sasaki, S. Nonaka, Y. Kunihashi, M. Kohda, T. Bauernfeind, T. Dollinger, K. Richter, and J. Nitta
    • Journal Title

      Nature Nanotechnology

      Volume: 13 Pages: 703-709

    • DOI

      10.1038/NNANO.2014.128

    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Perpendicular Magnetic Anisotropy in Pt/Co/AlO Trilayer Structures Depending on AlO Thickness and Fabrication Method2014

    • Author(s)
      T. Yang, Z.Q. Wang, M. Kohda, T. Seki, K. Taknashi, and J. Nitta
    • Journal Title

      Key Engineering Materials

      Volume: 616 Pages: 247-251

    • DOI

      10.4028/www.scientific.net/KEM.616.247

    • Peer Reviewed / Open Access / Acknowledgement Compliant
  • [Journal Article] Platinum thickness dependence and annealing effect of the spin-Seebeck voltage in platinum/yttrium ion garnet structures2014

    • Author(s)
      Y. Saiga, K. Mizunuma, Y. Kono, J.-C. Ryu, H. Ono, M. Kohda, and E. Okuno
    • Journal Title

      Applied Physics Express

      Volume: 7 Pages: 093001-1 -4

    • DOI

      10.7567/APEX.7.093001

    • Peer Reviewed / Open Access
  • [Journal Article] 半導体におけるスピン軌道相互作用の新展開2014

    • Author(s)
      好田 誠、眞田 治樹
    • Journal Title

      応用物理学会誌

      Volume: 83 Pages: 200-205

    • Open Access
  • [Journal Article] Comparison of Spin Signals Between 3T Hanle and 4T Non-Local Methods for Co2Fe(Al,Si)/n-GaAs Junctions2014

    • Author(s)
      N. Tezuka, T. Saito, M. Matsuura, S. Sugimoto
    • Journal Title

      IEEE TRANSACTIONS ON MAGNETICS

      Volume: 50 Pages: 2600204-2600207

    • DOI

      10.1109/TMAG.2014.2325942

    • Peer Reviewed / Open Access
  • [Presentation] Electrical detection of the ratio of Rashba and Dresselhaus spin-orbit interaction in InGaAs/InAlAs quantum wires2015

    • Author(s)
      K.Yoshizumi, M.Kohda, J.Nitta
    • Organizer
      第62回 応用物理学会春季学術講演会
    • Place of Presentation
      東海大学(神奈川)
    • Year and Date
      2015-03-11 – 2015-03-15
  • [Presentation] Geometric control of spins in semiconductor nanostructures2015

    • Author(s)
      J. Nitta
    • Organizer
      1st International Workshop on Topological Electronics
    • Place of Presentation
      OIST(Okinawa)
    • Year and Date
      2015-03-09 – 2015-03-11
    • Invited
  • [Presentation] Gate-controlled anisotropy of spin interference induced by the competition between the k-linear and -cubic Dresselhaus terms2015

    • Author(s)
      Fumiya Nagasawa, Makoto Kohda, Junsaku Nitta
    • Organizer
      1st International Workshop on the Topological Electronics
    • Place of Presentation
      OIST(Okinawa)
    • Year and Date
      2015-03-09 – 2015-03-11
  • [Presentation] Gate-controlled ratio of Rashba and Dresselhaus spin-orbit interactions in narrow InGaAs/InAlAs wires2015

    • Author(s)
      Kohei Yoshizumi, Makoto Kohda and Junsaku Nitta
    • Organizer
      The 1st International Workshop on the Topological Electronics
    • Place of Presentation
      OIST(Okinawa)
    • Year and Date
      2015-03-09 – 2015-03-11
  • [Presentation] Direct detection of the ratio of Rashba and Dresselhaus spin-orbit interactions in InGaAs narrow wires2014

    • Author(s)
      K.Yoshizumi, M.Kohda, J.Nitta
    • Organizer
      第19回 半導体スピン工学の基礎と応用 (PASPS-19)
    • Place of Presentation
      東京大学(東京)
    • Year and Date
      2014-12-15 – 2014-12-16
  • [Presentation] Perpendicularly polarized spin injection and transport in FePt/ MgO / n-GaAs structure with optical Hanle effect measurements2014

    • Author(s)
      R. Ohsugi, J. Shiogai, M. Kohda, Y. Kunihashi, H. Sanada, T. Seki, Y. Sakuraba, M. Mizuguchi, H. Gotoh, T. Sogawa, K. Takanashi, and J. Nitta
    • Organizer
      The 19th Physics and Applications of Spin-related Phenomena in Semiconductors
    • Place of Presentation
      東京大学(東京)
    • Year and Date
      2014-12-15 – 2014-12-16
  • [Presentation] Atomic and Electronic Structures of Interfaces for Co2FeAl0.5Si0.5/n-GaAs Junctions2014

    • Author(s)
      N. Tezuka, T. Saito, M. Matsuura, S. Sugimoto
    • Organizer
      59th Conference on Magnetism and Magnetic Materials
    • Place of Presentation
      Honolulu, USA
    • Year and Date
      2014-11-03 – 2014-11-07
  • [Presentation] Semiconductor Spintronics2014

    • Author(s)
      J. Nitta
    • Organizer
      13th Spintronics Seminar and Workshop for Young Scientists
    • Place of Presentation
      グリーンピア岩沼(岩沼)
    • Year and Date
      2014-10-27 – 2014-10-29
    • Invited
  • [Presentation] Anisotropic spin-interference effect in competition between Rashba and Dresselhaus spin-orbit coupling2014

    • Author(s)
      Fumiya Nagasawa, Sirimon Tantiamornpong, Makoto Kohda, Junsaku Nitta
    • Organizer
      13th Spintronics Seminar and Workshop for Young Scientists
    • Place of Presentation
      グリーンピア岩沼(岩沼)
    • Year and Date
      2014-10-27 – 2014-10-29
  • [Presentation] Co2Fe(Al,Si)/n-GaAs接合における非局所スピンシグナル2014

    • Author(s)
      手束展規,斎藤達哉,及川楓吾,松浦昌志,杉本諭
    • Organizer
      第75回 応用物理学会秋季学術講演会
    • Place of Presentation
      北海道大学(札幌)
    • Year and Date
      2014-09-17 – 2014-09-20
  • [Presentation] Determination of spin-orbit interaction coefficients under persistent and inverse persistent spin helix states in an InGaAs/InAlAs quantum well2014

    • Author(s)
      K.Yoshizumi, A.Sasaki, M.Kohda, J.Nitta
    • Organizer
      第75回 応用物理学会秋季学術講演会
    • Place of Presentation
      北海道大学(札幌)
    • Year and Date
      2014-09-13 – 2014-09-17
  • [Presentation] Aharonov-Casher effect in competition between Rashba and Dresselhaus2014

    • Author(s)
      Fumiya Nagasawa, Makoto Kohda, Junsaku Nitta
    • Organizer
      第4回 半導体量子効果と量子情報の夏期研修会
    • Place of Presentation
      ホテルサンバレー那須(那須)
    • Year and Date
      2014-09-11 – 2014-09-13
  • [Presentation] Gate-controlled transition between persistent and inverse persistent spin helix state2014

    • Author(s)
      K.Yoshizumi, A.Sasaki, M.Kohda, J.Nitta
    • Organizer
      第4回 半導体量子効果と量子情報の夏期研修会
    • Place of Presentation
      ホテルサンバレー那須(那須)
    • Year and Date
      2014-09-11 – 2014-09-13
  • [Presentation] Thickness measurement and device fabrication of GaSe thin films toward transistors2014

    • Author(s)
      S. Takasuna, J. Shiogai, M. Kohda, J. Nitta
    • Organizer
      第4回 半導体量子効果と量子情報の夏季研修会
    • Place of Presentation
      ホテルサンバレー那須(那須)
    • Year and Date
      2014-09-11 – 2014-09-13
  • [Presentation] Temperature dependence of spin signals for Co2FeAl0.5Si0.5/n-GaAs junctions by four terminal nonlocal measurements2014

    • Author(s)
      N. Tezuka, T. Saito, M. Matsuura and S. Sugimoto
    • Organizer
      International Union of Materials Research Societies-The IUMRS International Conference in Asia 2014
    • Place of Presentation
      Fukuoka University(Fukuoka)
    • Year and Date
      2014-08-24 – 2014-08-30
  • [Presentation] Spin orbit interaction in semiconductor heterostructures2014

    • Author(s)
      M. Kohda
    • Organizer
      SPIE Nanophotonics 2014
    • Place of Presentation
      San Diego, USA
    • Year and Date
      2014-08-17 – 2014-08-21
    • Invited
  • [Presentation] Anisotropic Aharonov-Casher effect in competition between Rashba and Dresselhaus spin-orbit coupling2014

    • Author(s)
      Fumiya Nagasawa, Sirimon Tantiamornpong, Makoto Kohda, Junsaku Nitta
    • Organizer
      32nd International Conference on the Physics of Semiconductors
    • Place of Presentation
      Austin, Texas, USA
    • Year and Date
      2014-08-10 – 2014-08-15
  • [Presentation] Gate-controlled transition of persistent and inverse persistent spin helix states2014

    • Author(s)
      Kohei Yoshizumi, Atsuya Sasaki, Makoto Kohda and Junsaku Nitta
    • Organizer
      8th International Conference on Physics and Applications of Spin Phenomena in Solids
    • Place of Presentation
      Washington D.C, USA
    • Year and Date
      2014-07-28 – 2014-07-31
  • [Presentation] Optical detection of lateral spin transport in an L10-FePt / MgO /n-GaAs perpendicular spin injection device2014

    • Author(s)
      R. Ohsugi, J. Shiogai, M. Kohda, Y. Kunihashi, H. Sanada, T. Seki, Y. Sakuraba, M. Mizuguchi, H. Gotoh, T. Sogawa, K. Takanashi, and J. Nitta
    • Organizer
      PASPS VIII (8th International Conference on Physics and Applications of Spin Phenomena in Solids)
    • Place of Presentation
      Washington D.C, USA
    • Year and Date
      2014-07-28 – 2014-07-31
  • [Presentation] 半導体中のスピンはめぐる ー電界による電子スピンの回転制御ー2014

    • Author(s)
      新田 淳作
    • Organizer
      応用物理学会中国四国支部若手半導体研究会講演会
    • Place of Presentation
      島根大学(松江)
    • Year and Date
      2014-07-26 – 2014-07-27
    • Invited
  • [Presentation] 電場制御スピントロニクス2014

    • Author(s)
      新田 淳作
    • Organizer
      応用物理学会北海道支部講演会
    • Place of Presentation
      北海道大学(札幌)
    • Year and Date
      2014-07-25 – 2014-07-25
    • Invited
  • [Presentation] Thickness Dependence of Raman Spectra on GaSe Ultrathin Films2014

    • Author(s)
      S. Takasuna, J. Shiogai, M. Kohda, J. Nitta
    • Organizer
      第33回電子材料シンポジウム(EMS-33)
    • Place of Presentation
      ラフォーレ修善寺(修善寺)
    • Year and Date
      2014-07-09 – 2014-07-11
  • [Presentation] STRUCTURAL, MAGNETIC AND ELECTRIC TRANSPORT PROPERTIES FOR Co2FeAl0.5Si0.5/n-GaAs JUNCTIONS2014

    • Author(s)
      N. Tezuka, T. Saito, M. Matsuura and S. Sugimoto
    • Organizer
      Moscow International Symposium on Magnetism MISM-2014
    • Place of Presentation
      Moscow, Russia
    • Year and Date
      2014-06-29 – 2014-07-03
  • [Presentation] Stern-Gerlach type spin separation in semiconductor nanostructures2014

    • Author(s)
      M. Kohda
    • Organizer
      The 41st International Symposium on Compound Semiconductor (ISCS2014)
    • Place of Presentation
      Montpellier, France
    • Year and Date
      2014-05-11 – 2014-05-15
    • Invited
  • [Presentation] Comparison of Spin Signals Between 3T Hanle and 4T Non-Local Methods for Co2Fe(Al,Si)/n-GaAs Junctions2014

    • Author(s)
      N. Tezuka, T. Saito, M. Matsuura, S. Sugimoto
    • Organizer
      IEEE International Magnetics Conference, INTERMAG Europe
    • Place of Presentation
      Dressden, Germany
    • Year and Date
      2014-05-04 – 2014-05-08
  • [Remarks] 新田研究室新着情報

    • URL

      http://www.material.tohoku.ac.jp/~kotaib/top.html

  • [Remarks] スピン軌道相互作用の直接検出法確立

    • URL

      https://www.tohoku.ac.jp/japanese/2014/07/press20140714-01.html

URL: 

Published: 2016-06-01  

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