Study on spin transport physics in Ge

2016 Fiscal Year Annual Research Report

• Project/Area Number: 16F16064
• Research Institution: Kyoto University
• Principal Investigator: 白石 誠司 京都大学, 工学研究科, 教授 (30397682)
• Co-Investigator(Kenkyū-buntansha): DUSHENKO SERGEY 京都大学, 工学研究科, 外国人特別研究員
• Project Period (FY): 2016-04-22 – 2018-03-31
• Keywords: ゲルマニウム / スピン注入 / スピン輸送 / スピントランジスタ

Outline of Annual Research Achievements

初年度である28年度は、ゲルマニウムへの安定かつ効率的スピン注入に必要なMgOトンネル絶縁膜の成長のためにMBE装置の立ち上げと条件出しを行った。また、従来になかった新構造としてゲルマニウムスピンチャネル面を電気的に孤立させた新構造基板を共同研究先であるWarwick大グループと開発し、入手した。スピン注入実験には至っていないが、それへの重要な要素技術開発などは順調に遂行された。

Current Status of Research Progress

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

Reason

ゲルマニウムスピントランジスタの作製に向けた要素技術の開発と実験環境の整備は順調に進行している。また素子構造の最適化も終了している。

Strategy for Future Research Activity

トンネル絶縁膜成長と、ゲルマニウムスピンチャネル面に垂直なスピン量子化軸を持つスピン注入のための垂直磁化膜成長の最適化を同時に進め、スピンバルブ素子の電気的特性を確認しながらスピン注入実験を行っていく。

Research Products

• [Journal Article] Quantitative investigation of the inverse Rashba-Edelstein effect in Bi/Ag and Ag/Bi on YIG (2017)
  • Author(s): M. Matsushima, Y. Ando, S. Dushenko, R. Ohshima, R. Kumamoto, T. Shinjo, and M. Shiraishi
  • Journal Title: Appl. Phys. Lett Volume: 110 Pages: 072404
  • DOI: http://dx.doi.org/10.1063/1.4976691
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Gate-Tunable Spin-Charge Conversion and the Role of Spin-Orbit Interaction in Graphene (2016)
  • Author(s): S. Dushenko, H. Ago, K. Kawahara, T. Tsuda, S. Kuwabata, T. Takenobu, T. Shinjo, Y. Ando, and M. Shiraishi
  • Journal Title: Phys. Rev. Lett. Volume: 116 Pages: 166102
  • DOI: http://dx.doi.org/10.1103/PhysRevLett.116.166102
  • Peer Reviewed
• [Journal Article] Significant reduction in spin pumping efficiency in a platinum/yttrium iron garnet bilayer at low temperature (2016)
  • Author(s): E. Shigematsu, Y. Ando, R. Ohshima, S. Dushenko, Y. Higuchi, T. Shinjo, H. J. von Bardeleben, and M. Shiraishi
  • Journal Title: Appl. Phys. Express Volume: 9 Pages: 053002
  • DOI: http://doi.org/10.7567/APEX.9.053002
  • Peer Reviewed
• [Presentation] 単結晶Biを用いたスピン流－電流変換 (2017)
  • Author(s): M. Matsushima, Y. Ando, S. Dushenko, T. Kawabe, T. Shinjo, S. Miwa, and M. Shiraishi
  • Organizer: The Physical Society of Japan (JPS) 72nd Annual Meeting 2017 (Spring)
  • Place of Presentation: Osaka, Japan
  • Year and Date: 2017-03-20
• [Presentation] Pt薄膜中における逆スピンホール効果のゲート電圧依存性 (2017)
  • Author(s): M. Hokazono, Y. Ando, S. Dushenko, T. Shinjo, and M. Shiraishi
  • Organizer: The Physical Society of Japan (JPS) 72nd Annual Meeting 2017 (Spring)
  • Place of Presentation: Osaka, Japan
  • Year and Date: 2017-03-20
• [Presentation] ESRキャビティにおけるYIG薄膜中の熱的スピン波輸送 (2017)
  • Author(s): E. Shigematsu, Y. Ando, S. Dushenko, T. Shinjo, and M. Shiraishi
  • Organizer: The Physical Society of Japan (JPS) 72nd Annual Meeting 2017 (Spring)
  • Place of Presentation: Osaka, Japan
  • Year and Date: 2017-03-17
• [Presentation] Spin to charge conversion in single-crystal bismuth (2017)
  • Author(s): M. Matsushima, Y. Ando, S. Dushenko, T. Kawabe, T. Shinjo, S. Miwa, and M. Shiraishi
  • Organizer: “Nano Spin Conversion Science” 2017 meeting (Spring)
  • Place of Presentation: Tokyo, Japan
  • Year and Date: 2017-03-02
• [Presentation] Gate-controlled spin-charge conversion in single-layer graphene (2017)
  • Author(s): S. Dushenko
  • Organizer: The magnetics Society of Japan special session “The 62nd Spin Electronics Research Meeting”
  • Place of Presentation: Kyoto, Japan
  • Year and Date: 2017-01-13
  • Invited
• [Presentation] 単結晶Bi における逆スピンホール効果 (2016)
  • Author(s): M. Matsushima, Y. Ando, S. Dushenko, T. Kawabe, T. Shinjo, S. Miwa, and M. Shiraishi
  • Organizer: 21st Physics and Applications of Spin-related Phenomena in Semiconductors (PASPS-21)
  • Place of Presentation: Sapporo, Japan
  • Year and Date: 2016-12-12
• [Presentation] Spin-charge Conversion in Graphene and Carbon Nanotube (2016)
  • Author(s): Y. Ando, S. Dushenko, and M. Shiraishi
  • Organizer: Booklet of Abstracts 2016 Workshop on Innovative Nanoscale Devices and Systems (WINDS)
  • Place of Presentation: Hawaii, USA
  • Year and Date: 2016-12-05
  • Int'l Joint Research
• [Presentation] Gate control over spin-charge conversion in single-layer graphene (2016)
  • Author(s): S. Dushenko
  • Organizer: Joint Kyoto University - Victoria University of Wellington Workshop 2016 “Science, Engineering and Applications of Electric and Electronic Materials”
  • Place of Presentation: Wellington, New Zealand
  • Year and Date: 2016-11-22
  • Int'l Joint Research / Invited
• [Presentation] Spin-charge conversion in graphene under gate voltage application (2016)
  • Author(s): S. Dushenko
  • Organizer: Recent Progress in Spintronics of 2D Materials
  • Place of Presentation: Hsinchu, Taiwan
  • Year and Date: 2016-11-15
  • Int'l Joint Research / Invited
• [Presentation] Gate-Tunable Spin-Charge Conversion and a Role of Spin-Orbit Interaction in Graphene (2016)
  • Author(s): S. Dushenko
  • Organizer: Abstracts of 61st Annual Conference on Magnetism and Magnetic Materials
  • Place of Presentation: New Orleans, USA
  • Year and Date: 2016-11-03
  • Int'l Joint Research / Invited
• [Presentation] Investigation of spin to charge conversion at Bi/Ag interface on yttrium iron garnet (2016)
  • Author(s): M. Matsushima, S. Dushenko, R. Ohshima, Y. Ando, T. Shinjo and M. Shiraishi
  • Organizer: 61st Annual Conference on Magnetism and Magnetic Materials
  • Place of Presentation: New Orleans, USA
  • Year and Date: 2016-11-03
  • Int'l Joint Research
• [Presentation] A role of impurity- and phonon-induced momentum scattering to spin lifetime in degenerate Si (2016)
  • Author(s): S. Lee, N. Yamashita, S. Dushenko, Y. Ando, H. Koike and M. Shiraishi
  • Organizer: 61st Annual Conference on Magnetism and Magnetic Materials
  • Place of Presentation: New Orleans, USA
  • Year and Date: 2016-11-03
  • Int'l Joint Research
• [Presentation] Graphene spin-charge converter controlled by gate voltage (2016)
  • Author(s): S. Dushenko, H. Ago, K. Kawahara, T. Tsuda, S. Kuwabata, T. Takenobu, T. Shinjo, Y. Ando, M. Shiraishi
  • Organizer: International Workshop on Nano Spin Conversion Science & Quantum Spin Dynamics
  • Place of Presentation: The University of Tokyo, Tokyo, Japan
  • Year and Date: 2016-10-13
  • Int'l Joint Research
• [Presentation] Observation of room-temperature spin transport and spin relaxation in highly doped n-type Germanium (2016)
  • Author(s): S. Dushenko, M. Koike, Y. Ando, T. Shinjo, M. Myronov, and M. Shiraishi
  • Organizer: JEMS2016
  • Place of Presentation: Glasgow, United Kingdom
  • Year and Date: 2016-08-25
  • Int'l Joint Research
• [Presentation] Gate voltage-controlled spin-charge conversion in single-layer graphene (2016)
  • Author(s): S. Dushenko, H. Ago, K. Kawahara, T. Tsuda, S. Kuwabata, T. Takenobu, T. Shinjo, Y. Ando, M. Shiraishi
  • Organizer: 9th International Conference on Physics and Applications of Spin-Related Phenomena in Solids
  • Place of Presentation: Kobe, Japan
  • Year and Date: 2016-08-10
  • Int'l Joint Research
• [Presentation] Investigation of the inverse Rashba-Edelstein effect in Bi/Ag/YIG and Ag/Bi/YIG (2016)
  • Author(s): M. Matsushima, S. Dushenko, R. Ohshima, Y. Ando, T. Shinjo, M. Shiraishi
  • Organizer: 9th International Conference on Physics and Applications of Spin-Related Phenomena in Solids
  • Place of Presentation: Kobe, Japan
  • Year and Date: 2016-08-10
  • Int'l Joint Research
• [Presentation] Spin charge conversion in Bi/Ag/YIG and Ag/Bi/YIG (2016)
  • Author(s): M. Matsushima, S. Dushenko, R. Ohshima, Y. Ando, T. Shinjo, and M. Shiraishi
  • Organizer: “Nano Spin Conversion Science” Workshop in Kansai for Young Researchers
  • Place of Presentation: Osaka University Toyonaka Campus
  • Year and Date: 2016-04-15
• [Presentation] Comparison of spin-charge-conversion efficiency between Bi and Bi85Sb15 (2016)
  • Author(s): R. Kumamoto, Y. Ando, S. Dushenko, T. Shinjo and M. Shiraishi
  • Organizer: “Nano Spin Conversion Science” Workshop in Kansai for Young Researchers
  • Place of Presentation: Osaka University Toyonaka Campus
  • Year and Date: 2016-04-15
• [Presentation] Negative spin Hall angle in metallic and semiconducting single-walled carbon nanotube mats (2016)
  • Author(s): E. Shigematsu, H. Nagano, S. Dushenko, Y. Ando, T. Tsuda, S. Kuwabata, T. Takenobu, T. Tanaka, H. Kataura, T. Shinjo, and M. Shiraishi
  • Organizer: “Nano Spin Conversion Science” Workshop in Kansai for Young Researchers
  • Place of Presentation: Osaka University Toyonaka Campus
  • Year and Date: 2016-04-15
• [Presentation] Temperature evolution of spin pumping efficiency in platinum/yttrium iron garnet (2016)
  • Author(s): E. Shigematsu, Y. Ando, R. Ohshima, S. Dushenko, Y. Higuchi, T. Shinjo, H. J. von Bardeleben, and M. Shiraishi
  • Organizer: “Nano Spin Conversion Science” Workshop in Kansai for Young Researchers
  • Place of Presentation: Osaka University Toyonaka Campus
  • Year and Date: 2016-04-15
• [Presentation] Experimental determination of spin-charge conversion mechanism in single-layer graphene (2016)
  • Author(s): S. Dushenko
  • Organizer: “Nano Spin Conversion Science” Workshop in Kansai for Young Researchers
  • Place of Presentation: Osaka University Toyonaka Campus
  • Year and Date: 2016-04-15
• [Remarks] グラフェン・スピントロニクス：スピン電荷変換を支配するのは？
  • URL: http://www.nature.com/nnano/reshigh/2016/0616/full/nnano.2016.103.html
• [Remarks] 次世代スピントロニクス材料であるグラフェンにおいてスピンを電圧に変換する新しい機能を発見
  • URL: http://www.kyoto-u.ac.jp/ja/research/research_results/2016/160426_2.html