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室温動作スピントランジスタの創製に向けたスピン検出効率の極大化

Research Project

Project/Area Number 11J01905
Research Category

Grant-in-Aid for JSPS Fellows

Allocation TypeSingle-year Grants
Section国内
Research Field Electron device/Electronic equipment
Research InstitutionKyushu University

Principal Investigator

笠原 健司  九州大学, 大学院・システム情報科学府, 特別研究員(DC2)

Project Period (FY) 2011 – 2012
Project Status Completed (Fiscal Year 2012)
Budget Amount *help
¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 2012: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 2011: ¥700,000 (Direct Cost: ¥700,000)
Keywordsスピントロニクス / ゲルマニウム / スピン注入 / スピンMOSFET / エピタキシャル成長
Research Abstract

本研究は,次世代トランジスタとして期待されている超低消費電カスピンMOSFETの創製を目標としている.このスピンMOSFETを実現するためには、まず強磁性金属のスピン注入電極からSiGe中にスピンを注入し,そしてSiGe中を伝導してきたスピンをスピン検出電極にて検出をする必要が有る.
本年度,申請者は,高いスピン注入及び検出性能が期待される強磁性シリサイドFe,Siを用いた高品質Fe3Si/SiGe(111)界面に,δ-ドーピングと呼ばれるドーピング手法を用いて界面の電気伝導特性をチューニングすることにより,スピン注入に適切なショットキートンネル伝導を実現することに成功し,この界面を用いることにより強磁性金属/SiGe直接接合では世界で初めてSiGe中におけるスピン伝導の検出を観測することに成功した.
これまで,SiGe中におけるスピン伝導の検出は,強磁性金属/極薄絶縁体/SiGe構造を用いて実現されたものばかりであったが,この強磁性金属/極薄絶縁体/SiGe構造ではスピンMOSFET作製時に極薄絶縁膜がデバイスの抵抗を増大させるため,物理的な議論をする上では非常に役に立っているものの,実用面では不向きであった.一方,申請者の強磁性金属/SiGe直接接合構造は,強磁性体とSiGeの間に極薄絶縁体を挟まないため低抵抗化が可能であり,非常に低消費電力なデバイスの創製が期待できる.今回,本研究により強磁性金属/SiGe直接接合構造においても,SiGe中のスピン伝導を検出できたことにより,スピンMOSFETを実現する上で最も鍵となる技術が実現されたと言っても過言ではなく,この成果はスピンMOSFETを加速させる非常に重要で且つ半導体工学上,非常に意義の大きい成果であると言える.

Report

(2 results)
  • 2012 Annual Research Report
  • 2011 Annual Research Report
  • Research Products

    (27 results)

All 2012 2011

All Journal Article (8 results) (of which Peer Reviewed: 8 results) Presentation (19 results)

  • [Journal Article] Effect of the magnetic domain structure in ferromagnetic contact on spin accumulation in silicon2012

    • Author(s)
      Y. Ando, S. Yamada, K. Kasahara, K. Sawano, M. Miyao, and K. Haraaya
    • Journal Title

      Applied Physics Letters

      Volume: 101

    • Related Report
      2012 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Effect of an Atomically Matched Structure on Fermi-level Pinning at Metal/p-Ge Interfaces2012

    • Author(s)
      K. Kasahara, H. Yoshioka, S. Yamada. T. Nishimura, M. Miyao, and K. Hamaya
    • Journal Title

      ECS Transactions

      Volume: 50 Issue: 9 Pages: 223-229

    • DOI

      10.1149/05009.0223ecst

    • Related Report
      2012 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Dependence of Schottky barrier height on the junction size of bcc-metal/n-Ge(lll) contacts2012

    • Author(s)
      H. Yoshioka, K. Kasahara, T. Nishimura, S. Yamada, M. Miyao, and K Hamava
    • Journal Title

      Workshop Digest of AWAD 2012

      Pages: 238-241

    • Related Report
      2012 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Spin accumulation created electrically in an n-type germanium channel using Schottky tunnel contacts2012

    • Author(s)
      K.Kasahara, Y.Baba, K.Yamane, Y.Ando, S.Yamada, Y.Hoshi, K.Sawano, M.Miyao, K.Hamaya
    • Journal Title

      J.Appl.Phys.

      Volume: 111 Issue: 7

    • DOI

      10.1063/1.3670985

    • Related Report
      2011 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Temperature evolution of spin accumulation detected electrically in a nodegenerated silicon channel2012

    • Author(s)
      Y.Ando, K.Kasahara, S.Yamada, Y.Maeda, K.Masaki, Y.Hoshi, K.Sawano, M.Miyao, K.Hamaya
    • Journal Title

      Phys.Rev.B

      Volume: 85 Issue: 3 Pages: 35320-35320

    • DOI

      10.1103/physrevb.85.035320

    • Related Report
      2011 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Mechanism of Fermi Level Pinning at metal/germanium interfaces2011

    • Author(s)
      K.Kasahara, S.Yamada, K.Sawano, M.Miyao, K.Hamaya
    • Journal Title

      Phys.Rev.B

      Volume: 84 Issue: 20 Pages: 205301-205301

    • DOI

      10.1103/physrevb.84.205301

    • Related Report
      2011 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Electric-field control of spin accumulation signals in silicon at room temperature2011

    • Author(s)
      Y.Ando, et.al.
    • Journal Title

      Applied Physics Letters

      Volume: 99 Issue: 13 Pages: 132511-132511

    • DOI

      10.1063/1.3643141

    • Related Report
      2011 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Bias current dependence of spin accumulation signals in a silicon channel detected by a Schottky tunnel contact2011

    • Author(s)
      Y.Ando, et.al.
    • Journal Title

      Applied Physics Letters

      Volume: 99 Issue: 1

    • DOI

      10.1063/1.3607480

    • Related Report
      2011 Annual Research Report
    • Peer Reviewed
  • [Presentation] Room-temperature detection of the spin-accumulation signals in a Si-MOSFET structure2012

    • Author(s)
      K.Masaki, Y.Ando, Y.Maeda, K.Kasahara, S.Yamada, Y.Hoshi, K.Sawano, M.Miyao, K.Hamaya
    • Organizer
      The 38th Special Meeting of Special Session for Spintronics
    • Place of Presentation
      Osaka
    • Year and Date
      2012-01-20
    • Related Report
      2011 Annual Research Report
  • [Presentation] Electrical creation and detection of the spin accumulation in an n-Gechannel using Schottky tunnel contacts2012

    • Author(s)
      G.Takemoto, Y.Baba, K.Kasahara, S.Yamada, Y.Hoshi, K.Sawano, M.Miyao, K.Hamaya
    • Organizer
      The 38th Special Meeting of Special Session for Spintronics
    • Place of Presentation
      Osaka
    • Year and Date
      2012-01-20
    • Related Report
      2011 Annual Research Report
  • [Presentation] Marked suppression of the Fermi-level pinning at metal/Ge(111) junctions with atomically matched interfaces2012

    • Author(s)
      K. Kasahara, S. Yamada, M. Miyao, and K. Hamaya
    • Organizer
      Materials Research Society 2012
    • Place of Presentation
      California
    • Related Report
      2012 Annual Research Report
  • [Presentation] Room-temperature spin injection into Si in a metal-oxide-semiconductor field effect transistor structure with a high-quality Schottky-tunnel contact2012

    • Author(s)
      Y. Ando, K. Masaki, K. Kasahara, S. Yamada, Y. Hoshi, K. Sawano, M. Miyao, and K. Hamaya
    • Organizer
      Materials Research Society 2012
    • Place of Presentation
      California
    • Related Report
      2012 Annual Research Report
  • [Presentation] Dependence of Schottky barrier height on the junction size of bcc-metal/n-Ge(111) contacts2012

    • Author(s)
      H. Yoshioka, K. Kasahara, T. Nishimura, S. Yamada, M. Miyao and K Hamava
    • Organizer
      AWAD 2012
    • Place of Presentation
      Okinawa
    • Related Report
      2012 Annual Research Report
  • [Presentation] Room temperature detection of spin accumulation created in n-Ge through Schottky tunnel contacts2012

    • Author(s)
      G. Takemoto, Y. Baba, Y. Fujita, S. Yamada, K. Kasahara, Y. Hoshi, K. Sawano, M. Miyao, and K. Hatnaya,
    • Organizer
      PASPS-VI12012, The 7th International Conference on Physics and Applications of Spin-related Phenomena in Semiconductors
    • Place of Presentation
      Netherlands
    • Related Report
      2012 Annual Research Report
  • [Presentation] Effect of an atomically matched structure on Fermi-level pinning at CoFe/p-Ge interfaces2012

    • Author(s)
      H. Yoshioka, K. Kasahara, T. Nishimura, S. Yamada, M. Miyao and K. Hamava
    • Organizer
      IUMRS―ICEM2012
    • Place of Presentation
      Yokohama
    • Related Report
      2012 Annual Research Report
  • [Presentation] Effect of an atomically matched structure on Fermi-level pinning at metal/p-Ge interfaces2012

    • Author(s)
      K. Kasahara, H. Yoshioka, S. Yamada, T. Nishimura, M. Miyao,, and K. Hamaya
    • Organizer
      PRiME 2012, ECS Pacific RIM Meeting 2012
    • Place of Presentation
      Hawaii
    • Related Report
      2012 Annual Research Report
  • [Presentation] Marked Suppression of the Fermi-level Pinning at Atomically Marked Fe_3Si/p-Ge(111) Contacts2011

    • Author(s)
      K.Kasahara, S.Yamada, M.Miyao, K.Hamaya
    • Organizer
      2011 International Conference on Solid State devices and Materials
    • Place of Presentation
      Nagoya
    • Related Report
      2011 Annual Research Report
  • [Presentation] Suppression of Fermi-level pinning at atomically controlled Fe3Si/p-Ge(111) junctions2011

    • Author(s)
      K.Kasahara, K.Yamane, Y.Baba, M.Miyao, K.Hamaya
    • Organizer
      7th International Conference on Si Epitaxy and Heterostructures
    • Place of Presentation
      Leuven, Belgium
    • Related Report
      2011 Annual Research Report
  • [Presentation] Electrical detection of spin accumulation in Ge through a Schottky tunnel barrier2011

    • Author(s)
      K.Kasahara, Y.Baba, K.Yamane, Y.Ando, Y.Hoshi, K.Sawano, M.Miyao, K.Hamaya
    • Organizer
      SPINTECH-6
    • Place of Presentation
      Matsue
    • Related Report
      2011 Annual Research Report
  • [Presentation] Electrical creation of spin accumulation in a Si channel using a Schottky tunnel contact2011

    • Author(s)
      Y.Ando, Y.Maeda, K.Kasahara, S.Yamada, M.Miyao, K.Hamaya
    • Organizer
      56th Annual Conference on Magnetism and Magnetic Materials
    • Place of Presentation
      Arizona, U.S.A
    • Related Report
      2011 Annual Research Report
  • [Presentation] Spin accumulation created electrically in an n-Ge channel using Schottky tunnel contacts2011

    • Author(s)
      Y.Baba, K.Kasahara, K.Masaki, Y.Ando, Y.Hoshi, K.Sawano, M.Miyao, K.Hamaya
    • Organizer
      56th Annual Conference on Magnetism and Magnetic Materials
    • Place of Presentation
      Arizona, U.S.A
    • Related Report
      2011 Annual Research Report
  • [Presentation] Electrical detection of spin accumulation in silicon through a Schottky tunnel barrier2011

    • Author(s)
      Y.Ando, K.Kasahara, K.Yamane, Y.Baba, Y.Maeda, Y.Hoshi, K.Sawano, M.Miyao, K.Hamaya
    • Organizer
      SPINTECH-6
    • Place of Presentation
      Matsue
    • Related Report
      2011 Annual Research Report
  • [Presentation] Three-terminal spin detection in Ge through a Schottky tunnel barrier2011

    • Author(s)
      Y.Baba, K.Kasahara, K.Yamane, Y.Ando, Y.Hoshi, K.Sawano, M.Miyao, K.Hamaya
    • Organizer
      5th International Workshop on Spin Currents
    • Place of Presentation
      Sendai
    • Related Report
      2011 Annual Research Report
  • [Presentation] Hanle measurements for accumulated spins in a silicon channel using a Schottky tunnel contact2011

    • Author(s)
      Y.Ando, K.Kasahara, Y.Yamane, Y.Baba, Y.Maeda, Y.Hoshi, K.Sawano, M.Miyao, K.Hamaya
    • Organizer
      5th International Workshop on Spin Currents
    • Place of Presentation
      Sendai
    • Related Report
      2011 Annual Research Report
  • [Presentation] Electrical detection of spin accumulation in Si with a high-quality CoFe/Si Schottky tunnel contact2011

    • Author(s)
      Y.Maeda, Y.Ando, K.Kasahara, Y.Baba, M.Miyao, K.Hamaya
    • Organizer
      2011 International Workshop on Advanced Electrical Engineering and Related Topics
    • Place of Presentation
      Bochum, Germany
    • Related Report
      2011 Annual Research Report
  • [Presentation] n-Ge中に生成されたスピン蓄積の検出2011

    • Author(s)
      馬場雄三, 笠原健司, 真崎紘平, 安藤裕一郎, 星裕介, 澤野憲太郎, 宮尾正信, 浜屋宏平
    • Organizer
      35回日本磁気学会学術講演会
    • Place of Presentation
      新潟
    • Related Report
      2011 Annual Research Report
  • [Presentation] 三端子Hanle効果測定法を用いたSi中のスピン蓄積の検出2011

    • Author(s)
      真崎紘平, 安藤裕一郎, 前田雄也, 笠原健司, 星裕介, 澤野憲太郎, 宮尾正信, 浜屋宏平
    • Organizer
      35回日本磁気学会学術講演会
    • Place of Presentation
      新潟
    • Related Report
      2011 Annual Research Report

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Published: 2011-12-12   Modified: 2024-03-26  

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