• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

スピントロニクス物性研究調整班

Research Project

Project/Area Number 14076102
Research Category

Grant-in-Aid for Scientific Research on Priority Areas

Allocation TypeSingle-year Grants
Review Section Science and Engineering
Research InstitutionThe University of Tokyo

Principal Investigator

勝本 信吾  東京大学, 物性研究所, 教授 (10185829)

Co-Investigator(Kenkyū-buntansha) 藤森 淳  東京大学, 大学院・新領域創成科学研究科, 教授 (10209108)
瀧田 宏樹  筑波大学, 物質工学系, 教授 (00011213)
松本 祐司 (松本 裕司)  東京工業大学, フロンティア創造共同研究センター, 講師 (60302981)
吉野 淳二  東京工業大学, 大学院・理工学研究科, 教授 (90158486)
Project Period (FY) 2002 – 2005
Project Status Completed (Fiscal Year 2005)
Budget Amount *help
¥15,700,000 (Direct Cost: ¥15,700,000)
Fiscal Year 2005: ¥4,500,000 (Direct Cost: ¥4,500,000)
Fiscal Year 2004: ¥4,600,000 (Direct Cost: ¥4,600,000)
Fiscal Year 2003: ¥4,300,000 (Direct Cost: ¥4,300,000)
Fiscal Year 2002: ¥2,300,000 (Direct Cost: ¥2,300,000)
Keywordsスピンエレクトロニクス / セラミックス / トンネル現象 / メゾスコピック系 / 量子ドット / Fano効果 / 近藤効果 / 希薄磁性半導体 / 磁気円二色性 / キャリア抑制強磁性 / 二重交換相互作用 / 電界効果デバイス / ファノ効果 / 室温強磁性 / 超平坦表面 / 量子ホール効果 / 再構成表面 / トンネル磁気抵抗 / 高温強磁性 / コンビナトリアル手法 / スピン偏極正孔
Research Abstract

勝本グループでは,量子ドットの近藤状態が,特定の干渉計の中で干渉を生じる際に起こるFano近藤効果を,T結合型の量子ドットおよびABリング中に量子ドットを埋め込んだ系において観測した.ABリングの系においては,磁場によって干渉パラメーターを変化させて,あらゆるパラメーターの領域でπ/2へのロックが生じていることを確認した.また,(Ga,Mn)AsからのTHz発光を発見した.
松本グループでは酸素圧変調方式を用いてCo:TiO2/TiO2人工格子の界面キャリア注入に成功し,これをXMCDで確認した.
瀧田グループでは,(Zn,Cr)Teにおけるドーピング効果を明らかにし,室温強磁性発現に成功すると共に,そのメカニズムについても重要な知見を得た.
藤森グループでは,XMCDの手法を駆使し,本調整班他グループとの共同研究で,これまで疑問とされてきた,Co:TiO2やCo:ZnO,また(Ga,Mn)Nの磁性が間違いなく希薄磁性であることを証明した.
吉野グループでは,(Ga,Mn)Asの2重障壁構造において電流注入による磁化反転を試み,記録的な低電流閾値での磁化反転に成功した.

Report

(4 results)
  • 2005 Annual Research Report
  • 2004 Annual Research Report
  • 2003 Annual Research Report
  • 2002 Annual Research Report
  • Research Products

    (30 results)

All 2006 2005 2004 Other

All Journal Article (17 results) Book (1 results) Publications (12 results)

  • [Journal Article] Crystal-Face Dependences of Surface Band Edges and Hole Reactivity, Revealed by Preparation of Essentially Atomically Smooth and Stable (110) and (100) n-TiO2 (Rutile) Surfaces2005

    • Author(s)
      Ryuhei Nakamura, Naomichi Ohashi, Akihito Imanishi, Takeo Osawa, Yuji Matsumoto, Hideomi Koinuma, Yoshihiro Nakato
    • Journal Title

      J.Phys.Chem.B(Lett.) 109

      Pages: 1648-1651

    • Related Report
      2005 Annual Research Report
  • [Journal Article] C-axis oriented epitaxial Ru (Eu1.5Ce0.5)Sr2Cu2O10-d thin films grown by flux-mediated solid phase epitaxy2005

    • Author(s)
      W.Q.Lu, Y.Yamamoto, V.V.Peyrykin, M.Kakihana, Y.Matsumoto, U.S.Joshi, H.Koinuma, T.Hasegawa
    • Journal Title

      Thin Solid Film 486

      Pages: 79-81

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Flux-assisted Reactive Solid Phase Epitaxy of highly c-Axis oriented Ru Ru (Eu1.5Ce0.5)Sr2Cu2O10-d Thin films2005

    • Author(s)
      W.Q.Lu, Y.Yamamoto, V.V.Peyrykin, M.Kakihana, K.Shibuya, M.Lippmaa, Y.Matsumoto, H.Koinuma
    • Journal Title

      Physica C 422

      Pages: 46-50

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Magnetic behaviors of ferromagnetic semiconductor Zn1-xCrxTe grown by MBE2005

    • Author(s)
      N.Ozaki, N.Nishizawa, S.Marcet.S.Kuroda, K.Takita
    • Journal Title

      J.Supercond. : Incorporating Novel Magnetism 18

      Pages: 29-32

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Spin relaxation in CdTe quantum dots2005

    • Author(s)
      Y.Chen, T.Okuno, Y.Masumoto, Y.Terai, S.Kuroda, K.Takita
    • Journal Title

      Physical Review B 71

      Pages: 33314-33314

    • NAID

      120007138966

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Real-time observation of charged exciton drift in modulation-doped (Cd,Mn)Te quantum well2005

    • Author(s)
      F.Takano, T.Tokizaki, H.Akinaga, S.Kuroda, K.Takita
    • Journal Title

      Physical Review B 71

      Pages: 125326-125326

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Suppression of ferromagnetism due to hole doping in Znl-xCrxTe grown by molecular beam epitaxy2005

    • Author(s)
      N.Ozaki, I.Okabayashi, T.Kumekawa, N.Nishizawa, S.Marcet, S.Kuroda, K.Takita
    • Journal Title

      Applied Physics Letters 87

      Pages: 192116-192116

    • Related Report
      2005 Annual Research Report
  • [Journal Article] High-Energy Spectroscopic Study of the III-V Nitride-Based Diluted Magnetic Semiconductor Gal-xMnxN2005

    • Author(s)
      J.I.Hwang, Y.Ishida, M.Kobayashi, H.Hirata, K.Takubo, T.Mizokawa, A.Fujimori, J.Okamoto, K.Mamiya, Y.Saito, Y.Muramatsu, H.Ott, A.Tanaka, T.Kondo, H.Munekata
    • Journal Title

      Physical Review B 72

      Pages: 85216-85216

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Characterization of Magnetic Components in the Diluted Magnetic Semiconductor Znl-xCoxO by X-ray Magnetic Circular Dichroism2005

    • Author(s)
      M.Kobayashi, Y.Ishida, J.I.Hwang, T.Mizokawa, A.Fujimori, J.Okamoto, K.Mamiya, Y.Takeda, T.Okane, Y.Saitoh, Y.Muramatsu, A.Tanaka, H.Saeki, H.Tabata, T.Kawai
    • Journal Title

      Physical Review B 72

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Observation of the Fano-Kondo Antiresonance in a Quantum Wire with a Side-Coupled Quantum Dot2005

    • Author(s)
      Masahiro Sato, Hisashi Aikawa, Kensuke Kobayashi, Shingo Katsumoto, Yasuhiro Iye
    • Journal Title

      Physical Review Letters 95

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Direct observation of a neutral Mn acceptor in Gal-xMnxAs by resonant x-ray emission spectroscopy2005

    • Author(s)
      Y.Ishiwata,..., S.Katsumoto, et al.
    • Journal Title

      Physical Review B 71

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Observation of "Partial Coherence" in an Aharonov-Bohm Interferometer with a Quantum Dot2004

    • Author(s)
      H.Aikawa, K.Kobayashi, A.Sano, S.Katsumoto, Y.Iye
    • Journal Title

      Physical Review Letters 92

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Density Dependent Electronic Structure of the Zinc-Blende-Type MnAs Dots on GaAs(100) Studied by in situ Photoemission Spectroscopy2004

    • Author(s)
      J.Okabayashi, et al.
    • Journal Title

      Physical Review B 70

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Interference effect in multi-level transport through a quantum dot2004

    • Author(s)
      H.Aikawa, K.Kobayashi, A.Sano, S.Katsumoto, Y.Iye
    • Journal Title

      Journal of the Physical Society of Japan 73

      Pages: 3235-3238

    • NAID

      110001979285

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Photoemission study of the Ferromagnetic Diluted Magnetic Semiconductor Zn_<1-x>V_xO2004

    • Author(s)
      Y.Ishida et al.
    • Journal Title

      Physica B 351

      Pages: 304-307

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Cobalt valence states and origins of ferromagnetism in Co doped TiO_2 rutile thin films2004

    • Author(s)
      M.Murakarni et al.
    • Journal Title

      Journal of Applied Physics 95

      Pages: 5330-5333

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Magnetic and structural properties of MBE-grown Zn_<1-x>Cr_xTe2004

    • Author(s)
      N.Ozaki, N.Nishizawa, S.Kuroda, K.Takita
    • Journal Title

      Journal of Physics : Condensed Matter 16

    • Related Report
      2004 Annual Research Report
  • [Book] 超伝導・超流動2006

    • Author(s)
      勝本信吾, 河野公俊
    • Total Pages
      141
    • Publisher
      岩波書店
    • Related Report
      2005 Annual Research Report
  • [Publications] T.Makino, Y.Segawa, M.Kawasaki, Y.Matsumoto, H.Koinuma, M.Murakami, R.Takahashi: "Temperature Dependence of Absorption Spectra in Anatase TiO2 Epilayers"Journal of the Physical Society of Japan. 72. 2696-2697 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] F.Takano, H.Akinaga, T.Tokizaki, S.Kuroda, K.Takita: "Spatial di.usion of excitons in n-type modulation-doped (Cd,Mn)Te/(Cd,Mg)Te single quantumwells under magnetic fields"Applied Physics Letters. 83. 2853-2855 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] S.Kuroda, E.Bellet-Amalric, R.Giraud, S.Marcet, J.Cibert, H.Mariette: "Strong influence of Ga/N flux ratio on Mn incorporation into Ga_<1.x>Mn_xN epilayers grown by plasma-assisted MBE"Applied Physics Letters. 83. 4580-4582 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Y.Ishida et al.: "In situ photoemission study of the room- temperature ferromagnet ZnGeP_2 : Mn"Physical Review Letters. 91. 107202-1-107202-4 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] K.Sato et al.: "Novel Mn-doped chalcopyrites"Journal of Physics and Chemistry in Solids. 64. 1461-1465 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] H.Aikawa, K.Kobayashi, Katsumoto, Y.Iye: "Observation of "Partial Coherence" in an Aharonov-Bohm Interferometer with a Quantum Dot"Physical Review Letters. (to be published).

    • Related Report
      2003 Annual Research Report
  • [Publications] K.Kobayashi, H.Aikawa, S.Katsumoto, Y.Iye: "Tuning of the Fano Effect through Quantum Dot in an Aharonov-Bohm Interferometer"Physical Review Letters. 88. 25686 1-25686 4 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] K.Kobayashi, H.Aikawa, S.Katsumoto, Y.Iye: "Observation of an enhanced Aharonov-Bohm effect"Journal of Physics and Chemistry of Solids. 63. 1301-1305 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] T.Hayashi, Y.Hashimoto, S.Katsumoto, Y.Iye: "Metal-insulator transition in (Ga,Mn)As"Journal of Physics and Chemistry of Solids. 63. 1315-1318 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] K.Kobayashi, H.Aikawa, S.Katsumoto, Y.Iye: "Probe-Configuration-Dependent Decoherence in an Aharonov-Bohm Ring"Journal of the Physical Society of Japan. 71. 2094-2097 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] K.Hirakawa, S.Katsumoto, T.Hayashi, Y.Hashimoto, Y.Iye: "Double-exchange-like interaction in Ga_<1-x>Mn_xAs investigated by infrared absorption spectroscopy"Physical Review B. 65. 193312 1-193312 4 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Y.Ishiwata, et al.: "Manganese concentration and low-temperature annealing dependence of Ga_<1-x>Mn_xAs by x-ray absorption spectroscopy"Physical Review B. 65. 233201 1-233201 4 (2002)

    • Related Report
      2002 Annual Research Report

URL: 

Published: 2002-04-01   Modified: 2018-03-28  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi