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二十面体構造のホウ素系物質による超伝導探索

Research Project

Project/Area Number 20045009
Research Category

Grant-in-Aid for Scientific Research on Priority Areas

Allocation TypeSingle-year Grants
Review Section Science and Engineering
Research InstitutionOsaka University

Principal Investigator

白井 光雲  Osaka University, 産業科学研究所, 准教授 (60178647)

Project Period (FY) 2008 – 2009
Project Status Completed (Fiscal Year 2009)
Budget Amount *help
¥2,600,000 (Direct Cost: ¥2,600,000)
Fiscal Year 2009: ¥1,300,000 (Direct Cost: ¥1,300,000)
Fiscal Year 2008: ¥1,300,000 (Direct Cost: ¥1,300,000)
Keywords超伝導材料 / マテリアルデサイン / ドーピング / 半導体材料 / 第一原理計算 / マテリアルデザイン
Research Abstract

1) ホウ素の高圧での物質探索と超伝導
高圧での超伝導の発見が引きがねとなりホウ素の高圧での構造探索が行われるようになったが。最近までホウ素の相図は知られていなかった。我々はホウ素の相図を初めて理論的に予測した。高圧でα相が安定であることが示され、それに基づき高圧での超伝導実験が、共同研究者により行われついに超伝導の発見に至っている。高圧での金属化の機構を理論的に明らかにした。そして従来相転移が起きていると予測されていたが実はそうでないことを明らかにし、従来の説を覆した。さらに、グラファイトや炭化ホウ素といった物質も高圧で超伝導が出現する可能性があり、高圧での金属化、あるいは伝導度の研究を行った。またダイヤモンド構造のBC_5の作成には高圧が用いられているが、この作成のため条件を明らかにした。
2) 高圧を利用したドーピング法
α相ホウ素にLiをドープすることで高T_c超伝導が期待されているが、Liを適当な量でドープすることが難しい。その困難点を高圧ドーピング法で解決することを理論的に提唱した。この高圧ドーピング法のアイデアはダイヤモンドへの高濃度Bドーピングにも有効である。

Report

(2 results)
  • 2009 Annual Research Report
  • 2008 Annual Research Report
  • Research Products

    (40 results)

All 2010 2009 2008 Other

All Journal Article (13 results) (of which Peer Reviewed: 13 results) Presentation (24 results) Book (1 results) Remarks (2 results)

  • [Journal Article] Metallization of α-boron by hydrogen doping2009

    • Author(s)
      H.Dekura, K.Shirai, A.Yanase
    • Journal Title

      J.Phys.: Conf.Ser. 176

      Pages: 12005-120016

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Possibility of defect in α-boron2009

    • Author(s)
      H.Dekura, K.Shirai, A.Yanase
    • Journal Title

      J.Phys.: Conf.Ser. 176

      Pages: 12004-12010

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Superconductivity research on boron solids and an efficient doping method2009

    • Author(s)
      K.Shirai, H.Dekura, A.Masago
    • Journal Title

      J.Phys.: Conf.Ser.176 176

      Pages: 12001-120018

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Electronic structure and electrical resistivity of α-boron under high pressure2009

    • Author(s)
      K.Shirai, H.Dekura, A.Yanase
    • Journal Title

      J.Phys.Soc.Jpn. 78

      Pages: 94714-94723

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Control of impurity diffusion in silicon by IR Laser excitation2009

    • Author(s)
      K.Shirai, M.Matsukawa, T.Moriwaki, Y.Ikemoto
    • Journal Title

      Physica B 404

      Pages: 4685-4688

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] ボロンの新高圧相をめぐって2009

    • Author(s)
      白井光雲
    • Journal Title

      高圧力の科学と技術 19

      Pages: 304-408

    • NAID

      10026121995

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Utilization of high pressure for synthesizing superconducting semiconductors : -analysis of Ekimov's method-2009

    • Author(s)
      K. Shirai and H. Dekura
    • Journal Title

      Phys. Status Solidi B 246

      Pages: 673-678

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] A. new structure of Cu complex in Si2009

    • Author(s)
      K. Shirai, H. Yamaguchi, A. Yanase, and H. Katayama-Yoshida
    • Journal Title

      J. Phys. : Condens. Matter 21

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Fermi surface and metallic properties of graphite at high pressures

    • Author(s)
      N.Nakae, J.Ishisada, K.Shirai, A.Yanase
    • Journal Title

      J.Phys.Chem.Solids (in press)

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Metalicity of boron carbides at high pressure

    • Author(s)
      H.Dekura, K.Shirai, A.Yanase
    • Journal Title

      J.Phys.: Conf.Ser. (in press)

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Theoretical investigation on synthesizing BC_5 crystal

    • Author(s)
      N.Nakae, J.Ishisada, H.Dekura, K.Shirai
    • Journal Title

      J.Phys.: Conf.Ser. (in press)

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Calculation of Fermi surface and its application to Li-doped α-boron

    • Author(s)
      H. Dekura, K. Shirai, and A. Yanase
    • Journal Title

      J. Comput. and Theor. Nanoscience (in press)

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] The stable site and diffusion of impurity Cu in Si

    • Author(s)
      H. Yamaguchi, K. Shirai, and H. Katayama-Yoshida
    • Journal Title

      J. Comput. and Theor. Nanoscience (in press)

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Presentation] 高圧を利用した硬い超伝導材料探索2010

    • Author(s)
      白井光雲
    • Organizer
      第2回配列ナノ空間研究会
    • Place of Presentation
      広島 宮島商工会館
    • Year and Date
      2010-03-03
    • Related Report
      2009 Annual Research Report
  • [Presentation] 二十面体構造のホウ素系物質による超伝導探索2010

    • Author(s)
      白井光雲
    • Organizer
      第5回特定領域研究会議「配列ナノ空間を利用した新物質科学ユビキタス元素戦略」
    • Place of Presentation
      東京大学本郷キャンパス
    • Year and Date
      2010-01-08
    • Related Report
      2009 Annual Research Report
  • [Presentation] Lifetime and Anharmonicity of Librational Modes in Semiconductors2009

    • Author(s)
      K.Shirai
    • Organizer
      Materials Research Society 2009 Fall Meeting
    • Place of Presentation
      Hynes Convention Center & Sheraton Boston Hotel, U.S.A.
    • Year and Date
      2009-12-02
    • Related Report
      2009 Annual Research Report
  • [Presentation] グラファイトの高圧における電気特性と超伝導探索2009

    • Author(s)
      中江伸也、出倉春彦、白井光雲、柳瀬章
    • Organizer
      日本物理学会秋季大会
    • Place of Presentation
      熊本大学黒髪キャンパス
    • Year and Date
      2009-09-28
    • Related Report
      2009 Annual Research Report
  • [Presentation] BC系における超伝導探索2009

    • Author(s)
      白井光雲、中江伸也、出倉春彦
    • Organizer
      日本物理学会秋季大会
    • Place of Presentation
      熊本大学黒髪キャンパス
    • Year and Date
      2009-09-28
    • Related Report
      2009 Annual Research Report
  • [Presentation] Li添加したαホウ素の動的安定性2009

    • Author(s)
      出倉春彦、濱田幾太郎、柳瀬章、Nathalie Vast、白井光雲
    • Organizer
      日本物理学会秋季大会
    • Place of Presentation
      熊本大学黒髪キャンパス
    • Year and Date
      2009-09-25
    • Related Report
      2009 Annual Research Report
  • [Presentation] シリコン中のCu不純物-最近のトピックスから-2009

    • Author(s)
      白井光雲
    • Organizer
      第19回格子欠陥フォーラム
    • Place of Presentation
      九州大学応用力学研究所
    • Year and Date
      2009-09-24
    • Related Report
      2009 Annual Research Report
  • [Presentation] シリコン中のCu不純物の挙動II2009

    • Author(s)
      白井光雲、松川和人
    • Organizer
      2009年秋季応用物理学会
    • Place of Presentation
      富山大学
    • Year and Date
      2009-09-10
    • Related Report
      2009 Annual Research Report
  • [Presentation] Metallicity of Boron Carbides at High Pressure2009

    • Author(s)
      H.Dekura, K.Shirai, A.Yanase
    • Organizer
      Int.Conf.High Pressure Science and Technology (Joint AIRAP-22 & HPXJ-50)
    • Place of Presentation
      東京国際交流会館
    • Year and Date
      2009-07-29
    • Related Report
      2009 Annual Research Report
  • [Presentation] A New Structure of Cu Complex in Si and its Photoluminescence2009

    • Author(s)
      K.Shirai, H.Yamaguchi, A.Yanase, H.Katayama-Yoshida
    • Organizer
      25^<th> International Conference on Defects in Semiconductors
    • Place of Presentation
      St.Petersburg State Polytechnical University, Russia
    • Year and Date
      2009-07-20
    • Related Report
      2009 Annual Research Report
  • [Presentation] 計算機ナノマテリアルデザインの産業応用2009

    • Author(s)
      白井光雲
    • Organizer
      平成21年度第1回産研テクノサロン
    • Place of Presentation
      大阪大学産業科学研究所
    • Year and Date
      2009-06-10
    • Related Report
      2009 Annual Research Report
  • [Presentation] Superconductivity of Icosahedron-Based Semiconducting Boron2009

    • Author(s)
      K.Shirai
    • Organizer
      15^<th> International Symposium on Intercalation Compounds
    • Place of Presentation
      Tsinghua University, Beijing China
    • Year and Date
      2009-05-15
    • Related Report
      2009 Annual Research Report
  • [Presentation] 二十面体構造のホウ素系物質による超伝導探索2009

    • Author(s)
      白井光雲
    • Organizer
      特定領域研究「配列ナノ空間を利用した新物質科学ユビキタス元素戦略」第3回領域会議
    • Place of Presentation
      東工大、大岡山キャンパス
    • Year and Date
      2009-01-10
    • Related Report
      2008 Annual Research Report
  • [Presentation] Metalliztion of electron-phonon coupling in icosahedral α-B_<12> and Li-doped B_<12>2009

    • Author(s)
      H. Dekura, N. Vast, E. Betranhandy, K. Shirai, and V. Trinite
    • Organizer
      14th International Workshop on Computational Physics and Materials Science : Total Energy and Force Methods
    • Place of Presentation
      Trieste, Itally
    • Year and Date
      2009-01-08
    • Related Report
      2008 Annual Research Report
  • [Presentation] シリコン中の単原子空孔がもたらす格子ダイナミクスへの影響2008

    • Author(s)
      白井光雲、出倉春彦
    • Organizer
      物性科学領域横断研究会「スピンが拓く物性科学の最前線」
    • Place of Presentation
      東大本郷キャンパス武田ホール
    • Year and Date
      2008-11-29
    • Related Report
      2008 Annual Research Report
  • [Presentation] ボロン、ダイヤモンド結晶における高濃度ドープによる超伝導実現 : -高圧による実現-2008

    • Author(s)
      白井光雲、出倉春彦
    • Organizer
      2008年度格子欠陥フォーラム「欠陥研究、その明日への挑戦」
    • Place of Presentation
      東北大学金属材料研究所
    • Year and Date
      2008-09-24
    • Related Report
      2008 Annual Research Report
  • [Presentation] αホウ素の不純物添加による金属化2008

    • Author(s)
      出倉春彦、白井光雲
    • Organizer
      2008年春の日本物理学会
    • Place of Presentation
      岩手大
    • Year and Date
      2008-09-22
    • Related Report
      2008 Annual Research Report
  • [Presentation] Ekimovの高圧を使ったBドープダイヤモンド作成の解析2008

    • Author(s)
      白井光雲、出倉春彦
    • Organizer
      2008年春の日本物理学会
    • Place of Presentation
      岩手大
    • Year and Date
      2008-09-20
    • Related Report
      2008 Annual Research Report
  • [Presentation] Utilization of high pressure for synthesizing superconducting semiconductors2008

    • Author(s)
      K. Shirai, H. Dekura, and A. Yanase
    • Organizer
      13th High Pressure Semiconductor Physics
    • Place of Presentation
      Fortaleza, Brazil(Invited)
    • Year and Date
      2008-09-09
    • Related Report
      2008 Annual Research Report
  • [Presentation] A new doping method to semiconducting boron for superconductivity application2008

    • Author(s)
      K. Shirai, H. Dekura, and A. Masago
    • Organizer
      16th International Symposium on Boron and Rnrides and Related Materials
    • Place of Presentation
      Matsue, Shimane(Oral)
    • Year and Date
      2008-09-09
    • Related Report
      2008 Annual Research Report
  • [Presentation] Metallization of a-boron for superconductive material2008

    • Author(s)
      H. Dekura, K. Shirai, A. Yanase
    • Organizer
      16th International Symposium on Boron and Borides and Related Materials
    • Place of Presentation
      Matsue, Shimane
    • Year and Date
      2008-09-09
    • Related Report
      2008 Annual Research Report
  • [Presentation] Possibility of defect in α-boron2008

    • Author(s)
      H. Dekura, K. Shirai, A. Yanase
    • Organizer
      16th International Symposium on Boron and Borides and Related Materials
    • Place of Presentation
      Matsue, Shimane
    • Year and Date
      2008-09-09
    • Related Report
      2008 Annual Research Report
  • [Presentation] Cu complex in silicon and its photoluminescence(Oral)2008

    • Author(s)
      K. Shirai, H. Yamaguchi, K. Matsukawa, A. Yanase, and S. Emura
    • Organizer
      29th International Conference on the Physics of Semiconductors
    • Place of Presentation
      Rio de Janeiro, Brazil
    • Year and Date
      2008-07-27
    • Related Report
      2008 Annual Research Report
  • [Presentation] Utilization of high pressure for synthesizing superconductivity in semiconductors : -analysis of Ekimov's method-2008

    • Author(s)
      K. Shirai, H. Dekura
    • Organizer
      International Workshop on Superconductivity in Diamond and Related Materials
    • Place of Presentation
      Tsukuba, Japan
    • Year and Date
      2008-07-07
    • Related Report
      2008 Annual Research Report
  • [Book] 「高圧における固体ホウ素の性質」第16回ホウ素・ホウ化物および関連物質国際会議組織委員会編「ホウ素・ホウ化物および関連物質の基礎と応用」2008

    • Author(s)
      白井光雲
    • Publisher
      シーエムシー出版
    • Related Report
      2008 Annual Research Report
  • [Remarks]

    • URL

      http://www.cmp.sanken.osaka-u.ac.jp/~koun/

    • Related Report
      2009 Annual Research Report
  • [Remarks]

    • URL

      http://www.cmp.sanken.osaka-u.ac.jp/~koun/

    • Related Report
      2008 Annual Research Report

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Published: 2008-04-01   Modified: 2018-03-28  

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