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2010 Fiscal Year Self-evaluation Report

Control of carrier number and Mott criticality in strongly correlated organic conductors with molecular defects by irradiation

Research Project

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Project/Area Number 20340085
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Condensed matter physics II
Research InstitutionTohoku University

Principal Investigator

SASAKI Takahiko  Tohoku University, 金属材料研究所, 教授 (20241565)

Project Period (FY) 2008 – 2011
Keywords有機導体 / 強相関電子系 / 物性実験 / 低温物性
Research Abstract

本研究の目的は,強相関物質のひとつであるκ型BEDT-TTF系有機モット絶縁体に対して,これまで困難であったモット転移のキャリア数制御を,エックス線照射による分子欠陥生成よって行うことである.バンド幅制御型モット絶縁体に対してキャリア数制御手法を確立することにより,多変数(バンド幅,キャリア数,不均一)空間でのモット転移の臨界性と秩序相(超伝導,反強磁性)の競合変化を明らかにすることができる.実験可能な変数を新たに導入することで,有機系モット絶縁体を舞台にした新超伝導体の創製を含むモット系物性開拓への新展開を図る.さらに有機物質で発現する多彩な強相関電子状態の不純物効果,たとえば,電子相分離形成の実空間変調,3角格子フラストレーション系でのスピン液体の凍結,電荷秩序の融解などの未開拓な現象を発現,操作することを目指す

  • Research Products

    (12 results)

All 2010 2009 2008 Other

All Journal Article (5 results) (of which Peer Reviewed: 5 results) Presentation (4 results) Book (2 results) Remarks (1 results)

  • [Journal Article] Anomalous dielectric response in the dimer Mott insulator κ-(BEDT-TTF)_2Cu_2(CN)_3.2010

    • Author(s)
      M.Abdel-Jawad, I.Terasaki, T.Sasaki, N.Yoneyama, N.Kobayashi, Y.Uesu, C.Hotta.
    • Journal Title

      Phys.Rev.B 82

      Pages: 125119-1-5

    • Peer Reviewed
  • [Journal Article] Magnetic Properties of X-ray Irradiated Organic Mott Insulator κ-(BEDT-TTF)_2Cu[N(CN)_2]Cl.2010

    • Author(s)
      N.Yoneyama, K.Furukawa, T.Nakamura, T.Sasaki, N. Kobayashi.
    • Journal Title

      J.Phys.Soc.Jpn. 79

      Pages: 063706-1-4

    • Peer Reviewed
  • [Journal Article] Electron Localization near the Mott Transition in the Organic Superconductor κ-(BEDT-TTF)_2Cu[N(CN)_2]Br.2010

    • Author(s)
      K.Sano, T.Sasaki, N.Yoneyama, N.Kobayashi.
    • Journal Title

      Phys.Rev.Lett. 104

      Pages: 217003-1-4

    • Peer Reviewed
  • [Journal Article] Thermal-transport measurements in a quantum spin-liquid state of the frustrated triangular magnet κ-(BEDT-TTF)_2Cu_2(CN)_3.2009

    • Author(s)
      M.Yamashita, N.Nakata, Y.Kasahara, T.Sasaki, N.Yoneyama, N.Kobayashi, S.Fujimoto, T.Shibauchi, Y.Matsuda.
    • Journal Title

      Nature Physics 5

      Pages: 44-47

    • Peer Reviewed
  • [Journal Article] Optical probe of carrier doping by x-ray irradiation in the organic dimer Mott insulator κ-(BEDT-TTF)_2Cu[N(CN)_2]Cl.2008

    • Author(s)
      T.Sasaki, N.Yoneyama, Y.Nakamura, N.Kobayashi, Y.Ikemoto, T.Moriwaki, H.Kimura.
    • Journal Title

      Phys.Rev.Lett. 101

      Pages: 206403-1-4

    • Peer Reviewed
  • [Presentation] Enhancement of localization effect near Mott transition in κ-(BEDT-TTF)_2X2010

    • Author(s)
      T.Sasaki
    • Organizer
      International Conference on Science and Technology of Synthetic Metals 2010
    • Place of Presentation
      Kyoto International Conference Center.(selected oral contribution).
    • Year and Date
      20100704-20100709
  • [Presentation] Disorder effects on the Mott transition in organic conductors.2010

    • Author(s)
      T.Sasaki
    • Organizer
      International Symposium on "Novel states in correlated condensed matter- from model systems to real materials-
    • Place of Presentation
      Harnack-Haus,Berlin, Germany.(invited lecture)
    • Year and Date
      20100302-20100304
  • [Presentation] 分子性ダイマーモット絶縁体に現れる誘電異常2010

    • Author(s)
      佐々木孝彦
    • Organizer
      日本物理学会2010年秋季大会招待講演シンポジウム「やわらかい電荷秩序の得意な誘電性・伝導性と外場制御」
    • Place of Presentation
      大阪府立大学
    • Year and Date
      2010-09-23
  • [Presentation] Metal-Insulator Transition induced by Disorders in Organic Superconductor κ-(BEDT-TTF)_2Cu[N(CN)_2]Br.2009

    • Author(s)
      T.Sasaki
    • Organizer
      The 8th International symposium on Crystalline Organic Metals, Superconductors and Ferromagnets (ISCOM 2009)
    • Place of Presentation
      Niseko, Hokkaido, Japan.(selected oral contribution)
    • Year and Date
      20090912-20090917
  • [Book] Molecular Electronic and Related Materials-Control and Probe with Light- (Ed.T.Naito)2010

    • Author(s)
      T.Sasaki
    • Total Pages
      99-116
    • Publisher
      Transworld Research Network Inc.
  • [Book] 金属材料の最前線 ブルーバックス(B1643)(東北大学金属材料研究所編著)2009

    • Author(s)
      佐々木孝彦
    • Total Pages
      316-345
    • Publisher
      (株)講談社
  • [Remarks] ホームページ

    • URL

      http://cond-phys.imr.tohoku.ac.jp/

URL: 

Published: 2012-02-13   Modified: 2016-04-21  

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