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2008 Fiscal Year Final Research Report

Superconductivity of carbon and related-orbital systems

Research Project

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Project/Area Number 16076201
Research Category

Grant-in-Aid for Scientific Research on Priority Areas

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

Principal Investigator

SAITO Riichiro  Tohoku University, 大学院理学研究科, 教授 (00178518)

Co-Investigator(Kenkyū-buntansha) FKUYAMA Hidetoshi  東京理科大学, 理学部, 教授 (10004441)
IWASA Yoshihiro  東北大学, 金属材料研究所, 教授 (20184864)
SASAKI Takahiko  東北大学, 金属材料研究所, 准教授 (20241565)
Co-Investigator(Renkei-kenkyūsha) FKUYAMA Hidetoshi  東京理科大学, 理学部, 教授 (10004441)
Project Period (FY) 2004 – 2008
Keywordsグラフェン / エッジ状態 / 層状超伝導体 / インターカレーション / モット転移
Research Abstract

炭素物質は超伝導になりにくいと考えられていたが、結晶端に存在する状態が超伝導になることを見出した。不純物を加えた、強く乱れた系の超伝導は、特殊な機構によることを見出した。磁気的に不活性な層状構造の絶縁体に電子ドープして生じる超伝導に興味深い異常な振る舞いを見出した。分子性物質にエックス線を照射することで欠陥を生成し、キャリア数を調節することができることを見出した。

  • Research Products

    (40 results)

All 2009 2008 2007 2006 2005 Other

All Journal Article (22 results) (of which Peer Reviewed: 22 results) Presentation (9 results) Book (8 results) Remarks (1 results)

  • [Journal Article] Optical probe of carrier doping by x-ray irradiation in the organic dimer Mott insulator κ-(BEDT-TTF)2 Cu[N(CN)2]Cl2008

    • 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
  • [Journal Article] Mott transition and superconductivity in the strongly correlated oragnic superconductor κ-(BEDT-TTF)2Cu[N(CN)2]Br2008

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

      Phys. Rev B 77

      Pages: 054505-1-5

    • Peer Reviewed
  • [Journal Article] Modulation-doped-semiconductor-like behavior manifested in magnetotransport measurements of LixZrNCl layered superconductors2008

    • Author(s)
      T. Takano, A. Kitora, Y. Taguchi, and Y. Iwasa
    • Journal Title

      Phys. Rev B, Vol. 77

      Pages: 104508-1-6

    • Peer Reviewed
  • [Journal Article] Interlayer-spacing dependence of Tc in LixMyHfNCl (M : molecule) superconductors2008

    • Author(s)
      T. Takano, T. Kishiume, Y. Taguchi, and Y. Iwasa
    • Journal Title

      Phys. Rev. Lett Vol. 100

      Pages: 247005-1-4

    • Peer Reviewed
  • [Journal Article] Resonant Raman scattering of the smallest single-walled carbon nanotubes2008

    • Author(s)
      Z. K. Tang, J. P. Zhai, Y. Y. Tong, X. J. Hu, R. Saito, C. T. Chan, P. Sheng
    • Journal Title

      Phys. Rev. Lett 101

      Pages: 047402-1-4

    • Peer Reviewed
  • [Journal Article] The t-J model as a mechanism of oxide high- Tc Superconductivity2008

    • Author(s)
      M. Ogata and H. Fukuyama
    • Journal Title

      Rep. Prog. Phys 71

      Pages: 036501-1-45

    • Peer Reviewed
  • [Journal Article] A CPA Calculation of superconductivity in boron-doped diamond2007

    • Author(s)
      T. Shirakawa, S. Horiuchi, Y. Ohta and H. Fukuyama
    • Journal Title

      J. Phys. Soc. Jpn 76

      Pages: 014711-1-9

    • Peer Reviewed
  • [Journal Article] Isotope effect in LixZrNCl superconductors2007

    • Author(s)
      Y. Taguchi, T. Kawabata, T. Takano, A. Kitora, K. Kato, M. Takata, and Y. Iwasa
    • Journal Title

      Phys. Rev B, 76

      Pages: 064508-1 -4

    • Peer Reviewed
  • [Journal Article] Probing electron-phonon interaction in LixZrNCl superconductors by Raman scattering2007

    • Author(s)
      A. Kitora, Y. Taguchi, and Y. Iwasa
    • Journal Title

      J. Phys. Soc. Jpn Vol.76

      Pages: 023706-1-5

    • Peer Reviewed
  • [Journal Article] X-ray Irradiation induced carrier doping effects in organic dimer-Mott insulators2007

    • Author(s)
      T. Sasaki, H. Oizumi, N. Yoneyama, N. Kobayashi, N. Toyota
    • Journal Title

      J. Phys. Soc. Jpn 76

      Pages: 123701-1-4

    • Peer Reviewed
  • [Journal Article] Anomalous Orbital Magnetism and Hall Effect of Massless Fermions in Two Dimension2007

    • Author(s)
      H. Fukuyama
    • Journal Title

      J. Phys. Soc. Jpn 76

      Pages: 043711-1-3

    • Peer Reviewed
  • [Journal Article] Trigonal anisotropy in Graphite and Carbon nanotubes2006

    • Author(s)
      R. Saito, J. Jiang, A. Gr?neis, K. Sato, Y. Oyama, Ge. G. Samsonidze, S. G. Chou, G. Dresselhaus, M. S. Dresselhaus, L. G. Can,cado, C. Fantini, A. Jorio, M. A. Pimenta
    • Journal Title

      Mol. Cryst. Liq. Cryst 455

      Pages: 287-294

    • Peer Reviewed
  • [Journal Article] Physics of Molecular Conductors2006

    • Author(s)
      H. Fukuyama
    • Journal Title

      Journal of the physical society of Japan 75

      Pages: 051001-1-7

    • Peer Reviewed
  • [Journal Article] Inter-band effects of magnetic field on orbital susceptibility and Hall conductivity - case of bismuth2006

    • Author(s)
      H. Fukuyama
    • Journal Title

      Ann. Phys.(Leipzig) 15, 7-8

      Pages: 520-525

    • Peer Reviewed
  • [Journal Article] Electrical Inhomogeneity at the Mott Transition in the Band Width Controlled κ-(BEDT-TTF)2Cu[N(CN)2Br2006

    • Author(s)
      T. Sasaki, N. Yoneyama, A.Suzuki, I.Ito, N. Kobayashi, Y.Ikemoto, H. Kimura, N.Hanasaki, T. Tajima
    • Journal Title

      Journal of Low Temperature Physics 142

      Pages: 377-382

    • Peer Reviewed
  • [Journal Article] High temperature superconductivity by transforming bonds into bands2006

    • Author(s)
      H. Fukuyama
    • Journal Title

      Journal of Superconductivity and Novel Magnetism 19

      Pages: 201-202

    • Peer Reviewed
  • [Journal Article] Increase in Tc upon reduction of doping in LixZrNCl superconductors2006

    • Author(s)
      Y. Taguchi, A. Kitora, and Y. Iwasa
    • Journal Title

      Phys. Rev. Lett 97

      Pages: 107001-1-4

    • Peer Reviewed
  • [Journal Article] Cutting lines near the Fermi energy of single wall carbon nanotubes2005

    • Author(s)
      R. Saito, K. Sato, Y. Oyama, J. Jiang, Ge. G. Samsonidze, G. Dresslhaus, M. S. Dresselhaus
    • Journal Title

      Phys. Rev B 72

      Pages: 153413-1-4

    • Peer Reviewed
  • [Journal Article] Infrared- active Vibrational Modes of Single-Walled Carbon Nanotubes2005

    • Author(s)
      U. J. Kim, X. M. Liu, C. A. Furtado, G. Chen, R. Saito, J. Jiang, M. S. Dresselhaus, P. C. Eklund
    • Journal Title

      Phys. Rev. Lett 95

      Pages: 157402-1-4

    • Peer Reviewed
  • [Journal Article] Strain-induced quantum interference effects on the resonant Raman cross section of carbon nanotubes2005

    • Author(s)
      A. G. Souza Filho, N. Kobayashi, J. Jiang, A. Gruneis, R. Saito, S. B. Cronin, J. Mendes Filho, Ge. G. Samsonidze, G. Dresselhans, M. S. Dresselhaus
    • Journal Title

      Phys. Rev. Lett 95

      Pages: 217403-1-4

    • Peer Reviewed
  • [Journal Article] Real space imaging of the metal-insulator phase separation in the band width controlled organic Mott system κ-(BEDT-TTF)2Cu[N(CN)2]Br2005

    • Author(s)
      T. Sasaki, N. Yoneyama, A. Suzuki, N. Kobayashi, Y. Ikemoto and H. Kimura
    • Journal Title

      J. Phys. Soc. Jpn 74

      Pages: 2351-2360

    • Peer Reviewed
  • [Journal Article] Specific heat measurement of the layered nitride superconductor LixZrNCl2005

    • Author(s)
      M. Hisakabe, and Y. Iwasa
    • Journal Title

      Phys. Rev. Lett 94

      Pages: 217002-1-4

    • Peer Reviewed
  • [Presentation] Evolution of specific heat via electron doping in the layered nitride LixZrNCl superconductor2008

    • Author(s)
      Y. Kasahara, T. Kishiume, T. Takano, Y. Taguchi, and Y. Iwasa
    • Organizer
      25th International Conference on Low Temperature Physics (LT25)
    • Place of Presentation
      Amsterdam, Netherland
    • Year and Date
      2008-08-08
  • [Presentation] Optical probe of carrier doping effect by X-ray irradiation in organic dimer-Mott insulator2008

    • Author(s)
      T. Sasaki
    • Organizer
      International Symposium on Molecular Conductors ISMC2008
    • Place of Presentation
      Okazaki, Aichi, Japan
    • Year and Date
      2008-07-23
  • [Presentation] Chirality dependent phonon softening of metallic single wall carbon nanotubes2008

    • Author(s)
      Riichiro Saito
    • Organizer
      9th Int'l Conferene on the Science and Application of Nanotubes(NT08)
    • Place of Presentation
      Montpellier, France
    • Year and Date
      2008-07-03
  • [Presentation] Controlling physical parameters of layer-structured nitride-halide superconductors2008

    • Author(s)
      Y. Taguchi and Y. Iwasa
    • Organizer
      American Physical Society 2008 March Meeting
    • Place of Presentation
      New Orleans, USA
    • Year and Date
      2008-03-11
  • [Presentation] Synthesis and physical properties of nitride-chloride superconductors with layer structure2007

    • Author(s)
      Y. Taguchi and Y. Iwasa
    • Organizer
      Materials Research Society 2007 Fall Meeting
    • Place of Presentation
      Boston, USA
    • Year and Date
      2007-11-27
  • [Presentation] Infrared Imaging in the Strongly Correlated Molecular Conductors2007

    • Author(s)
      T. Sasaki
    • Organizer
      4th International Workshop on Infrared Microscopy and Spectroscopy with Accelerator Base Sources (WIRMS2007)
    • Place of Presentation
      Awaji, Hyogo, Japan
    • Year and Date
      2007-09-28
  • [Presentation] Strongly Correlated Electrons in Molecular Solids2007

    • Author(s)
      H. Fukuyama
    • Organizer
      7thInternational Symposium on Crystalline Organic Metals, Superconductors and Ferromagne
    • Place of Presentation
      Penisola, Spain
    • Year and Date
      2007-09-28
  • [Presentation] Exciton-phonon interaction and Raman intensity of carbon nanotubes2007

    • Author(s)
      R. Saito
    • Organizer
      2nd Workshop on Nanotube Optics & Nanospectroscopy, Wonton
    • Place of Presentation
      Ottawa, Canada
    • Year and Date
      2007-06-05
  • [Presentation] Chirality and energy dependence of first and second order resonance Raman intensity2006

    • Author(s)
      Riichiro Saito
    • Organizer
      Seventh International Conference on the Science and Application of Nanotubes, Organizing Committee NT06
    • Place of Presentation
      Nagano, Japan
    • Year and Date
      2006-06-20
  • [Book] 基礎固体物性2009

    • Author(s)
      齋藤理一郎
    • Total Pages
      1-174
    • Publisher
      朝倉書店
  • [Book] 固体物理, (Vol.43, No.10), 層状窒化物におけるキャリアドーピングと超伝導2008

    • Author(s)
      田口康二郎、高野琢、岩佐義宏
    • Total Pages
      599-615
  • [Book] 環状・筒状超分子新素材の応用技術, 〔高田十志和編〕2006

    • Author(s)
      竹延大志、岩佐義弘
    • Total Pages
      216-229
    • Publisher
      シーエムシー出版
  • [Book] ナノマテリアル工学大系 第2巻 ナノ金属2006

    • Author(s)
      岩佐義弘
    • Total Pages
      849-854
    • Publisher
      フジ・テクノシステム
  • [Book] 有機分子を内包したナノチューブ2006

    • Author(s)
      岩佐義弘
    • Total Pages
      13
    • Publisher
      シーエムシー出版
  • [Book] 進化する有機半導体(担当 第2章1節 有機半導体の金属絶縁体転移)2006

    • Author(s)
      佐々木孝彦, (共著)
    • Total Pages
      505
    • Publisher
      (株)エヌティーエス
  • [Book] 有機トランジスタ材料の評価と応用2005

    • Author(s)
      岩佐義弘
    • Total Pages
      189
    • Publisher
      シーエムシー出版
  • [Book] 物理学大辞典2005

    • Author(s)
      齋藤理一郎
    • Total Pages
      789-795
    • Publisher
      朝倉書店
  • [Remarks]

    • URL

      http://flex.phys.tohoku.ac.jp/

URL: 

Published: 2010-06-10   Modified: 2016-04-21  

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