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2010 Fiscal Year Final Research Report

Novel electronic phases with coupled spin/charge fluctuations

Research Project

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Project/Area Number 20244055
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Research Field Condensed matter physics II
Research InstitutionThe University of Tokyo

Principal Investigator

KANODA Kazushi  The University of Tokyo, 大学院・工学系研究科, 教授 (20194946)

Co-Investigator(Kenkyū-buntansha) MIYAGAWA Kazuya  東京大学, 大学院・工学系研究科, 助教 (90302760)
Project Period (FY) 2008 – 2010
Keywords有機導体 / 強相関電子系 / 核磁気共鳴法 / 電子輸送特性 / モット転移 / スピン液体 / 超伝導 / 中性-イオン性転移
Research Abstract

To explore novel electronic phases with charge and spin fluctuations, we studied triangular-lattice organics situated near Mott transition. We found that the Mott transition is accompanied with unconventional criticality as found in both of charge and spin degrees of freedom. Moreover, it is revealed that spin frustration determines the ground state in Mott insulating phase, and presence or absence of pseudo-gap, superconducting critical temperature and strong or weak Mott transition.

  • Research Products

    (42 results)

All 2011 2010 2009 2008 Other

All Journal Article (12 results) (of which Peer Reviewed: 12 results) Presentation (27 results) Book (2 results) Remarks (1 results)

  • [Journal Article] Mott Physics in Organic Conductors with Triangular Lattices2011

    • Author(s)
      K.Kanoda, R.Kato
    • Journal Title

      Ann.Rev.Condens Mat.Phys 2

      Pages: 167-188

    • Peer Reviewed
  • [Journal Article] Magnetic and non-magnetic phases of a quantum spin liquid2011

    • Author(s)
      F.L.Pratt, P.J.Baker, S.J.Bulndell, T.Lancaster, S.Ohira-Kawamura, C.Baines, Y.Shimizu, K.Kanoda, I.Watanabe, G.Saito
    • Journal Title

      Nature 471

      Pages: 612-616

    • Peer Reviewed
  • [Journal Article] Charge-Lattice-Coupled Quantum Fluctuations in DMTTF-2,6-QBr_2Cl(_2)2010

    • Author(s)
      F.Iwase, K.Miyagawa, K.Kanoda, S.Horiuchi, Y.Tokura
    • Journal Title

      Journal of the Physical Society of Japan 79

      Pages: 043709-1-4

    • Peer Reviewed
  • [Journal Article] ^<13>C NMR Study on Zero-Gap State in the Organic Conductor θ-(BEDT-TTF)_2I_3 under Pressure2010

    • Author(s)
      K.Miyagawa, M.Hirayama, M.Tamura, K.Kanoda
    • Journal Title

      Journal of the Physical Society of Japan 79

      Pages: 063703-1-3

    • Peer Reviewed
  • [Journal Article] Pressure-induced superconductivity and Mott transition in spin-liquid κ-(ET)_2Cu_2(CN)_3 probed by ^<13>C NMR2010

    • Author(s)
      Y.Shimizu, H.Kasahara, T.Furuta, K.Miyagawa, K.Kanoda, M.Maesato, G.Saito
    • Journal Title

      Physical Review B 81

      Pages: 224508-1-5

    • Peer Reviewed
  • [Journal Article] Spin ordering and enhancement of electronic heat capacity in an organic system of (DI-DCNQI)_2Ag_<1-x>Cu_x2009

    • Author(s)
      K.Okuma, S.Yamashita, Y.Nakazawa, M.Oguni, K.Miyagawa, K.Kanoda
    • Journal Title

      Journal of Physics-Condensed Matter 21

      Pages: 015602-1-4

    • Peer Reviewed
  • [Journal Article] ontactless conductivity measurements on the organic conductor, κ-(ET)_4Hg_<2.89>Br_8, under pressure2009

    • Author(s)
      H.Oike, K.Miyagawa, K.Kanoda, H.Taniiguchi, K.Murata
    • Journal Title

      Physica B 404

      Pages: 376-378

    • Peer Reviewed
  • [Journal Article] Inhomogeneous spin state in the organic conductor κ-(BEDT-TTF)_4Hg_<2.78>Cl_82009

    • Author(s)
      Y.Kurosaki, A.Huruta, H.Taniguchi, K.Miyagawa, K.Kanoda
    • Journal Title

      Physica B 404

      Pages: 3138-3140

    • Peer Reviewed
  • [Journal Article] Magnetic Mott criticality in a kappa-type organic salt probed by NMR2009

    • Author(s)
      F.Kagawa, K.Miyagawa, K.Kanoda
    • Journal Title

      Nature Physics 5

      Pages: 880-884

    • Peer Reviewed
  • [Journal Article] Thermodynamic properties of a spin-1/2 spin-liquid state in a kappa-type organic salt2008

    • Author(s)
      S.Yamashita, Y.Nakazawa, M.Oguni, Y.Oshima, H.Nojiri, Y.Shimizu, K.Miyagawa, K.Kanoda
    • Journal Title

      Nature Physics 4

      Pages: 459-462

    • Peer Reviewed
  • [Journal Article] Field-induced staggered magnetic moment in the quasi-two-dimensional organic Mott insulator κ-(BEDT-TTF)_2Cu[N(CN)_2]Cl2008

    • Author(s)
      F.Kagawa, Y.Kurosaki, K.Miyagawa, K.Kanoda
    • Journal Title

      Physical Review B 78

      Pages: 184402-1-4

    • Peer Reviewed
  • [Journal Article] NQR study of neutral-ionic phase transition and quantum paraelectric state in organic charge-transfer complexes2008

    • Author(s)
      F.Iwase, K.Miyagawa, K.Kanoda, S.Horiuchi, Y.Tokura
    • Journal Title

      Solid State Science 10

      Pages: 1752-1756

    • Peer Reviewed
  • [Presentation] Superconductivity emerging from antiferromagnet and spin liquid in organics2011

    • Author(s)
      鹿野田一司
    • Organizer
      MTI Superconductor-insulator transition workshop
    • Place of Presentation
      Argonne (USA)
    • Year and Date
      20111116-20111119
  • [Presentation] Mott Physics of Correlated Electrons in Molecular conductors2011

    • Author(s)
      鹿野田一司
    • Organizer
      International School & Symposium on Multifunctional Molecule-based Materials
    • Place of Presentation
      Argonne (USA)
    • Year and Date
      20110313-20110318
  • [Presentation] X線照射されたκ-(BEDT-TTF)_2Cu[N(CN)_2]Brの^1H NMR2011

    • Author(s)
      宮川和也,佐々木孝彦,米山直樹,小林典男,鹿野田一司
    • Organizer
      日本物理学会第66回年次大会
    • Place of Presentation
      新潟大学(新潟県)
    • Year and Date
      2011-03-27
  • [Presentation] 高圧下α-(BEDT-TTF)_2I_3 における面垂直磁場下massless Dirac fermion状態の^<13>C NMR測定2011

    • Author(s)
      平田倫啓,石川恭平,宮川和也,鹿野田一司,田村雅史
    • Organizer
      日本物理学会第66回年次大会
    • Place of Presentation
      新潟大学(新潟県)
    • Year and Date
      2011-03-25
  • [Presentation] α-(BEDT-TTF)_2I_3の高圧・低温下^<13>C-NMR研究2011

    • Author(s)
      石川恭平,平田倫啓,宮川和也,田村雅史,鹿野田一司
    • Organizer
      日本物理学会第66回年次大会
    • Place of Presentation
      新潟大学(新潟県)
    • Year and Date
      2011-03-25
  • [Presentation] Quantum charge/spin fluctuations of correlated electrons in quasi-triangular lattice organics2010

    • Author(s)
      鹿野田一司
    • Organizer
      International Conference on Quantum Effects in Solids of Today' (I-ConQUEST)
    • Place of Presentation
      New Delhi (India)
    • Year and Date
      20101220-20101223
  • [Presentation] Pressure study of neutral-ionic transition ; charge-lattice-coupled quantum criticality and deconfinement of spins2010

    • Author(s)
      鹿野田一司
    • Organizer
      5th Asian Conference on High pressure Research (ACHPR-5)
    • Place of Presentation
      Matsue (Japan)
    • Year and Date
      20101108-20101112
  • [Presentation] Electron correlation and spin frustration in quasi-triangular lattice organics2010

    • Author(s)
      鹿野田一司
    • Organizer
      International Conference on Conducting Materials 2010 (ICoCom2010)
    • Place of Presentation
      Sousse (Tunisia)
    • Year and Date
      20101103-20101107
  • [Presentation] Superconductivity in quasi-triangular lattice organics2010

    • Author(s)
      鹿野田一司
    • Organizer
      Super-PIRE Kickoff Meeting
    • Place of Presentation
      Knoxville (USA)
    • Year and Date
      20101028-20101031
  • [Presentation] Charge-lattice-coupled quantum criticality and deconfinement of spins in neutral-ionic transition2010

    • Author(s)
      鹿野田一司
    • Organizer
      11th German-Japanese Symposium "New Quantum States and Phenomena in Condensed Matter
    • Place of Presentation
      Hiroshima (Japan)
    • Year and Date
      20100913-20100916
  • [Presentation] Pressure-induced Mott transition and superconductivity in spin-frustrated organics2010

    • Author(s)
      鹿野田一司
    • Organizer
      International workshop on Recent advances in broad-band solid-state NMR of correlated electronic systems
    • Place of Presentation
      Trogir (Croatia)
    • Year and Date
      20100905-20100910
  • [Presentation] Pressure-induced Mott transition and superconductivity in spin-frustrated organics2010

    • Author(s)
      鹿野田一司
    • Organizer
      Internationa Center for Materials Research Conference on Pressure effects on Materials
    • Place of Presentation
      Santa Barbara (USA)
    • Year and Date
      20100822-20100828
  • [Presentation] Mott transition in triangular-lattice organics---from spin liquid to superconductivity---2010

    • Author(s)
      鹿野田一司
    • Organizer
      ICTP Workshop on Emergence of new states of matter in magnetic systems and beyond
    • Place of Presentation
      Trieste (Italy)
    • Year and Date
      20100705-20100709
  • [Presentation] Magnetism in metallic and zero-gap states of a bulk quasi-two-dimensional organic conductor, θ-(ET)_2I_32010

    • Author(s)
      K.Miyagawa, M.Hirayama, M.Hirata, K.Ishikawa, K.Kadano, M.Tamura
    • Organizer
      International Conference on Conducting Materials 2010 (ICoCom2010)
    • Place of Presentation
      Sousse (Tunisia)
    • Year and Date
      2010-11-04
  • [Presentation] (DI-DCNQI)_2Cuの高圧相^<13>C NMR2010

    • Author(s)
      宮川和也,中田智,鹿野田一司,開康一,高橋利宏
    • Organizer
      日本物理学会2010年秋季大会
    • Place of Presentation
      大阪府立大学 (大阪府)
    • Year and Date
      2010-09-26
  • [Presentation] ^<13>C NMR Investigation of κ-(MeDH-TTP)_2AsF_62010

    • Author(s)
      K.Miyagawa, K.Kanoda, K.Fukada, H.Nishikawa
    • Organizer
      International Conference on Science and Technology Synthetic Metals 2010 (ICSM2010)
    • Place of Presentation
      Kyoto (JAPAN)
    • Year and Date
      2010-07-05
  • [Presentation] Mott physics revealed by triangular-lattice organics2010

    • Author(s)
      鹿野田一司
    • Organizer
      International Conference on Science and Technology Synthetic Metals 2010 (ICSM2010)
    • Place of Presentation
      Kyoto (JAPAN)
    • Year and Date
      2010-07-05
  • [Presentation] (DI-DCNQI)_2Cu_3の高圧相における^<13>C NMR2010

    • Author(s)
      宮川和也,中田智,鹿野田一司,開康一,高橋利宏
    • Organizer
      日本物理学会第65回年次大会
    • Place of Presentation
      岡山大学 (岡山県)
    • Year and Date
      2010-03-23
  • [Presentation] α-(BEDT-TTF)_2I_3電荷不均化状態の13C-NMR研究2010

    • Author(s)
      平田倫啓,石川恭平,宮川和也,田村雅史,鹿野田一司
    • Organizer
      日本物理学会第65回年次大会
    • Place of Presentation
      岡山大学(岡山県)
    • Year and Date
      2010-03-21
  • [Presentation] (MeDH-TTF)_2AsF_6の^<13>C NMR2009

    • Author(s)
      宮川和也,鹿野田一司,西川浩之
    • Organizer
      日本物理学会2009年秋季大会
    • Place of Presentation
      熊本大学(熊本県)
    • Year and Date
      2009-09-26
  • [Presentation] 擬二次元有機導体θ-(ET))_2I_3の圧力下ゼロギャップ電子状態の^<13>C-NMR2009

    • Author(s)
      平田倫啓,宮川和也,田村雅史,鹿野田一司
    • Organizer
      日本物理学会2009年秋季大会
    • Place of Presentation
      熊本大学(熊本県)
    • Year and Date
      2009-09-25
  • [Presentation] ^<13>C NMR Investigation of Superconductivity in Quasi-Two-Dimensional Organic Superconductors, κ-type BEDT-TTF salts2009

    • Author(s)
      K.Miyagawa, A.Furuta, Y.Kurosaki, H.Hashiba, T.Furukawa, H.Kasahara, Y.Shimizu, H.Oike, K.Kanoda
    • Organizer
      9th International Conference on Mechanism of Superconductivity (M2S)
    • Place of Presentation
      Tokyo (Japan)
    • Year and Date
      2009-09-08
  • [Presentation] θ-(BEDT-TTF)_2I_3 の^<13>C-NMR2009

    • Author(s)
      平田倫啓,宮川和也,田村雅史,鹿野田一司
    • Organizer
      日本物理学会第64回年次大会
    • Place of Presentation
      立教大学(東京都)
    • Year and Date
      2009-03-30
  • [Presentation] 単一成分分子性導体[M(tmdt)_2](M=Pt,Ni)の^1H NMR2009

    • Author(s)
      宮川和也,吉村仁秀,鹿野田一司,周彪,小林速男,小林昭子
    • Organizer
      日本物理学会第64回年次大会
    • Place of Presentation
      立教大学(東京都)
    • Year and Date
      2009-03-27
  • [Presentation] θ-(BEDT-TTF)_2MZn(SCN)_4の強電場下NMR2008

    • Author(s)
      宮川和也,武藤勇太,鹿野田一司
    • Organizer
      日本物理学会2008年秋季大会
    • Place of Presentation
      岩手大学(岩手県)
    • Year and Date
      2008-09-22
  • [Presentation] Quantum Criticality in Neutral-Ionic Phase Transition Probed by NQR2008

    • Author(s)
      鹿野田一司
    • Organizer
      5th Internatioal Workshop on Electron Crystals
    • Place of Presentation
      カルゲーゼ(フランス)
    • Year and Date
      2008-08-29
  • [Presentation] NMR Study on Superconducting State of Doped Mott Insulator with Triangular Lattice, κ-(BEDT-TTF)_4Hg_<2.89>Br_82008

    • Author(s)
      K.Miyagawa, H.Ooike, H.Taniguchi, K Kanoda
    • Organizer
      25th International Conference on Low Temperature Physics (LT25)
    • Place of Presentation
      Amsterdam (Holland)
    • Year and Date
      2008-08-08
  • [Book] 超伝導ハンドブック(第2.1章)2009

    • Author(s)
      鹿野田一司, 他
    • Total Pages
      34-38
    • Publisher
      朝倉書店
  • [Book] The physics of Organic Superconductors and conductors(Chapter 22)2008

    • Author(s)
      鹿野田一司
    • Total Pages
      623-642
    • Publisher
      Springer
  • [Remarks] ホームページ等

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Published: 2012-01-26   Modified: 2016-04-21  

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