Pressure-induced superconductivity and Mott transition in spin-liquid κ-(ET)2Cu2(CN)3 probed by 13C NMR

被引：25
|
作者：
Shimizu, Y. [1 ,2 ]
Kasahara, H. [1 ]
Furuta, T. [1 ]
Miyagawa, K. [1 ]
Kanoda, K. [1 ]
Maesato, M. [2 ]
Saito, G. [2 ]
机构：
[1] Univ Tokyo, Dept Appl Phys, Bunkyo Ku, Tokyo 1138656, Japan
[2] Kyoto Univ, Div Chem, Sakyo Ku, Kyoto 6068502, Japan
来源：
PHYSICAL REVIEW B | 2010年 / 81卷 / 22期
关键词：
UNCONVENTIONAL SUPERCONDUCTIVITY; STATE; RELAXATION; INSULATOR; PHYSICS;
D O I：
10.1103/PhysRevB.81.224508
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Pressure-induced superconductivity and Mott transition in the spin-liquid Mott insulator kappa-(ET)(2)Cu-2(CN)(3) have been investigated by C-13 NMR measurements. The Mott transition from the spin liquid to the Fermi liquid is observed as a sudden decrease in 1/T1T, where T-1 is the nuclear-spin-lattice relaxation time. Pseudogap behavior is absent in the Fermi-liquid state, unlike in the metallic phase adjacent to the antiferromagnetic Mott insulator. In the superconducting state, 1/T-1 have a cubic temperature dependence with no Hebel-Slichter peak, which is consistent with non-s-wave superconducting pairing.
引用
收藏
页数：5
相关论文
共 50 条
  • [1] NMR study of the spin-liquid state and Mott transition in the spin-frustrated organic system, κ-(ET)2Cu2(CN)3
    Shimizu, Y
    Kurosaki, Y
    Miyagawa, K
    Kanoda, K
    Maesato, M
    Saito, G
    [J]. SYNTHETIC METALS, 2005, 152 (1-3) : 393 - 396
  • [2] Quasi-continuous transition from a Fermi liquid to a spin liquid in κ-(ET)2Cu2(CN)3
    Tetsuya Furukawa
    Kazuhiko Kobashi
    Yosuke Kurosaki
    Kazuya Miyagawa
    Kazushi Kanoda
    [J]. Nature Communications, 9
  • [3] Quantum electric dipoles in spin-liquid dimer Mott insulator κ-ET2Cu2(CN)3
    Hotta, Chisa
    [J]. PHYSICAL REVIEW B, 2010, 82 (24):
  • [4] Quasi-continuous transition from a Fermi liquid to a spin liquid in κ-(ET)2Cu2(CN)3
    Furukawa, Tetsuya
    Kobashi, Kazuhiko
    Kurosaki, Yosuke
    Miyagawa, Kazuya
    Kanoda, Kazushi
    [J]. NATURE COMMUNICATIONS, 2018, 9
  • [5] Ultrasonic investigation of the transition at 6 K in the spin-liquid candidate κ-(BEDT-TTF)2Cu2(CN)3
    Poirier, Mario
    de Lafontaine, Mathieu
    Miyagawa, Kazuya
    Kanoda, Kazushi
    Shimizu, Yasuhiro
    [J]. PHYSICAL REVIEW B, 2014, 89 (04)
  • [6] Phase transition and lattice distortion in the proposed spin-liquid system κ-(BEDT-TTF)2Cu2(CN)3
    Lang, M.
    Manna, R. S.
    de Souza, M.
    Bruhl, A.
    Schlueter, J. A.
    [J]. PHYSICA B-CONDENSED MATTER, 2010, 405 (11) : S182 - S184
  • [7] Mott transition from a spin liquid to a fermi liquid in the spin-frustrated organic conductor κ-(ET)2Cu2(CN)3 -: art. no. 177001
    Kurosaki, Y
    Shimizu, Y
    Miyagawa, K
    Kanoda, K
    Saito, G
    [J]. PHYSICAL REVIEW LETTERS, 2005, 95 (17)
  • [8] Field-induced length changes in the spin-liquid candidate κ-(BEDT-TTF)2Cu2(CN)3
    Manna, Rudra Sekhar
    de Souza, Mariano
    Schlueter, John A.
    Lang, Michael
    [J]. PHYSICA STATUS SOLIDI C: CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 9, NO 5, 2012, 9 (05): : 1180 - 1182
  • [9] Nonmagnetic impurities in a S=1/2 frustrated triangular antiferromagnet: Broadening of 13C NMR lines in κ-(ET)2Cu2(CN)3
    Gregor, Karol
    Motrunich, Olexei I.
    [J]. PHYSICAL REVIEW B, 2009, 79 (02):
  • [10] Quantum criticality in an organic spin-liquid insulator κ-(BEDT-TTF)2Cu2(CN)3
    Isono, Takayuki
    Terashima, Taichi
    Miyagawa, Kazuya
    Kanoda, Kazushi
    Uji, Shinya
    [J]. NATURE COMMUNICATIONS, 2016, 7
12345