Pairing and superconductivity driven by strong quasiparticle renormalization in two-dimensional organic charge transfer salts

被引：76

作者：

Liu, J ^{[1
]}

Schmalian, J

Trivedi, N

机构：

[1] Iowa State Univ Sci & Technol, Dept Phys & Astron, Ames, IA 50011 USA

[2] Iowa State Univ Sci & Technol, Ames Lab, Ames, IA 50011 USA

[3] Tata Inst Fundamental Res, Dept Theoret Phys, Bombay 400005, Maharashtra, India

[4] Ohio State Univ, Dept Phys, Columbus, OH 43210 USA

来源：

PHYSICAL REVIEW LETTERS | 2005年 / 94卷 / 12期

关键词：

D O I：

10.1103/PhysRevLett.94.127003

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We introduce and analyze a variational wave function for quasi-two-dimensional kappa-(ET)(2) organic salts containing strong local and nonlocal correlation effects. We find an unconventional superconducting ground state for intermediate charge carrier interaction, sandwiched between a conventional metal at weak coupling and a spin liquid at larger coupling. Most remarkably, the excitation spectrum is dramatically renormalized and is found to be the driving force for the formation of the unusual superconducting state.

引用

页数：4

共 42 条

[1] The physics behind high-temperature superconducting cuprates: the 'plain vanilla' version of RVB [J].

Anderson, PW ;

Lee, PA ;

Randeria, M ;

Rice, TM ;

Trivedi, N ;

Zhang, FC .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2004, 16 (24) :R755-R769

[2] THE RESONATING VALENCE BOND STATE IN LA2CUO4 AND SUPERCONDUCTIVITY [J].

ANDERSON, PW .

SCIENCE, 1987, 235 (4793) :1196-1198

[3] Tunneling spectroscopy on the organic superconductor κ-(BEDT-TTF)2Cu(NCS)2 using STM -: art. no. 104518 [J].

Arai, T ;

Ichimura, K ;

Nomura, K ;

Takasaki, S ;

Yamada, J ;

Nakatsuji, S ;

Anzai, H .

PHYSICAL REVIEW B, 2001, 63 (10)

[4] Mott insulator to high Tc superconductor via pressure:: Resonating valence bond theory and prediction of new systems -: art. no. 197007 [J].

Baskaran, G .

PHYSICAL REVIEW LETTERS, 2003, 90 (19) :4

[5] Heat conduction in κ-(BEDT-TTF)2Cu(NCS)2 [J].

Belin, S ;

Behnia, K ;

Deluzet, A .

PHYSICAL REVIEW LETTERS, 1998, 81 (21) :4728-4731

[6] Long-range Neel order in the triangular Heisenberg model [J].

Capriotti, L ;

Trumper, AE ;

Sorella, S .

PHYSICAL REVIEW LETTERS, 1999, 82 (19) :3899-3902

[7] MONTE-CARLO SIMULATION OF A MANY-FERMION STUDY [J].

CEPERLEY, D ;

CHESTER, GV ;

KALOS, MH .

PHYSICAL REVIEW B, 1977, 16 (07) :3081-3099

[8] Large-N solutions of the Heisenberg and Hubbard-Heisenberg models on the anisotropic triangular lattice:: application to Cs2CuCl4 and to the layered organic superconductors κ-(BEDT-TTF)2X (BEDT-TTF bis(ethylene-dithio)tetrathiafulvalene); X anion) [J].

Chung, CH ;

Marston, JB ;

McKenzie, RH .

JOURNAL OF PHYSICS-CONDENSED MATTER, 2001, 13 (22) :5159-5181

[9] C-13 NMR-STUDIES OF THE NORMAL AND SUPERCONDUCTING STATES OF THE ORGANIC SUPERCONDUCTOR KAPPA-(ET)(2)CU[N(CN)(2)]BR [J].

DESOTO, SM ;

SLICHTER, CP ;

KINI, AM ;

WANG, HH ;

GEISER, U ;

WILLIAMS, JM .

PHYSICAL REVIEW B, 1995, 52 (14) :10364-10368

[10] κ-(BEDT-TTF)2Cu[N(CN)2]Br:: A fully gapped strong-coupling superconductor [J].

Elsinger, H ;

Wosnitza, J ;

Wanka, S ;

Hagel, J ;

Schweitzer, D ;

Strunz, W .

PHYSICAL REVIEW LETTERS, 2000, 84 (26) :6098-6101

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