Mott transition, antiferromagnetism, and d-wave superconductivity in two-dimensional organic conductors

被引：190
作者：
Kyung, B. [1 ]
Tremblay, A. -M. S.
机构：
[1] Univ Sherbrooke, Dept Phys, Sherbrooke, PQ J1K 3R1, Canada
[2] Univ Sherbrooke, Regrp Quebecois Mat Pointe, Sherbrooke, PQ J1K 3R1, Canada
来源：
PHYSICAL REVIEW LETTERS | 2006年 / 97卷 / 04期
关键词：
D O I：
10.1103/PhysRevLett.97.046402
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We study the Mott transition, antiferromagnetism, and superconductivity in layered organic conductors using the cellular dynamical mean-field theory for the frustrated Hubbard model. A d-wave superconducting phase appears between an antiferromagnetic insulator and a metal for t(')/t=0.3-0.7 or between a nonmagnetic Mott insulator (spin liquid) and a metal for t(')/t >= 0.8, in agreement with experiments on layered organic conductors including kappa-(ET)(2)Cu-2(CN)(3). These phases are separated by a strong first-order transition. The phase diagram gives much insight into the mechanism for d-wave superconductivity. Two predictions are made.
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页数：4
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