Journal
PHYSICAL REVIEW LETTERS
Volume 97, Issue 4, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.97.046402
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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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