Superconductivity mediated by charge fluctuations in layered molecular crystals

被引：194

作者：

Merino, J ^{[1
]}

McKenzie, RH ^{[1
]}

机构：

[1] Univ Queensland, Dept Phys, Brisbane, Qld 4072, Australia

来源：

PHYSICAL REVIEW LETTERS | 2001年 / 87卷 / 23期

关键词：

D O I：

10.1103/PhysRevLett.87.237002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We consider the competition between superconducting, charge ordered, and metallic phases in layered molecular crystals with the theta and beta" structures. Applying slave-boson theory to the relevant extended Hubbard model, we show that the superconductivity is mediated by charge fluctuations and the Cooper pairs have d(xy) symmetry. This is in contrast to the kappa-(BEDT-TTF)(2)X family, for which theoretical calculations give superconductivity mediated by spin fluctuations and with d(x)2(-y)2 symmetry. We predict several materials that should become superconducting under pressure.

引用

页码：2370021 / 2370024

页数：4

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