Electron correlation, metal-insulator transition and superconductivity in quasi-2D organic systems, (ET)(2)X

被引：261

作者：

Kanoda, K

机构：

[1] Institute for Molecular Science, Myodaiji

来源：

PHYSICA C | 1997年 / 282卷

关键词：

D O I：

10.1016/S0921-4534(97)00266-9

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A family of quasi-two-dimensional organic systems, (ET)(2)X, have been studied by NMR, susceptibility and specific heat measurements in the light of role of electron correlation. A systematic variation of antiferromagnetic spin fluctuations toward metal(superconductor)-to-insulator transition and the ordered spin structure in the insulating phase are uncovered. Based on the results, we propose a conceptual phase diagram for (ET)(2)X, where the kappa-type of family span a critical region of Mott transition. The superconductivity, which is enhanced near the Mott transition, is suggested to have line nodes in gap parameter by NMR relaxation and specific heat profiles.

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页码：299 / 302

页数：4

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