Effects of spin fluctuations in quasi-one-dimensional organic superconductors

被引：31

作者：

Kino, H ^{[1
]}

Kontani, H

机构：

[1] Joint Res Ctr Atom Technol, Ibaraki, Osaka 3050046, Japan

[2] Univ Tokyo, Inst Solid State Phys, Minato Ku, Tokyo 1068666, Japan

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1999年 / 68卷 / 05期

关键词：

quasi-one-dimensional organic conductors; Hubbard model; spin fluctuations; TMTSF; TMTTF; FLEX approximation; superconductivity; antiferromagnetism;

D O I：

10.1143/JPSJ.68.1481

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study the electronic states of quasi-one-dimensional organic conductors using the single band Hubbard model at half-filling. We treat the effects of the on-site Coulomb, interaction by the fluctuation-exchange (FLEX) method, and calculate the phase diagram and physical properties. The calculated pressure dependence of the Neel temperature coincides well with the experimental one. We also show that; a pseudogap is formed in the density of states near the chemical potential and that d-wave superconductivity appears next to the antiferromagnetic state. Moreover the NMR relaxation rate increases on cooling in the low-temperature region.

引用

页码：1481 / 1484

页数：4

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