Singlet/triplet transition in a two-band organic superconductor

被引：1
|
作者：
Abramovici, G. [1 ]
Belmechri, N. [1 ]
Heritier, M. [1 ]
机构：
[1] Univ Paris 11, CNRS, UMR 8502, Phys Solides Lab, F-91405 Orsay, France
来源：
SOLID STATE SCIENCES | 2008年 / 10卷 / 12期
关键词：
Superconductors; Strongly interacting electrons; Magnetism; Triplet symmetry; Singlet symmetry; Phase transition;
D O I：
10.1016/j.solidstatesciences.2008.01.029
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
We study quasi-one-dimensional organic superconductors with two-band dispersion. We use spin ladder approximation with the Hubbard model. We determine the symmetry of the Cooper pairing by calculating the free energy. Thanks to close values of singlet and triplet scatterings, the phase diagram reveals that, at high magnetic field, the triplet configuration is more favorable, indicating a transition from singlet superconducting state at low fields to triplet one. This result confirms similar ones in one-band system and can explain recent experimental results on (TMTSF)(2)ClO4. (C) 2008 Elsevier Masson SAS. All rights reserved.
引用
收藏
页码：1790 / 1793
页数：4
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