A new mean-field superconducting phase in two-dimensional t-J model near half-filling

被引：19

作者：

Ogata, M

机构：

[1] Department of Basic Science, Graduate School of Arts and Sciences, University of Tokyo, Tokyo, 3-8-1 Komaba, Meguro-ku

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 1997年 / 66卷 / 11期

关键词：

two-dimensional t-J model; d-wave superconductivity; mixed phase; Gutzwiller approximation;

D O I：

10.1143/JPSJ.66.3375

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A new superconducting phase is found in the two-dimensional t-J model near half-filling within the mean-field theory and Gutzwiller approximation. This state has a spatial dependence of order parameters which is interpreted as a mixing of the extended s-wave component with the finite total momentum in addition to the d(x2-y2)-wave symmetry. The origin of this peculiar pairing is investigated. There is no node in the gap function in the new state and possible experimental consequences are discussed.

引用

页码：3375 / 3378

页数：4

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