MEAN-FIELD GROUND-STATE OF THE T-J MODEL

被引：1

作者：

BULKA, BR

机构：

来源：

EUROPHYSICS LETTERS | 1992年 / 17卷 / 8BIS期

关键词：

SUPERCONDUCTIVITY; THEORY; NARROW-BAND SYSTEMS; HEAVY-FERMION METALS; INTERMEDIATE-VALENCE SOLIDS; BAND AND ITINERANT MODELS;

D O I：

10.1209/0295-5075/17/8/012

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The ground state of the t-J model is studied in the mean-field formalism for a different concentration of holes. It is shown that at the half-filled band the most stable solution is the antiferromagnetic state. Hole doping stabilizes the superconductivity of the mixed s- and d-type symmetry and simultaneously suppresses the antiferromagnetism. Neither the flux state nor the CDW can appear in the model. The results are compared with those for the extended Hubbard model.

引用

页码：733 / 738

页数：6