Coexistence of dx2-y2 superconductivity and antiferromagnetism in the two-dimensional t-J model and numerical estimation of Gutzwiller factors

被引：120

作者：

Himeda, A ^{[1
]}

Ogata, M ^{[1
]}

机构：

[1] Univ Tokyo, Grad Sch Arts & Sci, Dept Basic Sci, Meguro Ku, Tokyo 1538902, Japan

来源：

PHYSICAL REVIEW B | 1999年 / 60卷 / 14期

关键词：

D O I：

10.1103/PhysRevB.60.R9935

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The coexisting phase of the d-wave superconducting and the antiferromagnetic order in the two-dimensional t-J model is reexamined using a variational Monte Carlo method in order to estimate the Gutzwiller factors. A trial wave function is used which is consistent with the mean-field solution. The Gutzwiller factors are determined by comparing the numerically obtained expectation values with the mean-field values. We find the z component of the Gutzwiller factor of exchange interaction is enhanced compared with the xy components. This effect does not appear in the conventional Gutzwiller approximation and is essential for the stabilization of the antiferromagnetic order in the presence of d-wave superconductivity. We discuss several applications of the present Gutzwiller factors to the problems with antiferromagnetism and d-wave superconductivity. [S0163-1829(99)51538-5].

引用

页码：R9935 / R9938

页数：4

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