SLAVE-BOSON MEAN FIELD VERSUS QUANTUM MONTE-CARLO RESULTS FOR THE HUBBARD-MODEL

被引：97

作者：

LILLY, L

MURAMATSU, A

HANKE, W

机构：

[1] Physikalisches Institut, Universität Ẅrzburg

来源：

PHYSICAL REVIEW LETTERS | 1990年 / 65卷 / 11期

关键词：

D O I：

10.1103/PhysRevLett.65.1379

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The one-band Hubbard model is considered in the slave-boson formulation first introduced by Kotliar and Ruckenstein. It is shown that a mean-field approximation, where broken-symmetry states appropriate for a bipartite lattice are allowed, leads to a quantitative agreement with quantum Monte Carlo results for local observables over a wide range of interactions (0<U20t) and doping (0<n1). Thus, our saddle-point solutions constitute an excellent starting point for a systematic treatment of fluctuations. © 1990 The American Physical Society.

引用

页码：1379 / 1382

页数：4

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