SINGLE-HOLE STATE IN HALF-FILLED 2D HUBBARD-MODEL

被引：2

作者：

LO, CF

机构：

[1] Department of Physics, Florida State University, Tallahassee, 32306-3016, FL

来源：

NUOVO CIMENTO DELLA SOCIETA ITALIANA DI FISICA D-CONDENSED MATTER ATOMIC MOLECULAR AND CHEMICAL PHYSICS FLUIDS PLASMAS BIOPHYSICS | 1991年 / 13卷 / 01期

关键词：

D O I：

10.1007/BF02451281

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have investigated the ground state of a single hole in the half-filled Hubbard model in a 2D square lattice using the coupled-cluster method. In particular we obtained an analytical expression of the hole energy dispersion function epsilon-(k) which is consistent with earlier studies on the t-J model in the strong-coupling limit. An appreciable discrepancy on the hole energy bandwidth is, however, observed between the Hubbard model and the t-J model. We believe that this discrepancy is due to the absence of the three-site interaction term in the t-J model.

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页码：127 / 130

页数：4

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