SUPERCONDUCTIVITY IN AN EXACTLY SOLVABLE HUBBARD-MODEL WITH BOND-CHARGE INTERACTION

被引：86

作者：

SCHADSCHNEIDER, A ^{[1
]}

机构：

[1] SUNY STONY BROOK,INST THEORET PHYS,STONY BROOK,NY 11794

来源：

PHYSICAL REVIEW B | 1995年 / 51卷 / 16期

关键词：

D O I：

10.1103/PhysRevB.51.10386

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The Hubbard model with an additional bond-charge interaction X is solved exactly in one dimension for the case t=X, where t is the hopping amplitude. In this case the number of doubly occupied sites is conserved. In the sector with no double occupations the model reduces to the U= Hubbard model. In arbitrary dimensions the qualitative form of the phase diagram is obtained. It is shown that for moderate Hubbard interactions U the model has superconducting ground states. © 1995 The American Physical Society.

引用

页码：10386 / 10391

页数：6

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