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

被引：85
|
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.
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页码：10386 / 10391
页数：6
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