EXACT SOLUTION OF A HUBBARD CHAIN WITH BOND-CHARGE INTERACTION

被引：132

作者：

ARRACHEA, L

ALIGIA, AA

机构：

[1] COMIS NACL ENERGIA ATOM,INST BALSEIRO,RA-8400 BARILOCHE,RIO NEGRO,ARGENTINA

[2] UNIV NACL LA PLATA,DEPT FIS,RA-1900 LA PLATA,ARGENTINA

来源：

PHYSICAL REVIEW LETTERS | 1994年 / 73卷 / 16期

关键词：

D O I：

10.1103/PhysRevLett.73.2240

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We obtain the exact solution of a general Hubbard chain with kinetic energy t, bond-charge interaction X, and on-site repulsion U with the only restriction t = X. At zero temperature and half filling, the model exhibits a Mott transition at U = 4t. In the metallic phase and near half filling, superconducting states are part of the degenerate ground state and are favored for small LI if the system is slightly perturbed.

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页码：2240 / 2243

页数：4

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