THE EFFECT OF A BOND-SITE INTERACTION ON THE GROUND-STATE INSTABILITIES OF THE ONE-DIMENSIONAL HUBBARD-MODEL

被引：3

作者：

BUZATU, FD ^{[1
]}

机构：

[1] INST ATOM PHYS,INST PHYS & NUCL ENGN,DEPT THEORET PHYS,R-76900 MAGURELE,ROMANIA

来源：

INTERNATIONAL JOURNAL OF MODERN PHYSICS B | 1995年 / 9卷 / 12期

关键词：

D O I：

10.1142/S0217979295000653

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The ground-state instabilities for a one-dimensional lattice system of electrons with onsite (Hubbard) and bond-site (hopping) interactions are analyzed in a perturbative approach. The zero temperature phsae diagram at different band fillings is drawn; an attractive (repulsive) bond-site interaction favors the appearance of a superconductor state at low concentrations of electrons (holes). A comparison with the exact results for the Hubbard model and previous works for particular cases is also discussed.

引用

页码：1503 / 1514

页数：12

共 24 条

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