GROUND-STATE PROPERTIES OF THE 2-DIMENSIONAL HUBBARD-MODEL

被引：26
|
作者：
LIN, HQ
机构：
来源：
PHYSICAL REVIEW B | 1991年 / 44卷 / 13期
关键词：
D O I：
10.1103/PhysRevB.44.7151
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Using all appropriate symmetries for a two-dimensional square system, we have been able to diagonalize exactly the Hubbard Hamiltonian on the 4 x 4 and 18-site lattices. We calculate the ground-state energies, hole-hole interactions, and various correlation functions as functions of the Coulomb repulsion U and band filling, and compare the Hubbard-model results with those obtained from the t-J and strong-coupling models.
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页码：7151 / 7154
页数：4
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