On the Hubbard model at half filling

被引：0

作者：

Djajaputra, D ^{[1
]}

Ruvalds, J ^{[1
]}

机构：

[1] Univ Virginia, Dept Phys, Charlottesville, VA 22901 USA

来源：

SOLID STATE COMMUNICATIONS | 1998年 / 108卷 / 12期

关键词：

high T-c superconductors; electron-electron interactions; spin dynamics;

D O I：

10.1016/S0038-1098(98)00487-6

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We show that particle-hole symmetry in the half-filled Hubbard model leads to cancellation of a large class of diagrams with loops. Using this cancellation we show that at half filling the self energy is an even function of U and the charge and longitudinal spin susceptibilities are related by a simple change of sign of the Coulomb energy U. (C) 1998 Elsevier Science Ltd. All rights reserved.

引用

页码：899 / 901

页数：3

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