Mott transition in the two-dimensional Hubbard model

被引：3
|
作者：
Pérez-Navarro, A [1 ]
Costa-Quintana, J [1 ]
López-Aguilar, F [1 ]
机构：
[1] Univ Autonoma Barcelona, Grp Electromagnetisme, CN, Barcelona 08193, Spain
来源：
PHYSICA B-CONDENSED MATTER | 1999年 / 259-61卷
关键词：
electronic structure; high-T-c superconductors; self-energy;
D O I：
10.1016/S0921-4526(98)00780-7
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
We are interested in the description of the Mott-Hubbard transition from a perturbation theory arising from a two-dimensional Hubbard model. The self-energy within the random phase approximation presents some inconsistencies; one of them is that its imaginary part presents more than one zero, which is a violation of the Luttinger theorem. We use a Bogolyubov transformation and within a spin density wave mean held, we recalculate the self-energy in the new ground state, and it is able to describe the Mott-Hubbard transition, satisfying the Luttinger condition. (C) 1999 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：715 / 716
页数：2
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