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

页码：715 / 716

页数：2

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