SINGLE-PARTICLE SELF-ENERGY AND OPTICAL CONDUCTIVITY OF THE SIMPLIFIED HUBBARD-MODEL

被引：11

作者：

DEVRIES, P ^{[1
]}

MICHIELSEN, K ^{[1
]}

DERAEDT, H ^{[1
]}

机构：

[1] UNIV GRONINGEN, CTR MAT SCI, 9747 AG GRONINGEN, NETHERLANDS

来源：

ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER | 1994年 / 95卷 / 04期

关键词：

D O I：

10.1007/BF01313355

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

It is shown that the single-particle self-energy of the one and two-dimensional simplified Hubbard model exhibits different behavior characterized by Fermi-liquid, non-Fermi-liquid quasiparticle, or non-quasiparticle excitations, as a function of the strength of the on-site Coulomb repulsion U, temperature, and electron filling. For half-filled lattices, results for the optical conductivity indicate that the d.c. conductivity is zero for all temperatures and U>0.

引用

页码：475 / 479

页数：5

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