Dynamical mean-field theory for doped antiferromagnets

被引：34

作者：

Fleck, M

Liechtenstein, AI

Oles, AM

Hedin, L

Anisimov, VI

机构：

[1] Max Planck Inst Festkorperforsch, D-70569 Stuttgart, Germany

[2] Forschungszentrum Julich, D-52425 Julich, Germany

[3] Russian Acad Sci, Inst Phys Met, Ekaterinburg 620219, Russia

来源：

PHYSICAL REVIEW LETTERS | 1998年 / 80卷 / 11期

关键词：

D O I：

10.1103/PhysRevLett.80.2393

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We have generalized the dynamical mean-field theory to study the doping dependence of the crossover from antiferromagnetic to short-range order modeled by an incommensurate spin density wave in the Hubbard model. The local self-energy which includes spin fluctuations gives quasiparticle weights and spectral properties in good agreement with quantum Monte Carlo and exact diagonalization data in two dimensions. The spectra at finite doping are characterized by a Mott-Hubbard "gap" accompanied by a pseudogap induced by the local spin order.

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页码：2393 / 2396

页数：4

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