Continuous evolution of the 2D Hubbard model from an insulator to a metal

被引：1

作者：

Preuss, R ^{[1
]}

Putz, R ^{[1
]}

Hanke, W ^{[1
]}

VonDerLinden, W ^{[1
]}

机构：

[1] MAX PLANCK INST PLASMA PHYS,EURATOM ASSOC,D-85740 GARCHING,GERMANY

来源：

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 1995年 / 56卷 / 12期

关键词：

D O I：

10.1016/0022-3697(95)00101-8

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We present Quantum-Monte-Carlo results for the momentum and frequency dependent spectral weight A(k, omega) showing the evolution from insulating to metallic behavior in the two-dimensional Hubbard model. As observed in recent photoemission experiments for cuprates, in both undoped and doped cases the electronic excitations display two rather similar general features, i.e. a quasiparticle (QP)-like dispersive band of small width of the order of the exchange interaction J and a broad valence- and conduction-band background. Arguments for one and the same many-body physics namely the continuous reduction of the spin-spin correlation length and related changes in the QP-spin correlations behind the continuous evolution to the metallic QP dispersion are given.

引用

页码：1659 / 1661

页数：3

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