Indications of a metallic antiferromagnetic phase in the two-dimensional U-t-t' model

被引：25

作者：

Duffy, D ^{[1
]}

Moreo, A ^{[1
]}

机构：

[1] FLORIDA STATE UNIV,MARTECH,TALLAHASSEE,FL 32306

来源：

PHYSICAL REVIEW B | 1997年 / 55卷 / 02期

关键词：

D O I：

10.1103/PhysRevB.55.R676

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We present mean-field and quantum Monte Carlo results that suggest the existence of an itinerant antiferromagnetic ground state in the half-filled U-t-t' model in two dimensions. In particular, working at t'/t= -0.2 we found that antiferromagnetic long-range order develops at U-ci/t approximate to 2.5+/-0.5, while a study of the density of states N(omega) and the response to an external magnetic field indicates that the system becomes insulating at a larger coupling 4 < U-C2/t<6.

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页码：R676 / R679

页数：4

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