Flux state in the double-exchange model

被引：53

作者：

Yamanaka, M ^{[1
]}

Koshibae, W

Maekawa, S

机构：

[1] Sci Univ Tokyo, Dept Appl Phys, Shinjuku Ku, Tokyo 162, Japan

[2] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan

来源：

PHYSICAL REVIEW LETTERS | 1998年 / 81卷 / 25期

关键词：

D O I：

10.1103/PhysRevLett.81.5604

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study the ground-state properties of the double-exchange systems. The phase factor of the hopping amplitude arises from the t(2g) spin texture in two or more dimensions. A novel "flux" state has a lower energy than the canted antiferromagnetic and spiral spin states. In a certain range of hole doping, a phase separation occurs between the flux state and antiferromagnetic states. Constructing a trial state which provides the rigorous upper bound on the ground state, we show that the metallic canted antiferromagnetic state is not stable in the double-exchange model.

引用

页码：5604 / 5607

页数：4

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