SPIN DYNAMICS OF THE TRIANGULAR HEISENBERG-ANTIFERROMAGNET - A SCHWINGER-BOSON APPROACH

被引：7

作者：

MATTSSON, A ^{[1
]}

机构：

[1] UNIV GOTHENBURG,S-41296 GOTHENBURG,SWEDEN

来源：

PHYSICAL REVIEW B | 1995年 / 51卷 / 17期

关键词：

D O I：

10.1103/PhysRevB.51.11574

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have analyzed the two-dimensional antiferromagnetic Heisenberg model on the triangular lattice using a Schwinger-boson mean-field theory. By expanding around a state with local 120°order, we obtain, in the limit of infinite spin, results for the excitation spectrum in complete agreement with linear spin-wave theory (LSWT). In contrast to LSWT, however, the modes at the ordering wave vectors acquire a mass for finite spin. We discuss the origin of this effect. © 1995 The American Physical Society.

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页码：11574 / 11579

页数：6

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