ORDER FROM DISORDER IN A KAGOME ANTIFERROMAGNET

被引：237

作者：

CHUBUKOV, A

机构：

[1] UNIV CALIF SANTA BARBARA, INST THEORET PHYS, SANTA BARBARA, CA 91106 USA

[2] PL KAPITZA PHYS PROBLEMS INST, MOSCOW, RUSSIA

来源：

PHYSICAL REVIEW LETTERS | 1992年 / 69卷 / 05期

关键词：

D O I：

10.1103/PhysRevLett.69.832

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A Heisenberg antiferromagnet on a kagome lattice is highly degenerate in the classical limit. I show that quantum fluctuations lift the degeneracy and yield the low-energy branch of spin-wave excitations with a velocity which is a factor S-1/3 smaller than for conventional spin waves. The relevance of these results to the experiments on the stacked kagome antiferromagnet SrCr8-xGa4+xO19 is discussed.

引用

页码：832 / 835

页数：4

共 37 条

[1]

[Anonymous], 1990, PHYS REV B

[2] ANTIFERROMAGNETIC FLUCTUATIONS AND SHORT-RANGE ORDER IN A KAGOME LATTICE [J].