INPLANE DYNAMICS OF THE CLASSICAL 2-DIMENSIONAL EASY-PLANE HEISENBERG-MODEL AT LOW-TEMPERATURES

被引：17

作者：

MENEZES, SL ^{[1
]}

PIRES, AST ^{[1
]}

GOUVEA, ME ^{[1
]}

机构：

[1] UNIV FED MINAS GERAIS, INST CIENCIAS EXATAS, DEPT FIS, BELO HORIZONTE, MG, BRAZIL

来源：

PHYSICAL REVIEW B | 1993年 / 47卷 / 18期

关键词：

D O I：

10.1103/PhysRevB.47.12280

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have calculated the in-plane dynamical structure factor S(parallel-to)(q,omega) of the two-dimensional classical Heisenberg model with easy-plane anisotropy at low temperatures using the projection-operator technique. Beside the characteristic power-law singularity at the spin-wave frequency, we have found that S(parallel-to)(q,omega) diverges logarithmically as omega-->0 for finite values of q.

引用

页码：12280 / 12283

页数：4

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