ENERGY WIDTH OF SPIN WAVES IN HEISENBERG FERROMAGNET

被引：69

作者：

HARRIS, AB

机构：

[1] Department of Physics, University of Pennsylvania, Philadelphia

来源：

PHYSICAL REVIEW | 1968年 / 175卷 / 02期

关键词：

D O I：

10.1103/PhysRev.175.674

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A calculation of the energy width of spin waves whose energy is small compared to kT in a Heisenberg ferromagnet is presented. Full account is taken of all two-particle processes. For 2JSkT1 and 2JSa22kT1, the energy width of a spin wave of wave number is 4T2[A+Bln(kT2JSa22)+Cln2(kT2JSa22)]. The disagreement with some previous treatments is explained physically by their neglect of two many-body effects. © 1968 The American Physical Society.

引用

页码：674 / &