Department of Physics Papers

Document Type

Journal Article

Date of this Version

11-10-1968

Publication Source

Physical Review

Volume

175

Issue

2

Start Page

674

Last Page

679

DOI

10.1103/PhysRev.175.674

Abstract

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 2JS/kT≫1 and 2JSa2λ2/kT≪1, the energy width Δωλ of a spin wave of wave number λ is Δωλ4T2[A+Bln(kT/2JSa2λ2)+Cln2(kT/2JSa2λ2)]. The disagreement with some previous treatments is explained physically by their neglect of two many-body effects.

Comments

An Erratum for this article, published at Phys. Rev. 184, 606 (1969), is included as an additional file.

Additional Files

energy width erratum.pdf (96 kB)
Erratum

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Date Posted: 20 August 2015

This document has been peer reviewed.