Two--magnon scattering and the spin--phonon interaction beyond the adiabatic approximation
Condensed Matter
2009-10-28 v1
Abstract
We consider a model of Raman scattering for a two--dimensional Heisenberg Anti-Ferromagnet which includes a {\it dynamical} spin--phonon interaction. We observe a broadening of the line shape due to increased coupling with excited high--energy spin states. Our results are close to a model of random static exchange interactions, first introduced in this context by Haas {\it et al.} [J. Appl. Phys. {\bf 75}, 6340, (1994)], which, when extended to large numbers of spins, explains experiments in the parent insulating compounds of high- superconductors.
Cite
@article{arxiv.cond-mat/9508089,
title = {Two--magnon scattering and the spin--phonon interaction beyond the adiabatic approximation},
author = {Matthew J. Reilly and A. G. Rojo},
journal= {arXiv preprint arXiv:cond-mat/9508089},
year = {2009}
}
Comments
14 pages (revtex format), 8 postscript figures