DYNAMICAL STRUCTURE FACTOR FOR s - f MODEL WITH SPIN-PHONON INTERACTION
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Published:1996-10-10
Issue:22
Volume:10
Page:2797-2809
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ISSN:0217-9792
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Container-title:International Journal of Modern Physics B
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language:en
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Short-container-title:Int. J. Mod. Phys. B
Author:
WESSELINOWA J. M.1,
APOSTOLOV A. T.1
Affiliation:
1. University of Sofia, Faculty of Physics, Blvd. J. Bouchier 5, 1126 Sofia, Bulgaria
Abstract
A Green's function technique is used to study the effects of spin–phonon interaction in ferromagnetic semiconductors based on the s - f model. The spin wave energy and the damping are evaluated for the first time beyond the RPA and numerically calculated. They increase with increasing spin–phonon interaction. The dependence of the dynamical structure factor on temperature and on spin–phonon interaction is discussed. At fixed T with increasing spin–phonon interaction the peak height decreases, the half-width increases, whereas the peak shifts to higher energy values.
Publisher
World Scientific Pub Co Pte Lt
Subject
Condensed Matter Physics,Statistical and Nonlinear Physics