Physics – Condensed Matter – Materials Science
Scientific paper
2010-10-27
Eur. Phys. J. B 81, 405--409 (2011)
Physics
Condensed Matter
Materials Science
5 pages, 5 figures, Text and some figures revised to match the accepted version
Scientific paper
10.1140/epjb/e2011-20320-x
We provide a quantitative theoretical model study of the dynamical magnetic properties of optimally annealed Ga$_{1-x}$Mn$_x$As. This model has already been shown to reproduce accurately the Curie temperatures for Ga$_{1-x}$Mn$_x$As. Here we show that the calculated spin stiffness are in excellent agreement with those which were obtained from ab-initio based studies. In addition, an overall good agreement is also found with available experimental data. We have also evaluated the magnon density of states and the typical density of states from which the "mobility edge", separating the extended from localized magnon states, was determined. The power of the model lies in its ability to be generalized for a broad class of diluted magnetic semiconductor materials, thus it bridges the gap between first principle calculations and model based studies.
Bouzerar Richard
Chakraborty Akash
~Bouzerar Georges
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