A possible route to grow a (Mn:Si(1-x)Gex)-based diluted magnetic semiconductor
Materials Science
2007-05-23 v1
Abstract
We systematically investigate, using ab initio density-functional theory calculations, the properties of interstitial and substitutional Mn in both Si and Ge, as well as in the Si(1-x)Gex alloy. We show that volume effects are not the main reason Mn prefers to be a subsitutional impurity in pure Ge, and chemical effects, therefore, play an important role. Using realistic models of Si(1-x)Gex, we show that for x approximately greater than 0.16 substitutional Mn in Ge-rich neighborhoods become more stable than interstitial Mn, which may allow the growth of Si-based diluted magnetic semiconductors.
Cite
@article{arxiv.cond-mat/0310770,
title = {A possible route to grow a (Mn:Si(1-x)Gex)-based diluted magnetic semiconductor},
author = {Antonio J. R. da Silva and A. Fazzio and A. Antonelli},
journal= {arXiv preprint arXiv:cond-mat/0310770},
year = {2007}
}
Comments
4 pages, 1 figure. Submitted for publication on October, 29th, 2003