Can half metallic zincblende MnAs be grown?

Details Can half metallic zincblende MnAs be grown? Can half metallic zincblende MnAs be grown?

2000-04-11

arxiv.org/abs/cond-mat/0004184v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

11 pages, 12 figures

Scientific paper

In this paper we investigate theoretically the ground state NiAs-type structure of MnAs and we compare the magnetic and structural properties with an hypothetical zincblende structure. A zincblende structure can be obtained, in principle, from the diluted magnetic semiconductor Ga$_{1-x}$Mn$_x$As in the limit $x=1$. Using density functional calculations within the local spin-density approximation (LSDA), we show that the zincblende structure, although showing half metallic behavior which is very attractive for spintronics, can not be stabilized at equilibrium. We perform a tight-binding analysis of the Mn-As bond in the tetrahedral coordination to investigate the nature of the bonding in diluted magnetic semiconductors.

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