Manganese nanoclusters and nanowires on GaAs surfaces

Details Manganese nanoclusters and nanowires on GaAs surfaces Manganese nanoclusters and nanowires on GaAs surfaces

2002-08-19

arxiv.org/abs/cond-mat/0208370v1

Physics

Condensed Matter

Materials Science

17 pages (includes 2 tables and 3 figures)

Scientific paper

10.1103/PhysRevB.67.125317

We have computed the local magnetic moments of manganese and neighboring arsenic for various cluster configurations on the (001) surface of GaAs bulk crystal using a cluster of 512 atoms. We obtained for manganese a substantial local magnetic moment of 3.66 Bohr magnetons for all cases considered. The induced magnetic moment of arsenic is less than that of manganese by two orders of magnitude and falls off drastically beyond nearest neighbor distance. A small amount of charge is transferred from the manganese to arsenic. The possibility of a spin polarized wire channel on the arsenic layer below the surface is suggested.

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