Ferromagnetism in magnetically doped III-V semiconductors

Details Ferromagnetism in magnetically doped III-V semiconductors Ferromagnetism in magnetically doped III-V semiconductors

2001-01-25

arxiv.org/abs/cond-mat/0101389v1

Physics

Condensed Matter

Materials Science

4 pages with 3 figures

Scientific paper

10.1103/PhysRevLett.86.5593

The origin of ferromagnetism in semimagnetic III-V materials is discussed. The indirect exchange interaction caused by virtual electron excitations from magnetic impurity level in the bandgap to the valence band can explain ferromagnetism in GaAs(Mn) no matter samples are degenerated or not. Formation of ferromagnetic clusters and percolation picture of phase transition describes well all available experimental data and allows to predict the Mn-composition dependence of transition temperature in wurtzite (Ga,In,Al)N epitaxial layers.

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