The effect of the spin-orbit interaction on the band gap of half-metals

Details The effect of the spin-orbit interaction on the band gap of half-metals The effect of the spin-orbit interaction on the band gap of half-metals

2003-08-07

arxiv.org/abs/cond-mat/0308146v1

Phys. Rev. B 69, 054424 (2004)

Physics

Condensed Matter

Materials Science

5 pages, 3 figures

Scientific paper

10.1103/PhysRevB.69.054424

The spin-orbit interaction can cause a nonvanishing density of states (DOS) within the minority-spin band gap of half-metals around the Fermi level. We examine the magnitude of the effect in Heusler alloys, zinc-blende half metals and diluted magnetic semiconductors, using first-principles calculations. We find that the ratio of spin-down to spin-up DOS at the Fermi level can range from below 1% (e.g. 0.5% for NiMnSb) over several percents (4.2% for (Ga,Mn)As) to 13% for MnBi.

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