Coherently photo-induced ferromagnetism in diluted magnetic semiconductors

Details Coherently photo-induced ferromagnetism in diluted magnetic semiconductors Coherently photo-induced ferromagnetism in diluted magnetic semiconductors

2003-12-18

arxiv.org/abs/cond-mat/0312445v1

Phys. Rev. Lett. 93, 127201 (2004)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

11 pages, 2 figures, preprint style

Scientific paper

10.1103/PhysRevLett.93.127201

Ferromagnetism is predicted in undoped diluted magnetic semiconductors illuminated by intense sub-bandgap laser radiation . The mechanism for photo-induced ferromagnetism is coherence between conduction and valence bands induced by the light which leads to an optical exchange interaction. The ferromagnetic critical temperature T_C depends both on the properties of the material and on the frequency and intensity of the laser and could be above 1 K.

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