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Coherently photo-induced ferromagnetism in diluted magnetic semiconductors

J. Fernández-Rossier·C. Piermarocchi·P. Chen·A. H. MacDonald·L. J. Sham
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Abstract

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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J. Fernández-Rossier, C. Piermarocchi, P. Chen, A. H. MacDonald, L. J. Sham. 2003-12-18. Coherently photo-induced ferromagnetism in diluted magnetic semiconductors. https://doi.org/10.1103/physrevlett.93.127201

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