Coherently photoinduced ferromagnetism in diluted magnetic semiconductors.

نویسندگان

  • J Fernández-Rossier
  • C Piermarocchi
  • P Chen
  • A H MacDonald
  • L J Sham
چکیده

Ferromagnetism is predicted in undoped diluted magnetic semiconductors illuminated by intense sub-band-gap laser radiation. The mechanism for photoinduced 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 1K.

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عنوان ژورنال:
  • Physical review letters

دوره 93 12  شماره 

صفحات  -

تاریخ انتشار 2004