Two kinds of spin precession modes in diluted magnetic semiconductors

Details Two kinds of spin precession modes in diluted magnetic semiconductors Two kinds of spin precession modes in diluted magnetic semiconductors

2008-01-30

arxiv.org/abs/0801.4756v2

Physics

Condensed Matter

Other Condensed Matter

Scientific paper

Time-resolved Kerr rotation experiments show that two kinds of spin modes exist in diluted magnetic semiconductors: (i) coupled electron-magnetic ion spin excitations and (ii) excitations of magnetic ion spin subsystem, which are decoupled from electron spins. The latter modes exhibit much longer spin coherence time and require a description, which goes beyond the mean field approximation.

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