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arxiv: 0801.4756 · v2 · submitted 2008-01-30 · ❄️ cond-mat.other

Two kinds of spin precession modes in diluted magnetic semiconductors

classification ❄️ cond-mat.other
keywords spinmagneticmodesdilutedexcitationskindssemiconductorsapproximation
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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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