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arxiv: cond-mat/9602117 · v1 · submitted 1996-02-21 · ❄️ cond-mat

Magnetic-field-enhanced outgoing excitonic resonance in multi-phonon Raman scattering from polar semiconductors

I.G.Lang (1) , A.V.Prokhorov (1) , M.Cardona (2) , V.I.Belitsky (3) , A.Cantarero (3) , S.T.Pavlov (1 , 3) ((1) A.F.Ioffe Physico-Technical Institute , St. Petersburg
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Russia (2) Max-Planck-Institute fuer FKF Stuttgart Germany (3) University of Valencia Valencia Spain)
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classification ❄️ cond-mat
keywords scatteringexcitonicoutgoingresonancediscreteefficiencyexcitonsfield
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A combined scattering mechanism involving the states of free electron-hole pairs (exciton continuum) and discrete excitons as intermediate states in the multi-phonon Raman scattering leads to (1) a strong increase of the scattering efficiency in the presence of a high magnetic field and to (2) an outgoing excitonic resonance: the two features are not compatible when only free pairs (leading to a strong increase of the scattering efficiency under the applied magnetic field) or discrete excitons (resulting in the outgoing resonance at the excitonic gap) are taken into account.

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