0000000000423076

AUTHOR

I. G. Lang

showing 3 related works from this author

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

1996

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.

PhysicsCondensed Matter::OtherPhononScatteringExcitonCondensed Matter (cond-mat)Continuum (design consultancy)FOS: Physical sciencesCondensed MatterCondensed Matter::Mesoscopic Systems and Quantum Hall EffectCondensed Matter PhysicsMolecular physicsResonance (particle physics)Magnetic fieldCondensed Matter::Materials Sciencesymbols.namesakesymbolsPolarGeneral Materials ScienceRaman scatteringJournal of Physics: Condensed Matter
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Triple magnetopolarons in quantum wells

1997

We derive the equations for eigenstates and eigenenergies of a triple magnetopolaron in quantum-well structures. An iteration procedure for obtaining the wave function and energy including the contributions of diagrams with crossing phonon lines is given. We show that under conditions of exact resonance the middle energy branch of the triply split magnetopolaron state consists of only two out of three bare states. We suggest the experimental verification of this prediction.

PhysicsExact resonancePhononQuantum mechanicsHeterojunctionFunction (mathematics)State (functional analysis)Condensed Matter::Mesoscopic Systems and Quantum Hall EffectQuantum wellEnergy (signal processing)Eigenvalues and eigenvectorsPhysical Review B
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Spatial correlation of laser-generated electrons and holes in quantum wells

1995

The spatial correlation of hot electrons and holes generated by light in a semiconductor quantum well (QW) is studied. For hot electron-hole pairs in a polar material, this correlation is determined by the interaction with LO-phonons. We analyze the distribution F N (r, K) of electrons and holes which are created in a given light absorption process, with respect to their relative separation r and total quasimomentum ħK, after the emission of a number N of LO-phonons. The relationship between the spatial distribution of electrons and holes in these intermediate states and the cross-section of multi-phonon resonant Raman scattering (MPRRS) is established. Spatial correlation effects are stron…

PhysicsSpatial correlationbusiness.industryQuantum-confined Stark effectElectronCondensed Matter PhysicsLaserSpatial distributionElectronic Optical and Magnetic Materialslaw.inventionsymbols.namesakeSemiconductorlawsymbolsAtomic physicsbusinessRaman scatteringQuantum wellphysica status solidi (b)
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