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RESEARCH PRODUCT
Two-phonon magneto-Raman scattering in quantum wells: Fröhlich interaction
V. I. BelitskyAndrés CantareroAna Crossubject
Condensed matter physicsScatteringChemistryPhononCondensed Matter::Mesoscopic Systems and Quantum Hall EffectCondensed Matter PhysicsResonance (particle physics)Spectral lineElectronic Optical and Magnetic MaterialsMagnetic fieldCondensed Matter::Materials Sciencesymbols.namesakesymbolsRaman spectroscopyRaman scatteringQuantum welldescription
We have developed a theoretical model of two-phonon resonant magneto-Raman scattering in a semiconductor quantum well (QW). Frohlich electron-phonon interaction has been considered and the corresponding selection rules are derived for Faraday geometry and backscattering configuration. The resonant profiles are analyzed as a function of magnetic field and laser energy. To simplify the discussion a three-band model with parabolic masses has been used as a first approach, studying later the role of heavy-hole light-hole admixture in the scattering process. It is shown that, due to mixing effects, Frohlich interaction contributes to the two-phonon Raman spectra in the parallel (z(σ ± , σ ± ) z) and also in the usually forbidden crossed (z(σ ± ,σ ± )z) polarizations. The model has been used to calculate the two-phonon magneto-Raman spectra of a 35 A GaAs/AlAs QW as an example.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 1996-12-01 |