arXiv subjects

V. I. Belitsky

Publications and source records attributed to V. I. Belitsky.

2 recordsLinked to original sources

arXiv1996

Magnetic Field-Induced Fano Profiles in the Absorption Coefficient of Semiconductors

A strongly asymmetric, Fano-like resonance profile has been found for magneto-absorption in the states of hot free electron-hole pairs scattered by defects in bulk semiconductors. The renormalization of the absorption profile, compared to that expected from the bare density of states in a high magnetic field, follows from a quasi-one-dimensional character of electronic excitations. The results are valid for absorption by the electronic states of large Landau quantum number where the Coulomb interaction should play a minor role. The resonance shape is in a good qualitattive agreement with experimental observations.

cond-mat↗

arXiv1996

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

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.

cond-mat↗