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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 2:10 |
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Conference: Bucharest University Faculty of Physics 2001 Meeting
Section: Solid State Physics and Materials Science
Title:
Two- and quasi-two dimensional magneto-polaron spectrum and cyclotron resonance phenomenon in InSe
Authors:
D. E. N. Brancus* and G. Stan**
Affiliation:
* Faculty of Physics, University of Bucharest, PO Box Mg 11, 76900 Bucharest, Romania
* Lamar University, Colorado State, USA
E-mail
Keywords:
Abstract:
In the frame of “improved Wigner-Brillouin perturbation theory” the energy levels in the both considered cases of a conduction electron, that of a two dimensional bare electron and that of a quasi-two dimensional electron, interacting with the optical phonon field in an uniaxial anisotropic polar crystal, placed in a d.c. magnetic field directed along the optical axis are obtained. Consequently, the magnetic field dependence of the cyclotron resonance frequency is discussed. Though the electron-quasi-transverse phonon mode interaction is weak, these modes play an important role in both phenomena, that of magneto-polaron splitting and that of pinning as well. The features of the optical phonon spectrum in such anisotropic uniaxial polar crystals determine the appearance of a new magneto-polaron branches. Numerical results for the magneto-polaron spectrum and magnetic field dependence of cyclotron resonance frequency are presented in the case of InSe layered semiconductor.
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