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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 2:29 |
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Conference: Bucharest University Faculty of Physics 2004 Meeting
Section: Solid State Physics and Materials Science
Title:
Optical Phonon-Plasmon Coupled Modes in Doped Anisotropic Uniaxial Semiconductors
Authors:
D.E.Brancus and A. Husanu
Affiliation:
Faculty of Physics, University of Bucharest, Bucharest, Romania
E-mail
Keywords:
optical phonon-plasmon coupling, uniaxial semiconductor
Abstract:
The Hamiltonian of a uniaxial anisotropic doped semiconductor, containing a free electron gas interacting with the optical phonon modes via their associated macroscopic field, is obtained. In the context of the random phase approximation, the linear response of the system to the scalar potential is investigated. The linear response function is calculated by taking into account all sources of the system anisotropy (the shape of the constant energy-surfaces of the ?bare? electron, the Coulomb electron-electron interaction, the frequency spectrum of the extraordinary phonon modes and the electron-optical phonon interaction). The dispersion of the obtained coupled mode-frequencies is discussed for the particular case of wurtzite GaN.
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