Theory of magnetophonon resonance in 2D electron gas in tilted magnetic field
V. V. Afonin, V. L. Gurevich, R. Laiho
Abstract
A theory of magnetophonon resonance in quantum wells in a magnetic field tilted to the perpendicular to 2DEG is developed. The resonance is due to the resonant interaction of 2D conduction electrons with the longitudinal optic phonons. The electrons are assumed to be nondegenerate. The angular dependence of the resonant maxima is investigated. The sharpness of the angular dependence, as well as the existence of double resonances, i.e. two resonant peaks for each resonance number is explained. A relation between the electron concentration dependence of the resonance amplitude in the perpendicular magnetic field and the angular dependence in the tilted field is analyzed. Investigation of the angular dependence can give information concerning the electron spectra, optic phonon and electron damping and the electron-phonon interaction in quantum wells.
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