Raman scattering on phonon-plasmon coupled modes in magnetic fields

TL;DR

This paper presents a theoretical analysis of Raman scattering on phonon-plasmon coupled modes in high magnetic fields, exploring dielectric functions, resonances, and the influence of magnetic field strength and carrier concentration.

Contribution

It introduces a comprehensive theoretical model for Raman scattering in high magnetic fields, including dielectric function calculations and resonance analysis.

Findings

Raman scattering exhibits resonances at coupled mode frequencies and cyclotron frequency multiples.

The dielectric function was calculated considering electron damping and phonon lifetime.

Raman cross section varies with carrier concentration and magnetic field strength.

Abstract

Raman scattering on phonon--plasmon coupled modes in high magnetic fields is considered theoretically. The calculations of the dielectric function were performed in the long-wave approximation for the semiclassical and ultra-quantum magnetic fields taking into account the electron damping and intrinsic lifetime of optical phonons. The Raman scattering has resonances at the frequencies of coupled modes as well as at multiples of the cyclotron frequency. The dependence of the Raman cross section on the carrier concentration is analyzed.