Cyclotron Resonance of an Interacting Polaron Gas in a Quantum Well. Magneto-Plasmon-Phonon Mixing

TL;DR

This paper theoretically investigates the cyclotron-resonance spectra of an interacting polaron gas in a quantum well, considering magneto-plasmon-phonon mixing and band nonparabolicity, and confirms the resonance near the GaAs TO-phonon frequency.

Contribution

It introduces a comprehensive theoretical model that includes magneto-plasmon-phonon mixing and band nonparabolicity to analyze CR spectra in quantum wells.

Findings

Resonant magneto-polaron coupling occurs near GaAs TO-phonon frequency.

Calculated spectra agree with recent experimental data.

The contribution of different magneto-plasmon-phonon modes varies with electron density.

Abstract

Cyclotron-resonance (CR) spectra of a gas of interacting polarons confined in a GaAs/AlAs quantum well are theoretically investigated taking into account the magneto-plasmon-phonon mixing and band nonparabolicity. Contributions of different magneto-plasmon-phonon modes to the total magneto-polaron coupling strength are investigated as a function of the electron density. It is confirmed theoretically, that the resonant magneto-polaron coupling in a high-density GaAs/AlAs quantum well occurs near the GaAs TO-phonon frequency rather than near the GaAs LO-phonon frequency. Calculated CR spectra are in agreement with recent experimental data.