Optically Detected Magnetophonon Resonances in Polar Semiconductors

TL;DR

This paper investigates magnetophonon resonances in polar semiconductors, revealing how cyclotron resonance features depend on magnetic field and temperature, and providing a detailed theoretical analysis of the polaron effects.

Contribution

It introduces a comprehensive theoretical framework for analyzing magnetophonon resonances using the memory function technique, highlighting the exponential behavior of resonance amplitudes at low temperatures.

Findings

Resonances occur at specific ratios of cyclotron and LO phonon frequencies.

CR mass and linewidth are derived from magneto-optical absorption spectra.

Resonance amplitudes follow an exponential law at low temperatures.

Abstract

Magnetophonon resonances are found for $\omega_{c}=\omega_{LO}/N$ with N=1,2,3 .... in the polaron cyclotron resonance (CR) linewidth and effective mass of bulk polar semiconductors. The CR mass and the linewidth are obtained from the full polaron magneto-optical absorption spectrum which are calculated using the memory function technique. The amplitude of the resonant peak in the linewidth can be described by an exponential law at low temperature.