Magnetophonon resonance in quantum wells in tilted field. What is concealed behind its angular dependence?

TL;DR

This paper investigates magnetophonon resonance in quantum wells under tilted magnetic fields, revealing that its angular dependence is highly sensitive to variations in carrier concentration influenced by magnetic field strength.

Contribution

It uncovers the hidden dependence of MPR angular behavior on carrier concentration changes induced by magnetic field variations.

Findings

MPR amplitude depends strongly on carrier concentration n.

Angular dependence of MPR is linked to magnetic field-induced n variation.

Experimental data supports the sensitivity of MPR to carrier density fluctuations.

Abstract

Magnetophonon resonance in quantum wells in a tilted magnetic field B is investigated. Measurements of the Hall coefficient and correspondingly of the carrier concentration as a functions of magnetic field and temperature are simultaneously performed. It is shown that the experimental data can be interpreted in terms of a great sensitivity of the effect to the variation of the two dimensional carrier concentration n in a certain concentration interval. In other words, the observed angular dependence of the MPR amplitudes is a manifestation of dependence of n on the magnitude of the magnetic field B.