Effect of frequency and temperature on microwave-induced magnetoresistance oscillations in two-dimensional electron systems

TL;DR

This paper investigates how microwave frequency and temperature influence magnetoresistance oscillations in two-dimensional electron systems, demonstrating that increased frequency or temperature dampens these oscillations through enhanced lattice interactions.

Contribution

The study provides a unified theoretical explanation for the temperature and frequency dependence of microwave-induced magnetoresistance oscillations.

Findings

Oscillations diminish with higher frequency and temperature.

Damping is caused by increased lattice interactions.

Theoretical model matches experimental behavior.

Abstract

Experimental results on microwave-induced magnetoresistance oscillation in two-dimensional electron systems show a similar behavior of these systems regarding temperature and microwave frequency. It is found that these oscillations tend to quench when frequency or temperature increase, approaching magnetoresistance to the response of the dark system. In this work we show that this experimental behavior can be addressed on the same theoretical basis. Microwave radiation forces the electron orbits to move back and forth being damped by interaction with the lattice. We show that this damping depends dramatically on microwave frequency and also on temperature. An increase in frequency or temperature gives rise to an increase in the lattice damping producing eventually a quenching effect in the magnetoresistance oscillations.