Magnetoresistivity Modulated Response in Bichromatic Microwave Irradiated Two Dimensional Electron Systems

TL;DR

This paper investigates how bichromatic microwave irradiation influences the magnetoresistivity in two-dimensional electron systems, revealing modulated oscillations due to superimposed microwave frequencies.

Contribution

It introduces a model analyzing the combined effect of two microwave frequencies on electron orbit dynamics and magnetoresistivity response in 2D systems.

Findings

Magnetoresistivity exhibits modulated pulses at the frequency difference of microwaves.

Main oscillations occur at the average of the two microwave frequencies.

Electron orbit centers are driven by superimposed harmonic oscillations.

Abstract

We analyze the effect of bichromatic microwave irradiation on the magnetoresistivity of a two dimensional electron system. We follow the model of microwave driven Larmor orbits in a regime where two different microwave lights with different frequencies are illuminating the sample ($w_{1}$ and $w_{2}$). Our calculated results demonstrate that now the electronic orbit centers are driven by the superposition of two harmonic oscillatory movements with the frequencies of the microwave sources. As a result the magnetoresisitivity response presents modulated pulses in the amplitude with a frequency of $\frac{w_{1}-w_{2}}{2}$, whereas the main response oscillates with $\frac{w_{1}+w_{2}}{2}$.