Microwave modulation of electron temperature and Shubnikov-de Haas oscillation in two-dimensional electron systems

TL;DR

This paper investigates how microwave radiation heats electrons in two-dimensional systems, modulating Shubnikov-de Haas oscillations and magnetoresistance, aligning theoretical models with experimental observations.

Contribution

It introduces a realistic electron heating model that explains microwave-induced modulation of oscillations and resistance suppression in 2D electron systems.

Findings

Electron temperature exhibits resonance under microwave irradiation.

Microwave-induced resistance oscillations are confirmed.

Modulation of Shubnikov-de Haas oscillations aligns with experimental data.

Abstract

Recently discovered modulations of Shubnikov-de Haas oscillations in microwave-irradiated two-dimensional electron systems are shown to arise from electron heating induced by the radiation. The electron temperature, obtained by balancing the energy absorption from the microwave field and the energy dissipation to the lattice through realistic electron-phonon couplings, exhibits resonance. The modulation of the Shubnikov de Haas oscillation and the suppression of magnetoresistance are demonstrated together with microwave-induced resistance oscillation, in agreement with experimental findings.