Temperature Dependence of Microwave Photoresistance in 2D Electron Systems

TL;DR

This study investigates how microwave-induced resistance oscillations in high-mobility 2D electron systems diminish with temperature, revealing an exponential decay linked to electron-electron interactions affecting the single particle lifetime.

Contribution

It demonstrates that the temperature dependence of microwave photoresistance is primarily due to electron-electron interactions modifying the single particle lifetime in 2D electron systems.

Findings

Oscillation amplitude decays exponentially with temperature

Decay rate scales with inverse magnetic field

Electron-electron interactions influence resistance oscillations

Abstract

We report on the temperature dependence of microwave-induced resistance oscillations in high-mobility two-dimensional electron systems. We find that the oscillation amplitude decays exponentially with increasing temperature, as $\exp(-\alpha T^2)$, where $\alpha$ scales with the inverse magnetic field. This observation indicates that the temperature dependence originates primarily from the modification of the single particle lifetime, which we attribute to electron-electron interaction effects.