Role of electron-electron interactions in nonlinear transport in 2D electron systems

TL;DR

This paper investigates how electron-electron interactions influence the temperature-dependent decay of nonlinear magnetoresistance oscillations in high-mobility 2D electron systems under strong electric fields.

Contribution

It provides experimental evidence linking electron-electron interactions to the decay of oscillations, highlighting the role of quantum scattering rates in nonlinear transport.

Findings

Decay of oscillation amplitude increases with temperature due to quantum scattering.

Electron-electron interactions significantly affect nonlinear magnetoresistance.

Quantum scattering rate is a key factor in oscillation decay.

Abstract

We study the temperature evolution of the non-linear oscillatory magnetoresistance in a high-mobility two-dimensional electron system subject to a strong dc electric field. We find that the decay of the oscillation amplitude with increasing temperature originates primarily from increasing quantum scattering rate entering the Dingle factor. We attribute this behavior to electron-electron interaction effects.