Nonlinear magnetoresistance of an irradiated two-dimensional electron system

TL;DR

This paper analyzes the nonlinear magnetoresistance in a microwave-irradiated high mobility two-dimensional electron system under direct current, using a photon-assisted transition model, aligning well with recent experimental results.

Contribution

It introduces a dc-controlled theoretical scheme to explain nonlinear magnetotransport phenomena in irradiated 2D electron systems, matching experimental observations.

Findings

Predicted oscillatory resistance features match experiments

Identified extrema and nodes in differential resistance

Validated photon-assisted transition as key mechanism

Abstract

Nonlinear magnetotransport of a microwave-irradiated high mobility two-dimensional electron system under a finite direct current excitation is analyzed using a dc-controlled scheme with photon-assisted transition mechanism. The predicted amplitudes, extrema and nodes of the oscillatory differential resistance versus the magnetic field and the current density, are in excellent agreement with the recent experimental observation [Hatke et al. Phys. Rev. B 77, 201304(R) (2008)].