Oscillatory photoresistance on the high field side of the cyclotron resonance

TL;DR

This paper predicts a new class of magneto-resistance oscillations, RIROs, induced by high-power radiation in high Landau levels, with unique properties distinct from known microwave-induced oscillations.

Contribution

The study introduces radiowave-induced resistance oscillations (RIROs), characterized by power-independent amplitude and a period controlled by the electric field, expanding understanding of photoresistance phenomena.

Findings

RIROs are a new class of oscillations in high Landau levels.

Their amplitude is independent of radiation power.

The oscillation period depends on the electric field, not frequency.

Abstract

We consider the displacement contribution to photoresistance in overlapping Landau levels at radiation frequencies much smaller than the cyclotron frequency. We show that in the limit of short-range disorder and high radiation power, this contribution leads to a new class of magneto-resistance oscillations. These oscillations, which we call radiowave-induced resistance oscillations (RIROs), are distinct from the well known microwave-induced resistance oscillations in the following aspects: (i) their amplitude is independent of power, (ii) their period is controlled by the radiation electric field, rather than by the radiation frequency, and (iii) they can be either $1/B$ or $1/B^2$-periodic, depending on $B$, with the crossover point linked to the width of the cyclotron resonance absorption curve. We also show that RIROs should be readily observed in experiments.