Magnetoplasmon resonance in 2D electron system driven into a zero-resistance state

TL;DR

This paper investigates a strong magnetoplasmon resonance in a high mobility 2D electron system under microwave radiation, revealing insights into zero-resistance states and negative resistance phenomena.

Contribution

It provides experimental evidence linking magnetoplasmon resonance to zero-resistance states and negative resistance in a high mobility quantum well system.

Findings

Observation of a sharp photoresistance peak from magnetoplasmon resonance

Evidence of negative background resistance related to zero-resistance states

Robustness of the magnetoplasmon resonance peak under applied dc fields

Abstract

We report on a remarkably strong, and a rather sharp, photoresistance peak originating from a dimensional magnetoplasmon resonance (MPR) in a high mobility GaAs/AlGaAs quantum well driven by microwave radiation into a zero-resistance state (ZRS). The analysis of the MPR signalreveals a negative background providing experimental evidence for the concept of absolute negative resistance associated with the ZRS. When a system is further subject to a dc field, the maxima of microwave-induced resistance oscillations decay away and a system reveals a state with close-to-zero differential resistance. The MPR peak, on the other hand, remains essentially unchanged, indicating surprisingly robust Ohmic behavior under the MPR conditions.