New type of $B$-periodic magneto-oscillations in a two-dimensional electron system induced by microwave irradiation

TL;DR

This paper reports a novel type of microwave-induced, $B$-periodic magneto-oscillations in a 2D electron system, linked to edge magnetoplasmon excitations, with potential applications in tunable microwave and terahertz detection.

Contribution

It introduces a new magneto-oscillation phenomenon in 2D electron systems caused by microwave irradiation, expanding understanding of edge magnetoplasmon dynamics.

Findings

Oscillations are periodic in magnetic field and depend on microwave frequency.

The phenomenon involves coherent excitation of edge magnetoplasmons.

Potential for new microwave and terahertz detection techniques.

Abstract

We observe a new type of magneto-oscillations in the photovoltage and the longitudinal resistance of a two-dimensional electron system. The oscillations are induced by microwave irradiation and are periodic in magnetic field. The period is determined by the microwave frequency, the electron density, and the distance between potential probes. The phenomenon is accounted for by coherent excitation of edge magnetoplasmons in the regions near the contacts and offers perspectives for the development of new tunable microwave and terahertz detection schemes and spectroscopic techniques.