High order fractional microwave induced resistance oscillations in 2D systems

TL;DR

This paper reports the observation of fractional microwave-induced resistance oscillations in 2D electron systems, exploring their dependencies and comparing with existing theories, revealing new insights into high-order fractional effects.

Contribution

It presents the first experimental observation of high-order fractional microwave-induced resistance oscillations up to m=8 in 2D systems, expanding understanding of these phenomena.

Findings

Fractional oscillations observed up to m=8

Oscillations quenched at high microwave frequencies

Temperature, power, and frequency dependencies analyzed

Abstract

We report on the observation of microwave-induced resistance oscillations associated with the fractional ratio n/m of the microwave irradiation frequency to the cyclotron frequency for m up to 8 in a two-dimensional electron system with high electron density. The features are quenched at high microwave frequencies independent of the fractional order m. We analyze temperature, power, and frequency dependencies of the magnetoresistance oscillations and discuss them in connection with existing theories.