Shubnikov-de Haas oscillations in two-dimensional electron gas under subterahertz radiation

TL;DR

This study investigates how subterahertz radiation influences Shubnikov-de Haas oscillations in a 2D electron gas, revealing complex modifications that challenge existing theories of microwave photoresistance.

Contribution

It uncovers a novel oscillatory correction to SdHO amplitude caused by subterahertz radiation, linking it to microwave-induced resistance oscillations.

Findings

SdHO amplitude is non-trivially modified by radiation

Oscillatory correction shares the same period and phase as MIRO

Challenges current understanding of microwave photoresistance

Abstract

We report on magnetotransport measurements in a two-dimensional (2D) electron gas subject to subterahertz radiation in the regime where Shubnikov-de Haas oscillations (SdHO) and microwave-induced resistance oscillations (MIRO) coexist over a wide magnetic field range, spanning several harmonics of the cyclotron resonance. Surprisingly, we find that the SdHO amplitude is modified by the radiation in a non-trivial way owing to the oscillatory correction which has the same period and phase as MIRO. This finding challenges our current understanding of microwave photoresistance in 2D electron gas, calling for future investigations.