Driving Weiss oscillations to Zero Resistance States by Microwave Radiation

TL;DR

This paper presents a theoretical model showing how microwave radiation can modulate Weiss oscillations, potentially leading to zero resistance states, and how these states can be controlled or destroyed by tuning system parameters.

Contribution

The study introduces a novel interference-based model explaining how microwave radiation influences Weiss oscillations and zero resistance states in 2D electron systems.

Findings

Weiss oscillations can reach zero resistance states under specific microwave conditions.

The magnetoresistance is mainly affected by the spatial period and radiation frequency.

Periodic potential can destroy radiation-induced zero resistance states.

Abstract

In this work we present a theoretical model to study the effect of microwave radiation on Weiss oscillations. In our proposal Weiss oscillations, produced by an spatial periodic potential, are modulated by microwave radiation due to an interference effect between both, space and time-dependent, potentials. The final magnetoresistance depends mainly on the spatial period of the spatial potential and the frequency of radiation. Depending on the values of these parameters, we predict that Weiss oscillations can reach zero resistance states. On the other hand, these dissipationless transport states, created just by radiation, can be destroyed by the additional presence of a periodic space-dependent potential. Then by tuning the spatial period or the radiation frequency, the magnetoresistance can be strongly modified.