Resonance oscillations of magnetoresistance in double quantum wells

TL;DR

This paper investigates resonance-induced magnetoresistance oscillations in double quantum wells, demonstrating experimental and theoretical insights into their temperature dependence and gate-controlled modulation.

Contribution

It provides new understanding of the temperature effects on oscillations and shows how to control their properties via gating in double quantum wells.

Findings

Oscillations are suppressed with temperature due to quantum lifetime decay.

Gate voltage can modulate the period and amplitude of oscillations.

Thermal broadening of Fermi distribution is not the main cause of suppression.

Abstract

We present experimental and theoretical studies of the magnetoresistance oscillations induced by resonance transitions of electrons between tunnel-coupled states in double quantum wells. The suppression of these oscillations with increasing temperature is irrelevant to the thermal broadening of the Fermi distribution and reflects the temperature dependence of the quantum lifetime of electrons. The gate control of the period and amplitude of the oscillations is demonstrated.