Resonance Magnetoresistance in Coupled Quantum Wells

TL;DR

This paper develops a microscopic theory and experimental validation of how in-plane magnetic fields suppress resonance magnetoresistance in coupled quantum wells, revealing insights into electron scattering mechanisms.

Contribution

It introduces a new theoretical framework and experimental approach to analyze the suppression of resonance magnetoresistance by in-plane magnetic fields in quantum wells.

Findings

Suppression of resistance resonance depends on current and magnetic field orientation.

Characteristic field for suppression varies with scattering rates and temperature.

Method provides a new way to measure electron-electron scattering rates.

Abstract

The in-plane magnetic field suppresses the quantum coupling between electrons in a double quantum well structure. The microscopical theory of this effect is developed and confirmed experimentally. We have shown that the decrease of the "resistance resonance" peak is sensitive to the mutual orientation of the current and the in-plane magnetic field. The characteristic field required for the suppression of the resonance depends on the elastic small angle and electron--electron scattering rates. The study of the characteristic field allows to verify the temperature and Fermi energy dependence of the electron--electron scattering rate, providing a new experimental tool for its measurement.