Magnetic Miniband Structure and Quantum Oscillations in Lateral Semiconductor Superlattices

TL;DR

This paper provides a quantum-mechanical analysis of magnetotransport in lateral semiconductor superlattices, revealing novel quantum oscillations in magnetoresistance due to magnetic miniband structures, and predicts new oscillations yet to be observed experimentally.

Contribution

It introduces a non-perturbative quantum approach to analyze magnetotransport, explaining recent experimental oscillations and predicting new phenomena in superlattice systems.

Findings

Reproduces experimentally observed quantum oscillations in magnetoresistance.

Predicts opposite-phase oscillations in perpendicular magnetoresistance.

Links oscillations to magnetic miniband structures in overlapping regimes.

Abstract

We present fully quantum-mechanical magnetotransport calculations for short-period lateral superlattices with one-dimensional electrostatic modulation. A non-perturbative treatment of both magnetic field and modulation potential proves to be necessary to reproduce novel quantum oscillations in the magnetoresistance found in recent experiments in the resistance component parallel to the modulation potential. In addition, we predict oscillations of opposite phase in the component perpendicular to the modulation not yet observed experimentally. We show that the new oscillations originate from the magnetic miniband structure in the regime of overlapping minibands.