Giant asymmetry of the longitudinal magnetoresistance in high-mobility two-dimensional electron gas on a cylindrical surface

TL;DR

This paper reports a significant asymmetry in magnetoresistance in high-mobility 2D electron gases on cylindrical surfaces, showing resistance vanishing at edges depending on magnetic field direction, explained via Landauer-Buettiker formalism.

Contribution

It demonstrates a giant asymmetry in magnetoresistance in curved 2D electron systems and provides a quantitative analysis using the Landauer-Buettiker approach.

Findings

Magnetoresistance asymmetry depends on magnetic field direction.

Resistance vanishes at specific edges based on field reversal.

Quantitative analysis aligns with experimental observations.

Abstract

A giant asymmetry in the magnetoresistance was revealed in high-mobility, two-dimensional electron gas on a cylindrical surface. The longitudinal resistance along the magnetic-field gradient impressed by the surface curvature was found to vanish if measured along one of the edges of the curved Hall bar. If the external magnetic field is reversed, then the longitudinal resistance vanishes at the opposite edge of the Hall bar. This asymmetry is analyzed quantitatively in terms of the Landauer-Buettiker formalism.