Novel A-B type oscillations in a 2-D electron gas in inhomogenous magnetic fields

TL;DR

This paper predicts novel Aharonov-Bohm type oscillations in the resistivity of a high mobility 2D electron gas caused by quantum flux tube resonances, which could be observed experimentally.

Contribution

It introduces a new quantum and semiclassical analysis revealing unique oscillations in resistivity due to flux tube resonances in 2D electron gases.

Findings

Identification of Aharonov-Bohm type oscillations in resistivity.

Resonance condition ${(k_fR)}^2=4F(n+1/2)$ for flux tube effects.

Discussion of experimental conditions for observing these oscillations.

Abstract

We present results from a quantum and semiclassical theoretical study of the $\rho_{xy}$ and $\rho_{xx}$ resistivities of a high mobility 2-D electron gas in the presence of a dilute random distribution of tubes with magnetic flux $\Phi$ and radius $R$, for arbitrary values of $k_f R$ and $F=e\Phi/h$. We report on novel Aharonov-Bohm type oscillations in $\rho_{xy}$ and $\rho_{xx}$, related to degenerate quantum flux tube resonances, that satisfy the selection rule ${(k_fR)}^2=4F(n+{1\over 2})$, with $n$ an integer. We discuss possible experimental conditions where these oscillations may be observed.