On Anisotropic Transport in High Landau Levels

TL;DR

This paper discusses anisotropic transport phenomena in high Landau levels within the quantum Hall regime, highlighting the orientation of low conductance directions and quantifying bulk conductance at resistance peaks.

Contribution

It clarifies the relationship between edge-bulk transport models and experimental observations of anisotropic conductance in high Landau levels.

Findings

Low bulk conductance direction is perpendicular to naive expectations.

Experimental high resistance peaks correspond to bulk conductance of approximately 1 e^2/h.

Provides insight into anisotropic transport behavior in quantum Hall systems.

Abstract

We would like to point out that: (i) according to the edge-bulk transport models for the quantum Hall regime, the direction of low bulk conductance is actually perpendicular to that expected naively; and (ii) the values of experimental "high resistance" peaks correspond to value of bulk conductance $\approx 1 e^{2}/h$.