Integer Quantum Hall Effect in Graphite

TL;DR

This paper reports the observation of the integer quantum Hall effect in highly oriented pyrolytic graphite through Hall effect measurements, revealing quantized conductance plateaus and supporting a theoretical model for disordered semiconductors.

Contribution

It provides experimental evidence of the integer quantum Hall effect in graphite and links it to the Hall effect governing its magnetoresistance behavior.

Findings

Observation of quantized Hall plateaus in graphite

Support for the Hall effect's role in magnetoresistance

Confirmation of theoretical models for disordered semiconductors

Abstract

We present Hall effect measurements on highly oriented pyrolytic graphite that indicate the occurrence of the integer quantum-Hall-effect. The evidence is given by the observation of regular plateau-like structures in the field dependence of the transverse conductivity obtained in van der Pauw configuration. Measurements with the Corbino-disk configuration support this result and indicate that the quasi-linear and non-saturating longitudinal magnetoresistance in graphite is governed by the Hall effect in agreement with a recent theoretical model for disordered semiconductors.