A consistent interpretation of the low temperature magneto-transport in graphite using the Slonczewski--Weiss--McClure 3D band structure calculations

TL;DR

This study measures magnetotransport in graphite at millikelvin temperatures, showing quantum oscillations consistent with the Slonczewski--Weiss--McClure model and finding no evidence for Dirac fermions in the data.

Contribution

It provides a consistent interpretation of low-temperature magneto-transport in graphite using 3D band structure calculations, clarifying the nature of charge carriers.

Findings

Quantum oscillations observed up to N≈90 for both electrons and holes.

Data aligns well with the Slonczewski--Weiss--McClure model for massive fermions.

No evidence of Dirac fermions in the transport measurements.

Abstract

Magnetotransport of natural graphite and highly oriented pyrolytic graphite (HOPG) has been measured at mK temperatures. Quantum oscillations for both electron and hole carriers are observed with orbital angular momentum quantum number up to $N\approx90$. A remarkable agreement is obtained when comparing the data and the predictions of the Slonczewski--Weiss--McClure tight binding model for massive fermions. No evidence for Dirac fermions is observed in the transport data which is dominated by the crossing of the Landau bands at the Fermi level, corresponding to $dE/dk_z=0$, which occurs away from the $H$ point where Dirac fermions are expected.