Magnetic oscillations in planar systems with the Dirac-like spectrum of quasiparticle excitations II: transport properties

TL;DR

This paper investigates quantum magnetic oscillations in graphene, focusing on electrical and thermal conductivities, and suggests that electron thermal conductivity oscillations could be observed at low magnetic fields if electron and phonon contributions are properly separated.

Contribution

It provides a detailed analysis of magnetic oscillations in graphene's transport properties, emphasizing the importance of separating electron and phonon effects for observing oscillations.

Findings

Oscillations in electron thermal conductivity are observable at low magnetic fields.

Proper separation of electron and phonon contributions is crucial for detecting these oscillations.

The study highlights the potential to observe Lorenz number oscillations in graphene.

Abstract

The quantum magnetic oscillations of electrical (Shubnikov de Haas effect) and thermal conductivities are studied for graphene which represents a distinctive example of planar systems with a linear, Dirac-like spectrum of quasiparticle excitations. We show that if a utmost care was taken to separate electron and phonon contributions in the thermal conductivity, the oscillations of electron thermal conductivity, $\kappa(B)$ and the Lorenz number, $L(B)$ would be observable in the low field (less than a few Teslas) regime.