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 utmost care is taken to separate electron and phonon contributions in the thermal conductivity, the oscillations of electron thermal conductivity $\kappa \left(B\right)$ and Lorenz number, $L\left(B\right)$ would be observable in the low-field (less than a few teslas) regime.

• Received 3 December 2004

DOI:https://doi.org/10.1103/PhysRevB.71.125124