Magnetic oscillations in planar systems with the Dirac-like spectrum of quasiparticle excitations

Abstract

The quantum magnetic oscillations are studied for planar condensed-matter systems with a linear, Dirac-like spectrum of quasiparticle excitations. We derive analytical expressions for magnetic oscillations (de Haas--van Alphen effect) in the density of states, thermodynamic potential, magnetization, and chemical potential both for zero and finite temperatures, and in the presence of scattering from impurities. We discuss also a possibility of using magnetic oscillations for detection of a gap that may open in the spectrum of quasiparticle excitations due to a nontrivial interaction between them.