Magnetic Field Induced Gap and Kink Behavior of Thermal Conductivity

Abstract

The thermal conductivity of a quasiparticle (QP) system described by a relativistic four-fermion interaction model in the presence of an external magnetic field is calculated. It is shown that, for narrow width of quasiparticles, the thermal conductivity, as a function of the applied magnetic field, exhibits a kink behavior at a critical field $B_c\sim T^2$. The kink is due to the opening of a gap in the QP spectrum at a critical magnetic field $B_c$ and to the enhancement of the transitions between the zeroth and first Landau levels. Possible applications of the results are discussed.

4 pages,1 figure

References in corpus (1)

• Magnetic field-induced insulating behavior in highly oriented pyrolitic graphite

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