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 Bc T2. The kink is due to the opening of a gap in the QP spectrum at a critical magnetic field Bc and to the enhancement of the transitions between the zeroth and first Landau levels. Possible applications of the results are discussed.
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