Thermal Hall Conductivity in a Multiband Chiral p-Wave Superconductor

Abstract

For the spin-triplet superconductor Sr2RuO4, multiband effects on the thermal Hall conductivity are investigated in the superconducting phase. While the gap functions of all bands (α–β and γ) are assumed to have chiral p-wave symmetry, the thermal Hall conductivity at very low temperatures is dominated by the γ band due to its topological nontrivial state and the presence of nodeless quasiparticle excitation gaps.