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Quasiparticle Thermal Conductivities in a Type-II Superconductor at High Magnetic Field

S. Dukan·T. P. Powell·Z. Tesanovic
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Abstract

We present a calculation of the quasiparticle contribution to the longitudinal thermal conductivities as well as transverse (Hall) thermal conductivity of an extreme type-II superconductor in a high magnetic field and at low temperatures. In the limit of frequency and temperature approaching zero, both longitudinal and transverse conductivities upon entering the superconducting state undergo a reduction from their respective normal state values by the factor $(Γ/Δ)^2$, which measures the size of the region at the Fermi surface containing gapless quasiparticle excitations. We use our theory to numerically compute the longitudinal transport coefficient in borocarbide and A-15 superconductors. The agreement with recent experimental data on LuNi_2B_2C is very good.

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S. Dukan, T. P. Powell, Z. Tesanovic. 2002-04-18. Quasiparticle Thermal Conductivities in a Type-II Superconductor at High Magnetic Field. https://doi.org/10.1103/physrevb.66.014517

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