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

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 $(\Gamma /\Delta {)}^2$, 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.

8 pages +1 ps figure included in text, to appear in Phys. Rev. B

References in corpus (1)

• Highly Anisotropic Gap Function in Borocarbide Superconductor LuNi_2B_2C

Cited by in corpus (6)

• Heat Conduction in the Vortex State of NbSe_2: Evidence for Multi-Band Superconductivity
• Negative thermal magnetoresistivity as a signature of chiral anomaly in Weyl superconductors
• Single-electron transport through the vortex core levels in clean superconductors
• Thermal conductivity in a mixed state of a superconductor at low magnetic fields
• Quasi-Classical Calculation of the Mixed-State Thermal Conductivity in s-Wave and d-Wave Superconductors
• Low-Temperature Specific Heat of an Extreme-Type-II Superconductor at High Magnetic Fields