Quasiparticle thermal conductivities in a type-II superconductor at high magnetic fields
Saša Dukan, T. Paul Powell, Zlatko Tešanović
DOI 10.1103/PhysRevB.66.014517 · Physical Review B
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Abstract
We present a calculation of the quasiparticle contribution to the longitudinal thermal conductivities κxx(H,T) (perpendicular to the external field) and κzz(H,T) (parallel to the external field) as well as the transverse (Hall) thermal conductivity κxy(H,T) of an extreme type-II superconductor in a high magnetic field (Hc1≪H<Hc2) and at low temperatures. In the limit of frequency and temperature approaching zero (Ω→0,T→0), 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 LuNi2B2C is very good.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| LuNi2B2C Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| V3Si Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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