Thermal conductivity near Hc2 for spin-triplet superconducting states with line nodes in Sr2RuO4
L. Tewordt, D. Fay
DOI 10.1103/PhysRevB.64.024528 · Physical Review B
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Abstract
We calculate the thermal conductivity κ in magnetic fields near Hc2 for spin-triplet superconducting states with line nodes vertical and horizontal relative to the RuO2 planes. The method for calculating the Green’s functions takes into account the spatial variation of the order parameter and superconducting flow for the Abrikosov vortex lattice. For in-plane magnetic field we obtain variations of the in-plane κ with twofold symmetry as a function of rotation angle where the minima and maxima occur for field directions parallel and perpendicular to the heat flow. The amplitude of the variation decreases with increasing impurity scattering and temperature. At higher temperatures the minima and maxima of the variation are interchanged. Since the results for vertical and horizontal line nodes are almost the same we cannot say which of the two pairing models is more compatible with recent measurements of κ in Sr2RuO4. The observed fourfold modulation of κ in YBa2Cu3O7−δ is obtained for d-wave pairing by taking into account the particular shape of the Fermi surface and the finite temperature effect. The results for κ for the f-wave pairing state with horizontal line nodes disagree in some respects with the measurements on UPt3.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Sr2RuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| UPt3 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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