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Thermal conductivity in the vortex state of YBa_2Cu_3O_7 and Sr_2RuO_4

L. Tewordt·D. Fay
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Abstract

The thermal conductivity $κ$ is calculated for the Abrikosov vortex lattice with d-wave pairing. The Andreev scattering rate arises from the self energy term in Gorkov's integral equation for the corresponding Green's function. The impurity scattering rate is calculated self-consistently from this Green's function in the t-matrix approximation. Neither point-like impurity scattering with a phase shift in the almost unitary limit nor in the Born limit can consistently explain recent zero-field and finite-field measurements of $κ/T$ at low $T$ in ultraclean YBCO. Our theory also applies to the spin triplet pairing states with vertical or horizontal line nodes in Sr$_2$RuO$_4$

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L. Tewordt, D. Fay. 2004-02-23. Thermal conductivity in the vortex state of YBa_2Cu_3O_7 and Sr_2RuO_4. https://arxiv.org/abs/cond-mat/0401214

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