Low-temperature thermal conductivity of superconductors with gap nodes |
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Authors: | Löfwander Tomas Fogelström Mikael |
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Affiliation: | Institut für Theoretische Festk?rperphysik, Universit?t Karlsruhe, Germany. |
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Abstract: | We report a detailed analytic and numerical study of electronic thermal conductivity in d-wave superconductors. We compare theory of the crossover at low temperatures from T dependence to T(3) dependence for increasing temperature with recent experiments on YBa(2)Cu(3)O(7) in zero magnetic field for T approximately [0.04 K,0.4 K] by Hill et al. [Phys. Rev. Lett. 92, 027001 (2004)]. Transport theory, including impurity scattering and inelastic scattering within strong-coupling superconductivity, can consistently fit the temperature dependence of the data in the lower half of the temperature regime. We discuss the conditions under which we expect power-law dependences over wide temperature intervals. |
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