Abstract
The electronic contribution to the thermal conductivity of a d x 2−y 2-wave superconductor is calculated within a variational method. By considering the scattering of electrons by point defects and acoustic phonons, the behavior of the thermal conductivity of YBa2Cu3O7−δ and Bi2Sr2CaCu2O8 single crystals can be well described with realistic values of the physical parameters. Besides, the values obtained for the transport electron-phonon coupling constant λ tr lie in the same range of magnitude than those derived from electrical resistivity measurements. b]References
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