Theory of Thermal Conductivity in YBa_2Cu_3O_{7-δ}

Abstract

We calculate the electronic thermal conductivity in a d-wave superconductor, including both the effect of impurity scattering and inelastic scattering by antiferromagnetic spin fluctuations. We analyze existing experiments, particularly with regard to the question of the relative importance of electronic and phononic contributions to the heat current, and to the influence of disorder on low-temperature properties. We find that phonons dominate heat transport near T_c, but that electrons are responsible for most of the peak observed in clean samples, in agreement with a recent analysis of Krishana et al. In agreement with recent data on YBa_2(Cu_1-xZn_x)_3O_7-δthe peak position is found to vary nonmonotonically with disorder.

4 pages, 4 figures, to be published in Phys. Rev. Lett

References in corpus (1)

• Heat Transport and the Nature of the Order Parameter in Superconducting $UP{t}_3$

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