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Apparent T2 dependence of the normal-state resistivities and lattice heat capacities of high-Tc superconductors

  • Author(s): Webb, GW
  • Fisk, Z
  • Engelhardt, JJ
  • Bader, SD
  • et al.

We report new measurements of the normal-state electrical resistances of several high-Tc (∼ 20 K) A-15 structure superconductors. It is found that the resistances are linear functions of T2 from Tc to 40 K. Analysis of available lattice heat-capacity data on the same materials shows that it also varies as T2 over the same temperature interval. These observations suggest that the T2 resistivity is due to electron-phonon scattering. This interpretation is supported by the results of a model calculation for the temperature dependence of the resistivity and the lattice-heat capacity of Nb3Sn. © 1977 The American Physical Society.

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