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Influence of temperature on the nodal properties of the longitudinal thermal conductivity of YBa\(\mathsf{_2}\)Cu\(\mathsf{_3}\)O\(\mathsf{_{7-x}}\)

  • R. Ocaña
  • P. EsquinaziEmail author
Original Paper

Abstract.

The angle dependence at different temperatures of the longitudinal thermal conductivity \(\kappa_{xx}(\theta)\) in the presence of a planar magnetic field is presented. In order to study the influence of the gap symmetry on the thermal transport, angular scans were measured up to a few Kelvin below the critical temperature Tc. We found that the four-fold oscillation of \(\kappa_{xx}(\theta)\) vanishes at T > 20K and transforms into a one-fold oscillation with maximum conductivity for a field of 8 T applied parallel to the heat current. Nevertheless, the results indicate that the d-wave pairing symmetry remains the main pairing symmetry of the order parameter up to Tc. Numerical results of the thermal conductivity using an Andreev reflection model for the scattering of quasiparticles by supercurrents under the assumption of d-wave symmetry provide a semiquantitative description of the overall results.

Keywords

Magnetic Field Thermal Conductivity Critical Temperature Thermal Transport Maximum Conductivity 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin/Heidelberg 2003

Authors and Affiliations

  1. 1.Abteilung Supraleitung und Magnetismus, Institut für Experimentelle Physik IIUniversität LeipzigLeipzigGermany

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