Righi-Leduc effect in Y- and Bi-based high-Tc superconductors

B. Zeini, A. Freimuth, B. Büchner, R. Gross, A. P. Kampf, M. Kläser, G. Müller-Vogt

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4 Scopus citations


Measurements of the transverse (kxy) and longitudinal (kxx) thermal conductivity in the superconducting state of single crystals of YBa2Cu3O7-δ (YBCO) and Bi2Sr2CaCu2O8-δ (BSCCO) are presented in applied magnetic fields up to 14 T. We separate the electronic thermal conductivity (kxxel) of the CuO2-planes from the phononic thermal conductivity (kxxph) using kxy and the magnetic field dependence of kxx. Our main results are: (1) In YBCO kxxel(T) shows a pronounced maximum. We attribute this to a rapid increase of the quasiparticle scattering time τ below Tc. The maximum of kxxel(T) in BSCCO is much smaller due to stronger impurity scattering. The maximum of kxx is strongly suppressed by a magnetic field, presumably because of scattering of QPs on vortices. (2) Our data analysis reveals that below Tc a transport (τ) and Hall (τH) relaxation time must be distinguished as in the normal state. Whereas τ is strongly enhanced below Tc, τH displays the same temperature dependence as above Tc.

Original languageEnglish
Pages (from-to)325-332
Number of pages8
JournalPhysica C: Superconductivity and its Applications
StatePublished - May 1999
Externally publishedYes
EventProceedings of the 1998 1st Euroconference on Anomalous Complex Superconductors - Crete, Greece
Duration: 26 Sep 19983 Oct 1998


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