Nonmonotonic Temperature Dependence of the Thermal Hall Angle of a YBa2Cu3O6.95 Single Crystal |
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Authors: | R Ocaña A Taldenkov P Esquinazi Y Kopelevich |
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Affiliation: | (1) Department of Superconductivity and Magnetism, Institut für Experimentelle Physik II, Universität Leipzig, Linnéstr. 5, D-04103 Leipzig, Germany |
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Abstract: | We have performed high-resolution measurements of the magnetic field (0 T B 9 T) and temperature (10 K T<140 K) dependence of the longitudinal and transverse Hall thermal conductivity of a twinned YBa2Cu3O6.95 single crystal. We have used and compared two recently published methods to extract the thermal Hall angle H(T, B). Our results indicate that cot( H) varies quite accurately as T4 in the intermediate temperature range 0.3c. It shows a well defined minimum at Tm 20 K which resembles that observed in the c-axis microwave conductivity. The electronic part of the longitudinal and the transverse thermal conductivity show the scaling behavior for transport properties predicted for d-wave superconductors in the temperature range 18 K T 30 K. |
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