Nonmonotonic Temperature Dependence of the Thermal Hall Angle of a YBa$_{2}$Cu$_{3}$O$_{6.95}$ Single Crystal

We have performed high-resolution measurements of the magnetic field (0~T~ $\leq B \leq 9$ T) and temperature (10 K~ $\leq T < 140$ K) dependence of the longitudinal and transverse Hall thermal conductivity of a twinned YBa $_{2}$ Cu $_{3}$ O $_{6.95}$ single crystal. We have used and compared two recently published methods to extract the thermal Hall angle $θ_{H} (T, B)$ . Our results indicate that $\cot (θ_{H})$ varies quite accurately as $T^{4}$ in the intermediate temperature range $\sim 0.3 < T / T_{c}$ . It shows a well defined minimum at $T_{m} ≃ 20$ 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 $\sim 18~ $K$ \le T \le 30~$K.

Nonmonotonic Temperature Dependence of the Thermal Hall Angle of a YBa $_{2}$ Cu $_{3}$ O $_{6.95}$ Single Crystal

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Nonmonotonic Temperature Dependence of the Thermal Hall Angle of a YBa $_{2}$ Cu $_{3}$ O $_{6.95}$ Single Crystal

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Nonmonotonic Temperature Dependence of the Thermal Hall Angle of a YBa22​Cu33​O6.956.95​ Single Crystal

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Nonmonotonic Temperature Dependence of the Thermal Hall Angle of a YBa22​Cu33​O6.956.95​ Single Crystal

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Nonmonotonic Temperature Dependence of the Thermal Hall Angle of a YBa $_{2}$ Cu $_{3}$ O $_{6.95}$ Single Crystal

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Nonmonotonic Temperature Dependence of the Thermal Hall Angle of a YBa $_{2}$ Cu $_{3}$ O $_{6.95}$ Single Crystal

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