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Separation of Quasiparticle and Phononic Heat Currents in YBCO

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

Measurements of the transverse (k_{xy}) and longitudinal (k_{xx}) thermal conductivity in high magnetic fields are used to separate the quasiparticle thermal conductivity (k_{xx}^{el}) of the CuO_2-planes from the phononic thermal conductivity in YBa_2Cu_3O_{7-δ}. k_{xx}^{el} is found to display a pronounced maximum below T_c. Our data analysis reveals distinct transport (τ) and Hall (τ_H) relaxation times below T_c: Whereas τis strongly enhanced, τ_H follows the same temperature dependence as above T_c.

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B. Zeini, A. Freimuth, B. Büchner, R. Gross, A. P. Kampf, M. Kläser, G. Müller-Vogt. 1999-03-08. Separation of Quasiparticle and Phononic Heat Currents in YBCO. https://doi.org/10.1103/physrevlett.82.2175

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