Temperature- and magnetic-field-dependent thermal conductivity of pure and Zn-doped Bi_{2}Sr_{2}CaCu_{2}O_{8+δ} single crystals

Details Temperature- and magnetic-field-dependent thermal conductivity of pure and Zn-doped Bi_{2}Sr_{2}CaCu_{2}O_{8+δ} single crystals Temperature- and magnetic-field-dependent thermal conductivity of pure and Zn-doped Bi_{2}Sr_{2}CaCu_{2}O_{8+δ} single crystals

1998-12-16

arxiv.org/abs/cond-mat/9812265v3

Phys. Rev. B 62, 626-630 (2000).

Physics

Condensed Matter

Superconductivity

5 pages including 2 eps figures, submitted to Phys. Rev. B. The discussions have been significantly modified. The paper now co

Scientific paper

10.1103/PhysRevB.62.626

The thermal conductivity \kappa of Bi-2212 is measured in pure and Zn-doped crystals as a function of temperature and magnetic field. The in-plane resistivity is also measured on the identical samples. Using these data, we make a crude estimate of the impurity-scattering rate \Gamma of the pure and the Zn-doped crystals. Our measurement show that the "plateau" in the \kappa(H) profile is not observed in the majority of our Bi-2212 crystals, including one of the cleanest crystals available to date. The estimated values of \Gamma for the pure and Zn-doped samples allow us to compare the \kappa(H) data with the existing theories of the quasiparticle heat transport in d-wave superconductors under magnetic field. Our analysis indicates that a proper inclusion of the quasiparticle-vortex scattering, which is expected to play the key role in the peculiar behavior of the \kappa(H), is important for a quantitative understanding of the QP heat transport in the presence of the vortices.

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