Thermal conductivity of the c-axis aligned (Bi,Pb)2Sr2Ca2Cu3Oy in the superconducting and mixed states

M. Matsukawa, K. Iwasaki, K. Noto, T. Sasaki, N. Kobayashi, K. Yoshida, K. Zikihara, M. Ishihara

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3 Citations (Scopus)

Abstract

The thermal conductivity of a c-axis aligned BPSCCO polycrystal in the superconducting and mixed states has been studied as a function of temperature and magnetic field up to 14 T along the c-axis. Comparing the κ data of a semiconducting sample with those of a metallic sample, an observed anomaly in κ below Tc is attributed to the electronic thermal conductivity Ke and seems to be explained by the electron-electron interaction model based on a strong suppression of the quasiparticle scattering rate in the superconducting state. A peak value in κ decreases and its position shifts to higher temperatures with increasing field strength. This behaviour in κ(T) is roughly described by the Kadanoff-Martin expression in κse taking into account quasi-particle scattering by quasiparticles in the normal core at several fixed fields. The K-M expression extended to the mixed state qualitatively explains an observed nonlinear field dependence of κ(H) at several fixed temperatures.

Original languageEnglish
Pages (from-to)255-262
Number of pages8
JournalCryogenics
Volume37
Issue number5
DOIs
Publication statusPublished - 1997 May

Keywords

  • Bi,Pb)SrCaCuO
  • Mixed state
  • Quasiparticles
  • Superconducting state
  • Thermal conductivity; (

ASJC Scopus subject areas

  • Materials Science(all)
  • Physics and Astronomy(all)

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    Matsukawa, M., Iwasaki, K., Noto, K., Sasaki, T., Kobayashi, N., Yoshida, K., Zikihara, K., & Ishihara, M. (1997). Thermal conductivity of the c-axis aligned (Bi,Pb)2Sr2Ca2Cu3Oy in the superconducting and mixed states. Cryogenics, 37(5), 255-262. https://doi.org/10.1016/S0011-2275(97)00011-8