Unusual magnetic-field dependence of the electrothermal conductivity in the mixed state of cuprate superconductors

J. Clayhold, Y. Xue, C. Chu, J. Eckstein, I. Bozovic

Research output: Contribution to journalArticle

Abstract

In the mixed state of a superconductor, the electrothermal conductivity, P, which measures the electrical current density produced by a thermal gradient, is supposed to be independent of both the magnetic field and the details of the vortex motion. Measurements of the thermopower and resistivity in YBa2Cu3O7-δ, Bi2Sr2CaCu2O8+δ, and TI2Ba2CaCu2O8+δ show an unusual, sharp structure in P at low field. In Bi2Sr2CaCu2O8+δ, the extra contribution is negative, causing a sign change of the thermopower versus applied magnetic field. The possible origins of the low-field anomaly are discussed.

Original languageEnglish (US)
Pages (from-to)8681-8686
Number of pages6
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume53
Issue number13
DOIs
StatePublished - Jan 1 1996
Externally publishedYes

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ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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