Critical dynamics of superconducting Bi2Sr2CaCu2O8+δ films

D. Osborn, J. Van Harlingen, Vivek Aji, Nigel Goldenfeld, S. Oh, N. Eckstein

Research output: Contribution to journalArticle

Abstract

We report on a systematic investigation of the critical fluctuations in the complex conductivity of epitaxially grown Bi2Sr 2CaCu2O8+δ films for T≲T c using a two-coil inductive technique at zero applied field. We observe the static three-dimensional (3D) XY critical exponent in the superfluid density near Tc. Linear scaling analysis close to the critical temperature yields a dynamic critical exponent of z≈2.0 for small drive currents, but nonlinear effects are seen to be important. At T c, a nonlinear scaling analysis also yields a 3D dynamic exponent of z = 2.0 ± 0.1.

Original languageEnglish (US)
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume68
Issue number14
DOIs
StatePublished - 2003

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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