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 language||English (US)|
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|State||Published - 2003|
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics