Temperature dependence of the penetration depth of yba2cu3o7-δ films near tc

Z. H. Lin, G. C. Spalding, Allen M Goldman, Benjamin F Bayman, Oriol T Valls

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Abstract

The temperature dependence of the penetration depth, λ of films of YBa2Cu3O7-δ measured using radio frequency techniques, has been found to have a mean-field-like exponent well within some estimates of the critical region. This result is found only if finite-size boundary conditions at the film edge are included in the analysis. This observation agrees with a recent renormalization group calculation in which the critical exponent for λ is mean-field-like, while the others are YY-like. It could also imply that the critical regime has not been reached, but then recent heat capacity measurements with AY-like behavior would have to be flawed.

Original languageEnglish (US)
Pages (from-to)573-578
Number of pages6
JournalEPL
Volume32
Issue number7
DOIs
StatePublished - Dec 1 1995

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