Far-infrared spectra of polycrystalline Ba2YCu3O9-

G. A. Thomas, H. K. Ng, A. J. Millis, Ravindra N. Bhatt, Robert Joseph Cava, E. A. Rietman, D. W. Johnson, G. P. Espinosa, J. M. Vandenberg

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Abstract

We present far-infrared reflectivity spectra of seven samples of ceramic superconductors in the Ba-Y-Cu-O system with transition temperatures near 93 K. We find superconducting gap structures on the basis of which we estimate the ratio of twice the average gap to the transition temperature to be consistent with 3.5, but possibly higher. Questions of normal-state characterization preclude a definitive analysis.

Original languageEnglish (US)
Pages (from-to)846-849
Number of pages4
JournalPhysical Review B
Volume36
Issue number1
DOIs
StatePublished - Jan 1 1987
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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