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 language||English (US)|
|Number of pages||4|
|Journal||Physical Review B|
|State||Published - 1987|
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics