Abstract
Measurements of the superconducting and Raman spectra in isotopically modified are reported. A decrease in of 0.65±0.10 K in samples with (75±5)% substitution of for yields an exponent of α=0.37±0.05. This interpreted as evidence for phonon-mediated pairing.
- Received 10 December 1991
DOI:https://doi.org/10.1103/PhysRevLett.68.1058
©1992 American Physical Society