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Superconducting energy gap of BaPb/sub 1-//sub x/Bi/sub x/O/sub 3/

Journal Article · · Phys. Rev. B: Condens. Matter; (United States)
We report the first infrared measurement of the superconducting energy gap of BaPb/sub 1-//sub x/Bi/sub x/O/sub 3/. In our polycrystalline samples with T/sub c/approx. =9.5 K (xapprox. =0.2) we obtain 2..delta..approx. =3.2kT/sub c/, roughly in agreement with the weak-coupling Bardeen-Cooper-Schrieffer prediction, 2..delta.. = 3.5kT/sub c/, and with tunneling measurements of the gap. We do not observe any structure above the gap energy associated with strong coupling.
Research Organization:
IBM Research Division, Thomas J. Watson Research Center, P.O. Box 218, Yorktown Heights, New York 10598
OSTI ID:
6725927
Journal Information:
Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 38:13; ISSN PRBMD
Country of Publication:
United States
Language:
English