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Far-infrared transmission study of single-crystal Bi sub 2 Sr sub 2 Ca sub 1 Cu sub 2 O sub x superconductors

Journal Article · · Physical Review Letters; (USA)
; ; ; ;  [1]
  1. Department of Physics, State University of New York, Stony Brook, NY (USA) Department of Physics, University of Florida, Gainesville, FL (USA) National Synchroton Light Source, Brookhaven National Laboratory, Upton, NY (USA)
We report the infrared transmission of free-standing single crystals of the high-temperature superconductor Bi{sub 2}Sr{sub 2}Ca{sub 1}Cu{sub 2}O{sub {ital x}}, at temperatures between 25 and 300 K and at frequencies covering the range of 1.5{ital k}{sub {ital B}T{ital c}}{l angle}{h bar}{omega}{lt}12{ital k}{sub {ital B}T{ital c}}. The normal-state Drude relaxation rate follows a linear temperature dependence {h bar}/{tau}=3{ital k}{sub {ital B}T}. In the superconducting state there is no indication of a transmission peak, which characterizes a superconducting gap in the optical conductivity. We suggest that a strong pair-breaking interaction is responsible for this null result.
DOE Contract Number:
AC02-76CH00016
OSTI ID:
6281054
Journal Information:
Physical Review Letters; (USA), Journal Name: Physical Review Letters; (USA) Vol. 65:15; ISSN PRLTA; ISSN 0031-9007
Country of Publication:
United States
Language:
English