Observation of the conductivity coherence peak in superconducting Bi sub 2 Sr sub 2 CaCu sub 2 O sub 8 single crystals

Journal Article · Mon Jul 01 04:00:00 EDT 1991 · Physical Review Letters; (USA)

DOI:https://doi.org/10.1103/PhysRevLett.67.152· OSTI ID:5776572

Holczer, K; Forro, L; Mihaly, L; Gruener, G ^[1]

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1. Department of Physics and Solid State Science Center, University of California, Los Angeles, Los Angeles, California 90024 (US) Department of Physics, State University of New York at Stony Brook, Stony Brook, New York 11794-3800

We have measured the surface impedance of Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8} single crystals and have evaluated the conductivity {sigma}{sub 1} at millimeter-wave frequencies. We observe a peak below {ital T}{sub {ital c}} which we suggest is due to case-II coherence factors, like the Hebel-Slichter peak observed in the NMR relaxation rate of classical superconductors. A comparison with theory leads to a large gap, suggesting strong coupling.

• OSTI ID: 5776572
• Journal Information: Physical Review Letters; (USA), Journal Name: Physical Review Letters; (USA) Vol. 67:1; ISSN PRLTA; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
BISMUTH COMPOUNDS
BISMUTH OXIDES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRYSTALS
ELECTRIC IMPEDANCE
HIGH-TC SUPERCONDUCTORS
IMPEDANCE
INTERACTIONS
LOW TEMPERATURE
MONOCRYSTALS
OXIDES
OXYGEN COMPOUNDS
PAIRING INTERACTIONS
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTORS
SURFACE PROPERTIES
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
VERY LOW TEMPERATURE