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Raman scattering from superconducting gap excitations in single-crystal YBa/sub 2/Cu/sub 3/O/sub 7-//sub delta/

Journal Article · · Phys. Rev. B: Condens. Matter; (United States)
; ; ; ;
The results of a polarized light scattering study of single-crystal YBa/sub 2/Cu/sub 3/O/sub 7-//sub delta/ are presented. Strong interband electronic scattering in YBa/sub 2/Cu/sub 3/O/sub 7-//sub delta/ is observed through interference effects with certain phonons. Below T/sub c/, this electronic scattering undergoes a redistribution due to gap formation, which is monitored by a rapid change in the damping rates of the strongly coupled phonons. Our lowest temperature data further indicates the presence of residual electronic scattering well below the expected 2..delta.. gap onset, suggesting that a continuum of electronic states exists inside the gap.
Research Organization:
Department of Physics and Materials Research Laboratory, University of Illinois at Urbana-Champaign, 1110 West Green Street, Urbana, Illinois 61801
OSTI ID:
5443776
Journal Information:
Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 37:10; ISSN PRBMD
Country of Publication:
United States
Language:
English

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Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BACKSCATTERING
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRYSTALS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTROMAGNETIC RADIATION
ELECTRONIC STRUCTURE
ELECTRONS
ELEMENTARY PARTICLES
ENERGY GAP
FERMIONS
INTERFERENCE
LASER RADIATION
LEPTONS
MONOCRYSTALS
OXIDES
OXYGEN COMPOUNDS
PHONONS
PHYSICAL PROPERTIES
POLARIZATION
QUASI PARTICLES
RADIATIONS
RAMAN EFFECT
SCATTERING
SUPERCONDUCTIVITY
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES