Gap anisotropy and phonon self-energy effects in single-crystal YBa/sub 2/Cu/sub 3/O/sub 7-//sub delta/
Journal Article
·
· Phys. Rev. B: Condens. Matter; (United States)
We report a Raman scattering investigation of superconducting gap anisotropy in single-crystal YBa/sub 2/Cu/sub 3/O/sub 7-//sub delta/. Gap anisotropy is investigated by studying the peak in the low-temperature Raman continuum in various symmetries. Roughly, a 35% difference in the energy of this peak is observed between different symmetries, suggesting the presence of substantial gap anisotropy. Anisotropy is further evidenced by the damping behavior of the 340 cm/sup -1/ Raman-active phonon below T/sub c/, which displays increased attenuation due to phonon-induced pair breaking. The temperature dependence of this attenuation is consistent with a T = 0 gap which is much larger than the 340 cm/sup -1/ phonon in certain regions of the Fermi surface.
- Research Organization:
- Department of Physics and Materials Research Laboratory, University of Illinois at Urbana-Champaign, 1110 West Green Street, Urbana, Illinois 61801
- OSTI ID:
- 6619423
- Journal Information:
- Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 38:16; ISSN PRBMD
- Country of Publication:
- United States
- Language:
- English
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OSTI ID:5561896
Superconducting gap anisotropy and phonon anomalies in single crystal NdBa{sub 2}Cu{sub 3}O{sub 7{minus}x}
Journal Article
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Wed Oct 01 00:00:00 EDT 1997
· Physical Review, B: Condensed Matter
·
OSTI ID:632648
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
ANISOTROPY
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRYSTALS
DATA
ENERGY
ENERGY GAP
ENERGY LEVELS
EXPERIMENTAL DATA
FERMI LEVEL
INFORMATION
MONOCRYSTALS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHONONS
QUASI PARTICLES
RAMAN SPECTRA
SELF-ENERGY
SPECTRA
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
ANISOTROPY
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRYSTALS
DATA
ENERGY
ENERGY GAP
ENERGY LEVELS
EXPERIMENTAL DATA
FERMI LEVEL
INFORMATION
MONOCRYSTALS
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHONONS
QUASI PARTICLES
RAMAN SPECTRA
SELF-ENERGY
SPECTRA
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES