An optical investigation of electronic excitations in the high-temperature superconductors YBa/sub 2/Cu/sub 3/O/sub 7-. delta. / and Bi/sub 2/Sr/sub 2/CaCu/sub 2/O/sub 8+. Delta. /

Journal Article · Wed Nov 01 04:00:00 EST 1989 · IEEE (Institute of Electrical and Electronics Engineers) Journal of Quantum Electronics; (USA)

DOI:https://doi.org/10.1109/3.42071· OSTI ID:5283488

Slakey, F; Klein, M V; Bukowski, E D; Rice, J P; Ginsberg, D M ^[1]; Cooper, S L ^[2]

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1. Illinois Univ., Urbana, IL (USA). Loomis Lab. of Physics
2. AT and T Bell Labs., Murray Hill, NJ (USA)

The authors compare the results of Raman scattering from superconducting gap excitations in the T/sub c/ compounds YBa/sub 2/Cu/sub 3/O/sub 7-{delta}/ and Bi/sub 2/Sr/sub 2/CaCu/sub 2/O/sub 8+{Delta}/. In the normal state, both materials exhibit strong electronic interband scattering which manifests itself as a broad background continuum having both A/sub lg/ and B/sub 1g/ symmetry components. At low temperature a redistribution of this electronic scattering occurs, indicative of the formation of superconducting gap in these compounds. The two symmetries exhibit distinct redistribution however, denoting strong anisotropy. At temperatures well below T/sub c/, both compounds exhibit residual low-energy scattering, a feature suggestive of the coexistence of normal electrons and superconducting quasi-particles.

• OSTI ID: 5283488
• Journal Information: IEEE (Institute of Electrical and Electronics Engineers) Journal of Quantum Electronics; (USA), Journal Name: IEEE (Institute of Electrical and Electronics Engineers) Journal of Quantum Electronics; (USA) Vol. 25:11; ISSN 0018-9197; ISSN IEJQA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
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
BISMUTH COMPOUNDS
BISMUTH OXIDES
CALCIUM COMPOUNDS
CALCIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRONIC STRUCTURE
ENERGY GAP
HIGH TEMPERATURE
OPTICAL PROPERTIES
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
QUASI PARTICLES
RAMAN SPECTRA
SCATTERING
SPECTRA
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTIVITY
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES