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 00:00:00 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), Vol. 25:11; ISSN 0018-9197
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
36 MATERIALS SCIENCE
BARIUM OXIDES
SUPERCONDUCTIVITY
BISMUTH OXIDES
CALCIUM OXIDES
COPPER OXIDES
STRONTIUM OXIDES
SUPERCONDUCTORS
ENERGY GAP
YTTRIUM OXIDES
ANISOTROPY
ELECTRONIC STRUCTURE
HIGH TEMPERATURE
OPTICAL PROPERTIES
QUASI PARTICLES
RAMAN SPECTRA
SCATTERING
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BISMUTH COMPOUNDS
CALCIUM COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SPECTRA
STRONTIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
656100* - Condensed Matter Physics- Superconductivity
360204 - Ceramics
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