Frequency- and temperature-dependent conductivity in YBa sub 2 Cu sub 3 O sub 6+ x crystals
Journal Article
·
· Physical Review, B: Condensed Matter; (USA)
- AT T Bell Laboratories, Murray Hill, NJ (USA)
The results of a systematic study of the optical properties of the YBa{sub 2}Cu{sub 3}O{sub 6+{ital x}}-based insulators and superconductors are reported. Specifically, we present measurements and analysis of the optical reflectivity {ital R} of a series of YBa{sub 2}Cu{sub 3}O{sub 6+{ital x}} crystals in the frequency range from 30 to 20 000 cm{sup {minus}1} (4 meV to 2.5 eV), and temperature range from 10 to 270 K. From {ital R} we obtain the real part of the frequency-dependent optical conductivity {sigma}({omega}) by Kramers-Kronig analysis. In our discussion, we emphasize the development of structure and spectral weight in {sigma}({omega}) as the compounds change from insulators to high-{Tc} superconductors with varying O content or Al doping. We identify the free carrier, and interband components of {sigma}({omega}), and focus on the free-carrier component.
- OSTI ID:
- 6000077
- Journal Information:
- Physical Review, B: Condensed Matter; (USA), Journal Name: Physical Review, B: Condensed Matter; (USA) Vol. 42:10; ISSN 0163-1829; ISSN PRBMD
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CARRIER DENSITY
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ENERGY GAP
FREQUENCY DEPENDENCE
INELASTIC SCATTERING
LOW TEMPERATURE
OPTICAL PROPERTIES
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
REFLECTIVITY
SCATTERING
SUPERCONDUCTIVITY
SURFACE PROPERTIES
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
ULTRALOW TEMPERATURE
VERY LOW TEMPERATURE
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CARRIER DENSITY
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ENERGY GAP
FREQUENCY DEPENDENCE
INELASTIC SCATTERING
LOW TEMPERATURE
OPTICAL PROPERTIES
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
REFLECTIVITY
SCATTERING
SUPERCONDUCTIVITY
SURFACE PROPERTIES
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
ULTRALOW TEMPERATURE
VERY LOW TEMPERATURE
YTTRIUM COMPOUNDS
YTTRIUM OXIDES