Anisotropic optical properties of YBa sub 2 Cu sub 3 O sub 7

Journal Article · Mon Jun 15 04:00:00 EDT 1992 · Journal of Applied Physics; (United States)

DOI:https://doi.org/10.1063/1.350454· OSTI ID:7110936

Nee, T ^[1]

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1. Research Department, Naval Air Warfare Center Weapons Division, China Lake, California 93555-6001 (United States)

Based upon the published results of YBa{sub 2}Cu{sub 3}O{sub 7} single-crystal reflectance spectra measured at room temperature, the empirical anisotropic spectral density functions and quasidielectric functions {epsilon}{sub 1{ital j}}+{ital i}{epsilon}{sub 2{ital j}} ({ital j}={ital a},{ital b},{ital c}) are determined in the 0.05 to 6 eV spectral range. These functions are an excellent fit to the reflectance spectra of samples in single-crystal, twin-crystal, and polycrystalline forms; they agree well with the published anisotropic transport and ellipsometry data. For polarizations along the {ital a} and {ital b} axes, the numerically determined empirical spectral density functions have shown two interband absorption peaks at 2.5 and 5 eV. For energy above 3 eV, the spectral density functions do not agree with the published theoretical interband conductivities that are derived from the band structure calculations.

• OSTI ID: 7110936
• Journal Information: Journal of Applied Physics; (United States), Journal Name: Journal of Applied Physics; (United States) Vol. 71:12; ISSN 0021-8979; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
ABSORPTION
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
FUNCTIONS
HIGH-TC SUPERCONDUCTORS
OPTICAL PROPERTIES
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
REFLECTION
SORPTION
SPECTRAL DENSITY
SPECTRAL FUNCTIONS
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES