Correlation between axial-oxygen anharmonicity and T sub c in YBa sub 2 Cu sub 3 O sub 7 and related compounds

Journal Article · Thu Aug 01 04:00:00 EDT 1991 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.44.2422· OSTI ID:5363555

Mustre de Leon, J; Conradson, S D; Batistic, I; Bishop, A R ^[1]

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1. Los Alamos National Laboratory, Los Alamos, New Mexico (USA)

Cu-O radial distribution functions in YBa{sub 2}Cu{sub 3}O{sub 7}, YBa{sub 2}Cu{sub 3}O{sub 6.5}, and YBa{sub 2}Cu{sub 2.8}Co{sub 0.2}O{sub 7+{delta}} at 10 K have been determined from Cu {ital K}-edge polarized extended x-ray-absorption fine structure of these materials, using model potentials to describe the effect of the Cu-O relative motion. The analysis shows that the axial oxygen atom moves in a double-well potential. A correlation between interwell tunneling and {ital T}{sub {ital c}} is observed, and interpreted as a correlation between anharmonicity and {ital T}{sub {ital c}}.

• OSTI ID: 5363555
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 44:5; ISSN PRBMD; ISSN 0163-1829
• Country of Publication: United States
• Language: English

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
AMINES
AMMONIUM COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COBALT COMPOUNDS
COBALT OXIDES
COPPER COMPOUNDS
CORRELATION FUNCTIONS
CUPRATES
FUNCTIONS
HIGH-TC SUPERCONDUCTORS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
QUATERNARY COMPOUNDS
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
YTTRIUM COMPOUNDS
YTTRIUM OXIDES