Local octahedral tilts in La[sub 2[minus][ital x]]Ba[sub [ital x]]CuO[sub 4]: Evidence for a new structural length scale
Journal Article
·
· Physical Review Letters; (United States)
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States) Department of Applied Physics, University of Tokyo, Yayoi 2 11 16, Bunkyo-ku, Tokyo 113 (Japan)
The short-range structure in La[sub 2[minus][ital x]]Ba[sub [ital x]]CuO[sub 4] is examined by obtaining the pair distribution function from neutron powder diffraction data. In contrast to the predictions of the crystal structure models, locally, the CuO[sub 6] octahedra do not change their tilt direction at the low-temperature tetragonal (LTT) to low-temperature orthorhombic (LTO) phase transition: they always tilt in the [110] (LTT) directions. The long-range structures of the high-temperature phases result from coherent superpositions of the local LTT variants. The local tilt order extends over [similar to]1 nm. We discuss the implications of this local structure for the properties.
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 5114037
- Journal Information:
- Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 72:14; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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Conference
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Fri Sep 01 00:00:00 EDT 1995
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OSTI ID:94088
Charge-stripe ordering from local octahedral tilts: Underdoped and superconducting La{sub 2{minus}x}Sr{sub x}CuO{sub 4}thinsp(0{le}x{le}0.30)
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Sun Jan 31 23:00:00 EST 1999
· Physical Review, B: Condensed Matter
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OSTI ID:304262
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Journal Article
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Sun Nov 27 23:00:00 EST 1994
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OSTI ID:6736163
Related Subjects
36 MATERIALS SCIENCE
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360207* -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
665100 -- Nuclear Techniques in Condensed Matter Physics -- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COHERENT SCATTERING
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL STRUCTURE
CRYSTAL-PHASE TRANSFORMATIONS
DATA ANALYSIS
DIFFRACTION
HIGH-TC SUPERCONDUCTORS
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
NEUTRON DIFFRACTION
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
RARE EARTH COMPOUNDS
SCATTERING
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360207* -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
665100 -- Nuclear Techniques in Condensed Matter Physics -- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COHERENT SCATTERING
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL STRUCTURE
CRYSTAL-PHASE TRANSFORMATIONS
DATA ANALYSIS
DIFFRACTION
HIGH-TC SUPERCONDUCTORS
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
NEUTRON DIFFRACTION
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
RARE EARTH COMPOUNDS
SCATTERING
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPOUNDS