Disappearance of superconductivity in overdoped La sub 2 minus x Sr sub x CuO sub 4 at a structural phase boundary
Journal Article
·
· Physical Review Letters; (United States)
- AT T Bell Laboratories, Murray Hill, New Jersey 07974 (United States)
- Laboratoire de Cristallographie, Centre National de la Recherche Scientifique-UJF, Boite Postale 166, 38042 Grenoble CEDEX 09 (France)
- Brookhaven National Laboratory, Upton, New York 11973 (United States)
The electronic and structural phase diagram of heavily doped La{sub 2{minus}{ital x}}Sr{sub {ital x}}CuO{sub 4} (0.15{le}{ital x}{le}0.3) is reexamined. We demonstrate that the disappearance of superconductivity in overdoped'' La{sub 2{minus}{ital x}}Sr{sub {ital x}}CuO{sub 4} is associated with an orthorhombic to tetragonal structural phase transition near {ital x}=0.2, implying a relationship between superconductivity and subtle structural change. The bulk superconducting phase is thus confined to a much narrower composition range than believed. A complete solid solution of La and Sr is observed in the composition range investigated.
- DOE Contract Number:
- AC02-76CH00016
- OSTI ID:
- 7110976
- Journal Information:
- Physical Review Letters; (United States), Journal Name: Physical Review Letters; (United States) Vol. 68:25; ISSN PRLTA; ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360207 -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
ALKALINE EARTH METAL COMPOUNDS
CHALCOGENIDES
CHEMICAL COMPOSITION
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL DOPING
CRYSTAL STRUCTURE
CRYSTAL-PHASE TRANSFORMATIONS
DIAGRAMS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
HIGH-TC SUPERCONDUCTORS
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
OXIDES
OXYGEN COMPOUNDS
PHASE DIAGRAMS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTIVITY
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360207 -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
ALKALINE EARTH METAL COMPOUNDS
CHALCOGENIDES
CHEMICAL COMPOSITION
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL DOPING
CRYSTAL STRUCTURE
CRYSTAL-PHASE TRANSFORMATIONS
DIAGRAMS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
HIGH-TC SUPERCONDUCTORS
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
OXIDES
OXYGEN COMPOUNDS
PHASE DIAGRAMS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTIVITY
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE