Anomalous disappearance of high-T/sub c/ superconductivity at high hole concentration in metallic La/sub 2-//sub x/Sr/sub x/CuO/sub 4/
Journal Article
·
· Phys. Rev. Lett.; (United States)
Samples of La/sub 2-//sub x/Sr/sub x/CuO/sub 4-//sub delta/ have previously shown a maximum concentration of p = 0.15 holes per (CuO/sub 2/) unit, because increasing x>0.15 normally induces compensating oxygen vacancies. Annealing samples in 100 bars of oxygen pressure fills the oxygen vacancies and greatly increases the range of accessible hole concentrations, up to p = 0.40 (or effectively Cu/sup +2.40/). We find that T/sub c/ is constant at approx.36 K from p = 0.15 to 0.24, where it begins to decrease. Beyond papprox. =0.32, superconductivity disappears, even though the samples are more conducting.
- Research Organization:
- IBM Research Division, Almaden Research Center, San Jose, California 95120
- OSTI ID:
- 6866220
- Journal Information:
- Phys. Rev. Lett.; (United States), Vol. 61:9
- Country of Publication:
- United States
- Language:
- English
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Synthesis, characterization, phase diagrams and superconducting and normal state magnetic properties of La2-xSrxCuO4 (0 ≤ x ≤ 0.08) and electrochemically oxidized La2-xSrxCuO4+δ (0 ≤ x ≤ 0.33, 0 ≤ δ ≤ 0.12)
Synthesis, characterization, phase diagrams and superconducting and normal state magnetic properties of La{sub 2-x}Sr{sub x}CuO{sub 4} (0 {le} x {le} 0.08) and electrochemically oxidized La{sub 2-x}Sr{sub x}CuO{sub 4+{delta}} (0 {le} x {le} 0.33, 0 {le} {delta} {le} 0.12)
Journal Article
·
Mon Jan 01 00:00:00 EST 1990
· Physical Review, B: Condensed Matter; (USA)
·
OSTI ID:6866220
Synthesis, characterization, phase diagrams and superconducting and normal state magnetic properties of La2-xSrxCuO4 (0 ≤ x ≤ 0.08) and electrochemically oxidized La2-xSrxCuO4+δ (0 ≤ x ≤ 0.33, 0 ≤ δ ≤ 0.12)
Thesis/Dissertation
·
Sun Aug 01 00:00:00 EDT 1993
·
OSTI ID:6866220
Synthesis, characterization, phase diagrams and superconducting and normal state magnetic properties of La{sub 2-x}Sr{sub x}CuO{sub 4} (0 {le} x {le} 0.08) and electrochemically oxidized La{sub 2-x}Sr{sub x}CuO{sub 4+{delta}} (0 {le} x {le} 0.33, 0 {le} {delta} {le} 0.12)
Miscellaneous
·
Fri Dec 31 00:00:00 EST 1993
·
OSTI ID:6866220
Related Subjects
36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
COPPER OXIDES
CARRIER DENSITY
MEISSNER-OCHSENFELD EFFECT
TRANSITION TEMPERATURE
LANTHANUM OXIDES
STRONTIUM OXIDES
HOLE MOBILITY
HOLES
PRESSURE DEPENDENCE
VACANCIES
ALKALINE EARTH METAL COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
LANTHANUM COMPOUNDS
MOBILITY
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
POINT DEFECTS
RARE EARTH COMPOUNDS
STRONTIUM COMPOUNDS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
360204* - Ceramics
Cermets
& Refractories- Physical Properties
656100 - Condensed Matter Physics- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
COPPER OXIDES
CARRIER DENSITY
MEISSNER-OCHSENFELD EFFECT
TRANSITION TEMPERATURE
LANTHANUM OXIDES
STRONTIUM OXIDES
HOLE MOBILITY
HOLES
PRESSURE DEPENDENCE
VACANCIES
ALKALINE EARTH METAL COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
LANTHANUM COMPOUNDS
MOBILITY
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
POINT DEFECTS
RARE EARTH COMPOUNDS
STRONTIUM COMPOUNDS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
360204* - Ceramics
Cermets
& Refractories- Physical Properties
656100 - Condensed Matter Physics- Superconductivity