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), Journal Name: Phys. Rev. Lett.; (United States) Vol. 61:9; ISSN PRLTA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Correlation of T/sub c/ with hole concentration in La/sub 2-//sub x/Sr/sub x/CuO/sub 4-//sub delta/ superconductors
Defect chemistry of La[sub 2-x]Sr[sub x]CuO[sub 4-x/2](O < x [le] 1)
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
·
Tue Sep 01 00:00:00 EDT 1987
· Phys. Rev. B: Condens. Matter; (United States)
·
OSTI ID:6254660
Defect chemistry of La[sub 2-x]Sr[sub x]CuO[sub 4-x/2](O < x [le] 1)
Journal Article
·
Thu Dec 31 23:00:00 EST 1992
· Journal of Solid State Chemistry; (United States)
·
OSTI ID:7079125
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)
Thesis/Dissertation
·
Thu Dec 30 23:00:00 EST 1993
·
OSTI ID:111258
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
CARRIER DENSITY
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
HOLE MOBILITY
HOLES
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
MEISSNER-OCHSENFELD EFFECT
MOBILITY
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
POINT DEFECTS
PRESSURE DEPENDENCE
RARE EARTH COMPOUNDS
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
VACANCIES
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
CARRIER DENSITY
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
HOLE MOBILITY
HOLES
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
MEISSNER-OCHSENFELD EFFECT
MOBILITY
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
POINT DEFECTS
PRESSURE DEPENDENCE
RARE EARTH COMPOUNDS
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
VACANCIES