Transport studies of La/sub 2-//sub x/Sr/sub x/CuO/sub 4/ near the insulator-metal-superconductor transition
Journal Article
·
· Phys. Rev. B: Condens. Matter; (United States)
We have measured the temperature-dependent resistivities of a series of samples of La/sub 2-//sub x/Sr/sub x/CuO/sub 4/ with 0.02less than or equal toxless than or equal to0.1 over the temperature range 0.05 Kless than or equal toTless than or equal to300 K. We find the onset of superconductivity as x is increased to be correlated with a substantial drop in the magnitude of the normal-state resistivity. We observe no change, however, in the qualitative shape of the resistivity as the superconducting threshold is crossed. We also find that the low-temperature (Tless than or equal to8.0 K) resistivities of the least concentrated samples can be described by variable range hopping, with a crossover between Coulomb gap and single-particle behavior occurring as x is increased.
- Research Organization:
- The James Franck Institute and Department of Physics, The University of Chicago, Chicago, Illinois 60637
- OSTI ID:
- 6182593
- Journal Information:
- Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 39:13; ISSN PRBMD
- Country of Publication:
- United States
- Language:
- English
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Thu Sep 01 00:00:00 EDT 1988
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OSTI ID:7090191
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Sat Oct 01 00:00:00 EDT 1988
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·
OSTI ID:6725788
Superconductivity at 40 K in the oxygen-defect perovskites La/sub 2-x/Sr/sub x/CuO/sub 4-y/
Journal Article
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Thu Mar 12 23:00:00 EST 1987
· Science (Washington, D.C.); (United States)
·
OSTI ID:6228707
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
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
COULOMB ENERGY
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ENERGY
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
LOW TEMPERATURE
MEDIUM TEMPERATURE
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTIVITY
TEMPERATURE DEPENDENCE
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
TRANSPORT THEORY
ULTRALOW TEMPERATURE
VERY LOW TEMPERATURE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
COULOMB ENERGY
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ENERGY
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
LOW TEMPERATURE
MEDIUM TEMPERATURE
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTIVITY
TEMPERATURE DEPENDENCE
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
TRANSPORT THEORY
ULTRALOW TEMPERATURE
VERY LOW TEMPERATURE