Tunneling measurements on the high-T/sub c/ superconductors La/sub 1. 85/Sr/sub 0. 15/CuO/sub 4-//sub delta/ and YBa/sub 2/Cu/sub 3/O/sub 7-//sub delta/
Journal Article
·
· Phys. Rev. B: Condens. Matter; (United States)
We have measured the superconducting properties of the new high-T/sub c/ superconductors La/sub 1.85/Sr/sub 0.15/CuO/sub 4-//sub delta/ and YBa/sub 2/Cu/sub 3/O/sub 7-//sub delta/ by electron tunneling. The measured I-V curves can be described neatly with simple tunneling theory, using the Bardeen-Cooper-Schreiffer density of states for the superconductor. For the La-Sr compound we find an energy gap ranging between 10 and 20 meV. By exerting a large pressure on the sample the gap value could be increased to 35 meV. From these measurements we extract 2..delta../k/sub B/T/sub c/ = 3.5--4. For the Y-Ba compound we find a pressure-independent gap 2..delta.. = 23 +- 2 meV or 2..delta../k/sub B/T/sub c/ = 3.2 +- 0.4.
- Research Organization:
- Research Institute for Materials, University of Nijmegen, Toernooiveld, 6525ED Nijmegen, The Netherlands
- OSTI ID:
- 6511504
- Journal Information:
- Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 36:1; ISSN PRBMD
- Country of Publication:
- United States
- Language:
- English
Similar Records
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High-field measurements on the high-T/sub c/ superconductors La/sub 1. 85/Sr/sub 0. 15/CuO/sub 4-//sub delta/ and YBa/sub 2/Cu/sub 3/O/sub 7-//sub delta/
Energy gap in La/sub 1. 85/Sr/sub 0. 15/CuO/sub 4-//sub y/ from point-contact tunneling
Journal Article
·
Thu Oct 31 23:00:00 EST 1996
· Journal of Low Temperature Physics
·
OSTI ID:457216
High-field measurements on the high-T/sub c/ superconductors La/sub 1. 85/Sr/sub 0. 15/CuO/sub 4-//sub delta/ and YBa/sub 2/Cu/sub 3/O/sub 7-//sub delta/
Journal Article
·
Thu Oct 01 00:00:00 EDT 1987
· Phys. Rev. B: Condens. Matter; (United States)
·
OSTI ID:5986259
Energy gap in La/sub 1. 85/Sr/sub 0. 15/CuO/sub 4-//sub y/ from point-contact tunneling
Journal Article
·
Fri May 01 00:00:00 EDT 1987
· Phys. Rev. B: Condens. Matter; (United States)
·
OSTI ID:5923017
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
BARIUM COMPOUNDS
BARIUM OXIDES
BCS THEORY
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
DATA
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ENERGY GAP
EXPERIMENTAL DATA
INFORMATION
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
LOW TEMPERATURE
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
PRESSURE DEPENDENCE
RARE EARTH COMPOUNDS
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTIVITY
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
TUNNEL EFFECT
YTTRIUM COMPOUNDS
YTTRIUM OXIDES
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
656100 -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
BCS THEORY
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
DATA
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ENERGY GAP
EXPERIMENTAL DATA
INFORMATION
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
LOW TEMPERATURE
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
PRESSURE DEPENDENCE
RARE EARTH COMPOUNDS
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
SUPERCONDUCTIVITY
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
TUNNEL EFFECT
YTTRIUM COMPOUNDS
YTTRIUM OXIDES