In-plane paraconductivity in a single crystal of superconducting YBa/sub 2/Cu/sub 3/O/sub 7-//sub x/
Resistivity measurements have been made in the a-b plane on a single-crystal sample of superconducting YBa/sub 2/Cu/sub 3/O/sub 7-//sub x/. The resistivity versus temperature curve shows a highly linear region between 150 and 240 K, with an upward deviation from linearity at 240 K. With decreasing temperature below 150 K, the resistivity curve also deviates from linearity; this deviation has been analyzed in terms of the Aslamazov-Larkin, Lawrence-Doniach, and Maki-Thompson paraconductivity theories. All three theories can be fit to the data, but the Lawrence-Doniach model gives the best fit to the data, with physically reasonable parameters. We find that the Ginzburg-Landau coherence length in the c direction, extrapolated to low temperature with the theoretical temperature dependence, is approximately 0.44 A.
- Research Organization:
- Department of Physics and Materials Research Laboratory, University of Illinois at Urbana-Champaign, 1110 West Green Street, Urbana, Illinois 61801
- OSTI ID:
- 6479608
- Journal Information:
- Phys. Rev. B: Condens. Matter; (United States), Vol. 39:7
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
BARIUM OXIDES
ELECTRIC CONDUCTIVITY
COPPER OXIDES
YTTRIUM OXIDES
COHERENCE LENGTH
EXPERIMENTAL DATA
FLUCTUATIONS
LOW TEMPERATURE
MONOCRYSTALS
SUPERCONDUCTORS
TEMPERATURE DEPENDENCE
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
CRYSTALS
DATA
DIMENSIONS
ELECTRICAL PROPERTIES
INFORMATION
LENGTH
NUMERICAL DATA
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
TRANSITION ELEMENT COMPOUNDS
VARIATIONS
YTTRIUM COMPOUNDS
360204* - Ceramics
Cermets
& Refractories- Physical Properties
656100 - Condensed Matter Physics- Superconductivity