Transport properties of ultrathin YBa[sub 2]Cu[sub 3]O[sub 7[minus][delta]] layers: Evidence for two-dimensional vortex fluctuations

Journal Article · Wed Sep 01 00:00:00 EDT 1993 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.48.6460· OSTI ID:6238549

Norton, D P; Lowndes, D H ^[1]

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1. Solid State Division, Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, Tennessee 37831-6056 (United States)

We report on the transport properties of ultrathin YBa[sub 2]Cu[sub 3]O[sub 7[minus][delta]] (YBCO) layers, and compare the results with predictions of the Ginzburg-Landau Coulomb-gas (GLCG) model for two-dimensional (2D) vortex fluctuations. We find that the normalized flux-flow resistances for several ultrathin YBCO structures collapse onto a single universal curve, as predicted by the model. In addition, the values for the Kosterlitz-Thouless transition temperature [ital T][sub KT] and the Ginzburg-Landau temperature, [ital T][sub [ital c]0], obtained by separate analyses of [ital I]-[ital V] and resistance data within the context of the GLCG model, are in general agreement. Finally, we find that the properties of a series of YBCO/Pr[sub 0.5]Ca[sub 0.5]Ba[sub 2]Cu[sub 3]O[sub 7[minus][delta]] superlattice structures are consistent with the GLCG treatment for anisotropic, 3D layered superconductors.

• DOE Contract Number: AC05-84OR21400
• OSTI ID: 6238549
• Journal Information: Physical Review, B: Condensed Matter; (United States), Vol. 48:9; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BARIUM OXIDES
ELECTRIC CONDUCTIVITY
COPPER OXIDES
YTTRIUM OXIDES
FLUCTUATIONS
GINZBURG-LANDAU THEORY
HIGH-TC SUPERCONDUCTORS
KOSTERLITZ-THOULESS THEORY
LAYERS
MAGNETIC FLUX
VORTICES
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
CHALCOGENIDES
COPPER COMPOUNDS
ELECTRICAL PROPERTIES
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SUPERCONDUCTORS
TRANSITION ELEMENT COMPOUNDS
VARIATIONS
YTTRIUM COMPOUNDS
360207* - Ceramics
Cermets
& Refractories- Superconducting Properties- (1992-)