Hall effect above T sub c in untwinned single-crystal YBa sub 2 Cu sub 3 O sub 7 minus x : Normal-state behavior and superconducting fluctuations

Journal Article · Fri Nov 01 04:00:00 EST 1991 · Physical Review, B: Condensed Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.44.10158· OSTI ID:6188870

Rice, J P; Giapintzakis, J; Ginsberg, D M; Mochel, J M ^[1]

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1. Department of Physics and Materials Research Laboratory, University of Illinois at Urbana-Champaign, 1110 West Green Street, Urbana, Illinois (USA)

We present a measurement of the Hall coefficient {ital R}{sub {ital H}} for an untwinned single crystal of YBa{sub 2}Cu{sub 3}O{sub 7{minus}{ital x}}. The crystal was produced by a method that does not involve thermomechanical detwinning, and has a resistivity along the copper-oxide chains of only 29 {mu}{Omega} cm at 100 K, indicating high sample quality. The in-plane resistivity and 1/{ital R}{sub {ital H}} become linear in temperature as {ital T} rises significantly above {ital T}{sub {ital c}}. Near {ital T}{sub {ital c}} we observe deviation from this linearity, and we interpret it as indicating thermodynamic fluctuations in a layered superconductor. Fits of this model to both the resistivity and Hall-effect data yield physically reasonable values for the fitting parameters. Evidence is obtained that the two copper-oxide planes in each unit cell are tightly coupled, acting as one superconducting layer. Surprisingly, the best fits indicate that the Hall-effect fluctuations are dominated by the Maki-Thompson process rather than the Aslamazov-Larkin process.

• OSTI ID: 6188870
• Journal Information: Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 44:18; ISSN PRBMD; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
360207 -- Ceramics
Cermets
& Refractories-- Superconducting Properties-- (1992-)
665411 -- Basic Superconductivity Studies-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALKALINE EARTH METAL COMPOUNDS
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
COPPER COMPOUNDS
COPPER OXIDES
CRYSTALS
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
FLUCTUATIONS
HALL EFFECT
HIGH-TC SUPERCONDUCTORS
MONOCRYSTALS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
SUPERCONDUCTIVITY
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
VARIATIONS
YTTRIUM COMPOUNDS
YTTRIUM OXIDES