Finite vortex correlation in the c direction in YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} above the first-order melting transition

Journal Article · Sun Jun 01 04:00:00 EDT 1997 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.55.14156· OSTI ID:509039

Righi, E F; Grigera, S A; Nieva, G ^[1]; Lopez, D ^[2]; de la Cruz, F ^[1]

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1. Centro Atomico Bariloche and Instituto Balseiro, Comision Nacional de Energia Atomica, 8400 San Carlos de Bariloche (Argentina)
2. IBM Watson Research Center, Yorktown Heights, New York 10598 (United States)

The in- and out-of-plane resistivities of untwinned YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}} show that at the melting temperature of the vortex lattice T{sub m}(H), the c-axis vortex correlation length has a finite value, demonstrating that the first- order transition is a true melting and not a decoupling transition. The vortex liquid just above T{sub m}(H) has a correlation length in the field direction on the order of a micron. The in-plane I-V characteristics in the liquid state show non-Ohmic behavior, providing evidence that thermal fluctuations dominate the response even at the first-order transition. {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 509039
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 21 Vol. 55; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
66 PHYSICS
BARIUM COMPOUNDS
BARIUM OXIDES
COPPER OXIDES
ELECTRIC CONDUCTIVITY
HIGH-TC SUPERCONDUCTORS
MELTING
PHASE TRANSFORMATIONS
VORTICES
YTTRIUM COMPOUNDS
YTTRIUM OXIDES