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Phys. Rev. B 64, 060503(R) (2001) [4 pages]

Nearly field-independent in-plane vortex solid-to-liquid transition in the c-axis resistivity of oxygen deficient single crystals of YBa2Cu3O7-δ

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B. Lundqvist, Ö. Rapp, and M. Andersson
Department of Solid State Physics, Royal Institute of Technology, SE-100 44 Stockholm, Sweden

Yu. Eltsev
Superconductivity Research Laboratory, ISTEC, 10-13 Shinonome 1-chome, Kotu-ku, Tokyo 135-0062, Japan

Received 10 April 2001; published 23 July 2001

The c-axis resistivity has been measured in oxygen deficient single crystals of YBa2Cu3O7-δ (anisotropy γ≈24–29) with the magnetic field B accurately aligned parallel to the ab plane. An almost field-independent vortex solid-to-liquid transition is observed at high fields in contrast to the usual field-dependent one, which is recovered for a small misalignment between B and ab. This observation challenges previous interpretations of the same effect in the ab resistivity as coming from a smectic vortex state or a decoupling of the superconducting planes.

© 2001 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.64.060503
DOI:
10.1103/PhysRevB.64.060503
PACS:
74.72.Bk, 74.60.Ge, 74.25.Fy
 
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