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New transition in the vortex liquid state of YBa2Cu3O7−δ
Journal article   Peer reviewed

New transition in the vortex liquid state of YBa2Cu3O7−δ

Wai-Kwong Kwok, Goran Karapetrov, Ulrich Welp, Andreas Rydh, George W. Crabtree, Lisa Paulius, Jordi Figueras, Teresa Puig and X. Obradors
Physica. C, Superconductivity, v 437-438, pp 176-179
15 May 2006
DOI: https://doi.org/10.1016/j.physc.2005.12.029

Abstract

Phase transitions Superconductivity Vortex pinning
We have carried out angular dependent magneto-transport measurements on optimally doped, untwinned YBa2Cu3O7−δ crystals irradiated with high energy heavy ions to determine the onset of vortex line tension in the vortex liquid state. The dose matching field was controlled and kept at a low level to partially preserve the first order vortex lattice melting transition. A Bose glass transition is observed below the lower critical point which then transforms into a first order phase transition near 4T. We find that the locus of points which indicates the onset of vortex line tension overlaps with the Bose glass transition line at low fields and then deviates at higher fields, indicating a new transition line in the vortex liquid state. This new line in the vortex liquid phase is dose independent and extends beyond the upper critical point.

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Collaboration types
Domestic collaboration
International collaboration
Web of Science research areas
Physics, Applied
Physics, Condensed Matter
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