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Phys. Rev. B 69, 180510(R) (2004) [4 pages]

Vortex solid-liquid transition in Bi2Sr2CaCu2O8+δ with a high density of strong pins

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S. Colson, C. J. van der Beek, and M. Konczykowski
Laboratoire des Solides Irradiés, CNRS-UMR 7642 & CEA/DSM/DRECAM, Ecole Polytechnique, 91128 Palaiseau, France

M. B. Gaifullin and Y. Matsuda
Institute for Solid State Physics, University of Tokyo, Kashiwanoha, Kashiwa, Chiba 277-8581, Japan

P. Gierłowski
Institute of Physics, Polish Academy of Sciences, Al. Lotnikow 32/46, 02-668 Warsaw, Poland

Ming Li and P. H. Kes
Kamerlingh Onnes Laboratorium, Leiden University, P.O. Box 9506, 2300 RA Leiden, The Netherlands

Received 16 January 2004; revised 18 March 2004; published 20 May 2004

The introduction of a large density of columnar defects in Bi2Sr2CaCu2O8+δ crystals does not, at sufficiently low vortex densities, increase the irreversibility line beyond the first order transition (FOT) field of pristine crystals. At such low fields, the flux line wandering length rw behaves as in pristine crystals. Next, vortex positional correlations along the c axis in the vortex Bose glass at fields above the FOT are smaller than in the low-field vortex solid. Third, the Bose-glass-to-vortex liquid transition is signaled by a rapid decrease in c-axis phase correlations. These observations are understood in terms of the “discrete superconductor” model.

© 2004 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.69.180510
DOI:
10.1103/PhysRevB.69.180510
PACS:
74.25.Qt, 74.25.Op, 74.25.Nf
 
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