Phys. Rev. Lett. 101, 027003 (2008) [4 pages]
Entanglement of Solid Vortex Matter: A Boomerang-Shaped Reduction Forced by Disorder in Interlayer Phase Coherence in Bi2Sr2CaCu2O8+y
Abstract
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Citing Articles
T. Kato, 1 T. Shibauchi, 1 Y. Matsuda, 1,2 J. R. Thompson, 3,4 and L. Krusin-Elbaum51Department of Physics, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
2Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan
3Department of Physics and Astronomy, The University of Tennessee, Knoxville, Tennessee 37996, USA
4Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
5IBM T. J. Watson Research Center, Yorktown Heights, New York 10598, USA
Received 2 April 2008; published 10 July 2008
We present evidence for entangled solid vortex matter in a glassy state in a layered superconductor Bi2Sr2CaCu2O8+y containing randomly splayed linear defects. The interlayer phase coherence—probed by the Josephson plasma resonance—is enhanced at high temperatures, reflecting the recoupling of vortex liquid by the defects. At low temperatures in the vortex solid state, the interlayer coherence follows a boomerang-shaped reentrant temperature path with an unusual low-field decrease in coherence, indicative of meandering vortices. We uncover a distinct temperature scaling between in-plane and out-of-plane critical currents with opposing dependencies on field and time, consistent with the theoretically proposed “splayed-glass” state.
©2008 The American Physical Society
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