Entanglement of Solid Vortex Matter: A Boomerang Shaped Reduction Forced by Disorder in Interlayer Phase Coherence in Bi2Sr2CaCu2O8+y
Abstract
We present evidence for entangled solid vortex matter in a glassy state in a layered superconductor BiSrCaCuO 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.
Keywords
Cite
@article{arxiv.0806.2352,
title = {Entanglement of Solid Vortex Matter: A Boomerang Shaped Reduction Forced by Disorder in Interlayer Phase Coherence in Bi2Sr2CaCu2O8+y},
author = {T. Kato and T. Shibauchi and Y. Matsuda and J. R. Thompson and L. Krusin-Elbaum},
journal= {arXiv preprint arXiv:0806.2352},
year = {2008}
}
Comments
4 pages, 4 figures, accepted for publication in Phys. Rev. Lett