Bragg-Bose glass phase in vortex states of high-$T_{\rm c}$ superconductors with sparse and weak columnar defects

Details Bragg-Bose glass phase in vortex states of high-$T_{\rm c}$ superconductors with sparse and weak columnar defects Bragg-Bose glass phase in vortex states of high-$T_{\rm c}$ superconductors with sparse and weak columnar defects

2002-12-27

arxiv.org/abs/cond-mat/0212609v1

Europhys. Lett. 65, 533 (2004).

Physics

Condensed Matter

Superconductivity

using RevTex4, 4 pages, 8 figures (5 captions)

Scientific paper

10.1209/epl/i2003-10106-3

Phase diagram of vortex states of high-$T_{\rm c}$ superconductors with {\it sparse and weak} columnar defects is obtained by large-scale Monte Carlo simulations of the three-dimensional anisotropic, frustrated XY model. The Bragg-Bose glass phase characterized by hexagonal Bragg spots and the diverging tilt modulus is observed numerically for the first time at low density of columnar defects. As the density of defects increases, the melting temperature increases owing to "selected pinning" of flux lines. When the density of defects further increases, the transition to the Bose glass phase occurs. The interstitial liquid region is observed between these two glass phases and the vortex liquid phase.

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