1211.3311 (N. Pompeo et al.)

Vortex matter dynamics in YBaCuO with BaZrO3 nanocolumns as revealed by
dc and high-frequency experiments: role of anisotropy and directional pinning    [PDF]

N. Pompeo, A. Augieri, K. Torokhtii, V. Galluzzi, G. Celentano, E. Silva

Measurements of anisotropic transport properties (dc and high-frequency regime) of driven vortex matter in YBa$_2$Cu$_3$O$_{7-x}$ with elongated strong-pinning sites (c-axis aligned, self-assembled BaZrO$_3$ nanorods) are used to demonstrate that the effective-mass angular scaling takes place only in intrinsic physical quantities (flux-flow resistivity), and not in pinning-related Labusch parameter and critical currents. Comparison of the dynamics at different time scales shows evidence for a transition of the vortex matter toward a Mott phase, driven by the presence of nanorods.

View original: http://arxiv.org/abs/1211.3311