Eur. Phys. J. B (2013) 86: 325
https://doi.org/10.1140/epjb/e2013-40056-9

Regular Article

Vortex dynamics in high-Tc superconductors with sparse weak columnar defects

¹ Center for Statistical and Theoretical Condensed Matter Physics, Zhejiang Normal University, Jinhua 321004, P.R. China
² Department of Physics, Zhejiang University, Hangzhou 310027, P.R. China

^a e-mail: qhchen@zju.edu.cn

Received: 24 January 2013
Received in final form: 30 April 2013
Published online: 17 July 2013

Abstract

We have performed large-scale dynamical simulations on the current-driven three-dimensional frustrated anisotropic XY model with sparse weak columnar defects. Below the matching field, a moving Bose glass phase with superconducting coherence but without spatial order is observed at low temperatures. For very small columnar defect concentrations, a moving Bragg glass phase with both superconducting coherence and hexagonal Bragg peaks can be formed. Both the moving Bose glass and Bragg glass phases dynamically melt into a moving smectic via a first-order phase transition. It is suggested that the proliferation of dislocations mediates the dynamical melting in both cases.