5 papers
Current-induced vortex dynamics in Josephson-junction arrays: Imaging experiments and model simulations
S. G. Lachenmann, T. Doderer, R. P. Huebener +4
We study the dynamics of current-biased Josephson-junction arrays with a magnetic penetration depth smaller than the lattice spacing. We compare the dynamics imaged by low-temperat…
Single-vortex-induced voltage steps in Josephson-junction arrays
P. H. E. Tiesinga, T. J. Hagenaars, J. E. van Himbergen +1
We have numerically and analytically studied ac+dc driven Josephson-junction arrays with a single vortex or with a single vortex-antivortex pair present. We find single-vortex step…
1/ω-flux-noise and dynamical critical properties of two-dimensional XY-models
P. H. E. Tiesinga, T. J. Hagenaars, J. E. van Himbergen +1
We have numerically studied the dynamic correlation functions in thermodynamic equilibrium of two-dimensional O(2)-symmetry models with either bond (RSJ) or site (TDGL) dissipation…
Vortex reflection at boundaries of Josephson-junction arrays
T. J. Hagenaars, J. E. van Himbergen, Jorge V. Jose +1
We study the propagation properties of a single vortex in square Josephson-junction arrays (JJA) with free boundaries and subject to an applied dc current. We model the dynamics of…
Nonlinear Viscous Vortex Motion in Two-Dimensional Josephson-Junction Arrays
T. J. Hagenaars, P. H. E. Tiesinga, J. E. van Himbergen +1
When a vortex in a two-dimensional Josephson junction array is driven by a constant external current it may move as a particle in a viscous medium. Here we study the nature of this…