6 papers
Anomalous Relaxation in the XY Gauge Glass
Beom Jun Kim, M. Y. Choi, S. Ryu +1
To study relaxation dynamics of the two-dimensional XY gauge glass, we integrate directly the equations of motion and investigate the energy function. As usual, it decays exponenti…
Dynamical Phase Transition in a Driven Disordered Vortex Lattice
Seungoh Ryu, M. Hellerqvist, S. Doniach +2
Using Langevin dynamics, we have investigated the dynamics of vortices in a disordered two dimensional superconductor subjected to a uniform driving current. The results provide di…
Field-driven topological glass transition in a model flux line lattice
Seungoh Ryu, A. Kapitulnik, S. Doniach
We show that the flux line lattice in a model layered HTSC becomes unstable above a critical magnetic field with respect to a plastic deformation via penetration of pairs of point-…
First-Order Melting and Dynamics of Flux Lines in a Model for YBaCuO
Seungoh Ryu, D. Stroud
We have studied the statics and dynamics of flux lines in a model for YBCO, using both Monte Carlo simulations and Langevin dynamics. For a clean system, both approaches yield the…
Dynamics of An Underdamped Josephson Junction Ladder
Seungoh Ryu, Wenbin Yu, D. Stroud
We show analytically that the dynamical equations for an underdamped ladder of coupled small Josephson junctions can be approximately reduced to the discrete sine-Gordon equation.…
Effects of Columnar Pins on Flux Line Dynamics
Seungoh Ryu, A. Kapitulnik, S. Doniach
The effects of columnar pins on the flux lines in a model High-Tc superconductor in an applied field are studied through Monte Carlo simulations. An analytic solution for a single…