Universal non stationary dynamics at the depinning transition (2009)
Kolton, Alejandro B., Schehr, Gregory, Doussal, Pierre Le
We study the non-stationary dynamics of an elastic interface in a disordered medium at the depinning transition. We compute the two-time response and correlation functions, found to be universal and...
Direct determination of the collective pinning radius in high temperature superconductors (2009)
Dolz, Moira I., Kolton, Alejandro B., Pastoriza, Hernan
We study finite-size effects at the onset of the irreversible magnetic behaviour of micron-sized Bi$_2$Sr$_2$CaCu$_2$O$_{8+\delta}$ single crystals by using silicon micro-oscillators. We find an...
Growing correlations and aging of an elastic line in a random potential (2009)
Iguain, José Luis, Bustingorry, Sebastian, Kolton, Alejandro B., Cugliandolo, Leticia F.
We study the thermally assisted relaxation of a directed elastic line in a two dimensional quenched random potential by solving numerically the Edwards-Wilkinson equation and the Monte Carlo dynamics...
Creep dynamics of elastic manifolds via exact transition pathways (2009)
Kolton, Alejandro B., Rosso, Alberto, Giamarchi, Thierry, Krauth, Werner
We study the steady state of driven elastic strings in disordered media below the depinning threshold. In the low-temperature limit, for a fixed sample, the steady state is dominated by a single...
Dynamics below the depinning threshold (2007)
Kolton, Alejandro B., Rosso, Alberto, Giamarchi, Thierry, Krauth, Werner
We study the steady-state low-temperature dynamics of an elastic line in a disordered medium below the depinning threshold. Analogously to the equilibrium dynamics, in the limit T->0, the steady...
Short time relaxation of a driven elastic string in a random medium (2007)
Kolton, Alejandro B., Rosso, Alberto, Albano, Ezequiel V., Giamarchi, Thierry
We study numerically the relaxation of a driven elastic string in a two dimensional pinning landscape. The relaxation of the string, initially flat, is governed by a growing length $L(t)$ separating...
Non-equilibrium relaxation of an elastic string in random media (2006)
Kolton, Alejandro B., Rosso, A., Giamarchi, Thierry
We study the relaxation of an elastic string in a two dimensional pinning landscape using Langevin dynamics simulations. The relaxation of a line, initially flat, is characterized by a growing...
Transverse rectification of disorder-induced fluctuations in a driven system (2006)
We study numerically the overdamped motion of particles driven in a two dimensional ratchet potential. In the proposed design, of the so-called geometrical-ratchet type, the mean velocity of a single...
Nonequilibrium structures and dynamic transitions in driven vortex lattices with disorder (2006)
Kolton, Alejandro B., Domínguez, Daniel
We review our studies of elastic lattices driven by an external force $F$ in the presence of random disorder, which correspond to the case of vortices in superconducting thin films driven by external...
Short time relaxation of a driven elastic string in a random medium (2006)
Kolton, Alejandro B., Rosso, Alberto, Albano, Ezequiel V., Giamarchi, Thierry
We study numerically the relaxation of a driven elastic string in a two dimensional pinning landscape. The relaxation of the string, initially flat, is governed by a growing length $L(t)$ separating...
Dynamics below the depinning threshold (2006)
Kolton, Alejandro B., Rosso, Alberto, Giamarchi, Thierry, Krauth, Werner
We study the steady-state low-temperature dynamics of an elastic line in a disordered medium below the depinning threshold. Analogously to the equilibrium dynamics, in the limit T->0, the steady...
Non-equilibrium relaxation of an elastic string in random media (2006)
Kolton, Alejandro B., Rosso, A., Giamarchi, Thierry
We study the relaxation of an elastic string in a two dimensional pinning landscape using Langevin dynamics simulations. The relaxation of a line, initially flat, is characterized by a growing...
Non-equilibrium relaxation of an elastic string in random media (2006)
Kolton, Alejandro B., Rosso, A., Giamarchi, Thierry
We study the relaxation of an elastic string in a two dimensional pinning landscape using Langevin dynamics simulations. The relaxation of a line, initially flat, is characterized by a growing...
Pinning Induced Fluctuations on Driven Vortices (2005)
We use a simple model to study the long time fluctuations induced by random pinning on the motion of driven non--interacting vortices. We find that vortex motion seen from the co--moving frame is...
Non-equilibrium relaxation of an elastic string in random media (2005)
Kolton, Alejandro B., Rosso, A., Giamarchi, Thierry
We study the relaxation of an elastic string in a two dimensional pinning landscape using Langevin dynamics simulations. The relaxation of a line, initially flat, is characterized by a growing...
Creep motion of an elastic string in a random potential (2004)
Kolton, Alejandro B., Rosso, Alberto, Giamarchi, Thierry
We study the creep motion of an elastic string in a two dimensional pinning landscape by Langevin dynamics simulations. We find that the Velocity-Force characteristics are well described by the creep...
Heterogeneous dynamics of the three dimensional Coulomb glass out of equilibrium (2004)
Kolton, Alejandro B., Grempel, D. R., Dominguez, Daniel
The non-equilibrium relaxational properties of a three dimensional Coulomb glass model are investigated by kinetic Monte Carlo simulations. Our results suggest a transition from stationary to...
Effective temperature in driven vortex lattices with random pinning (2002)
Kolton, Alejandro B., Exartier, Raphael, Cugliandolo, Leticia, Dominguez, Daniel, Gronbech-Jensen, Niels
We study numerically correlation and response functions in non-equilibrium driven vortex lattices with random pinning. From a generalized fluctuation-dissipation relation we calculate an effective...
Mode-locking in driven vortex lattices with transverse ac-drive and random pinning (2001)
Kolton, Alejandro B., Dominguez, Daniel, Gronbech-Jensen, Niels
We find mode-locking steps in simulated current-voltage characteristics of driven vortex lattices with {\it random} pinning when an applied ac-current is {\it perpendicular} to the dc-current. For...
Phase-locking of driven vortex lattices with transverse ac-force and periodic pinning (2001)
Reichhardt, Charles, Kolton, Alejandro B., Dominguez, Daniel, Gronbech-Jensen, Niels
For a vortex lattice moving in a periodic array we show analytically and numerically that a new type of phase locking occurs in the presence of a longitudinal dc driving force and a transverse ac...
Mode Locking in ac-Driven Vortex Lattices with Random Pinning (2001)
Domínguez, Daniel, Grønbech-Jensen, Niels, Kolton, Alejandro B.
Mode-locking in ac-driven vortex lattices with random pinning (2000)
Kolton, Alejandro B., Dominguez, Daniel, Gronbech-Jensen, Niels
We find mode-locking steps in simulated current-voltage characteristics of ac-driven vortex lattices with {\it random} pinning. For low frequencies there is mode-locking above a finite ac force...
Dynamical ordering in the c-axis in 3D driven vortex lattices (2000)
Kolton, Alejandro B., Dominguez, Daniel, Gronbech-Jensen, Niels
We present molecular dynamics simulations of driven vortices in layered superconductors in the presence of an external homogeneous force and point disorder. We use a model introduced by J.R.Clem for...
Hall noise and transverse freezing in driven vortex lattices (1999)
Kolton, Alejandro B., Dominguez, Daniel, Gronbech-Jensen, Niels
We study driven vortices lattices in superconducting thin films. Above the critical force $F_c$ we find two dynamical phase transitions at $F_p$ and $F_t$, which could be observed in simultaneous...