Disordered vortex matter out of equilibrium: a Langevin molecular dynamics study
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Assi, H., Chaturvedi, H., Dobramysl, U., Pleimling, M., & Täuber, U. (2016). Disordered vortex matter out of equilibrium: a Langevin molecular dynamics study. Molecular Simulation, 42 (16), 1401-1409. https://doi.org/10.1080/08927022.2015.1119826
© 2016 Informa UK Limited, trading as Taylor & Francis Group. We discuss the use of Langevin molecular dynamics in the investigation of the non-equilibrium properties of disordered vortex matter. Our special focus is set on values of system parameters that are realistic for disordered high- (Formula presented.) superconductors such as YBCO. Using a discretised elastic line model, we study different aspects of vortices far from thermal equilibrium. On the one hand, we investigate steady-state properties of driven magnetic flux lines in a disordered environment, namely the current–voltage characteristics, the gyration radius and the pinning time statistics. On the other hand, we study the complex relaxation processes and glassy-like dynamics that emerge in type-II superconductors due to the intricate competition between the long-range vortex–vortex repulsion and flux pinning due to randomly placed point defects. To this end, we consider different types of sudden perturbations: temperature, magnetic field and external current quenches.
External DOI: https://doi.org/10.1080/08927022.2015.1119826
This record's URL: https://www.repository.cam.ac.uk/handle/1810/269379