1996/04/02 by Daniel Dominguez, Daniel Domínguez
Physics and Astronomy · #Current (fluid) #Flow (mathematics) #Flux (metallurgy) #Frustration #Josephson effect #Magnetic flux #Nonlinear Photonic Systems #Physics of Superconductivity and Magnetism #Quantum and electron transport phenomena #Tourbillon #Vortex #cond-mat
paper · pdf · doi:10.1016/0921-4526(96)00208-6
9 pages. 3 Figures available upon request. Presented in the Workshop on Josephson Junction Arrays, ICTP (August 1995). To appear in Physica B (1996)
arxiv created 1996/04/02 · openalex publication_date 1996/06/01 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28
We study the dynamics of Josephson junction arrays with positional disorder and driven by an external current. We consider weak magnetic fields, corresponding to a frustration f=n+1/25 with n integer. We find that above the critical current ic there is a plastic flow of vortices, where most of the vortices are pinned and only a few vortices flow through channels. This dynamical regime is characterized by strong fluctuations of the total vorticity. The number of the flow channels grow with increasing bias current. At larger currents there is a dynamical regime characterized by the homogeneous motion of all the vortices, i.e. a flux flow regime. We find a dynamical phase transition between the plastic flow and the flux flow regimes when analyzing voltage-voltage correlation functions.