1.Departement Fysica,Universiteit Antwerpen,Antwerpen,Belgium;2.Departamento de Física,Universidade Federal Rural de Pernambuco,Recife,Brazil;3.Universidade Federal do Rio de Janeiro,Rio de Janeiro,Brazil
Abstract:
Static and dynamic properties of superconducting vortices in a superconducting stripe with a periodic array of weakly-superconducting
(or normal metal) regions are studied in the presence of external magnetic and electric fields. The time-dependent Ginzburg-Landau
theory is used to describe the electronic transport, where the anisotropy is included through the spatially-dependent critical
temperature Tc. Superconducting vortices penetrating into the weak-superconducting region with smaller Tc are more mobile than the ones in the strong superconducting regions. We observe periodic entrance and exit of vortices which
reside in the weak link for some short interval. The mobility of the weakly-pinned vortices can be reduced by increasing the
uniform applied magnetic field leading to distinct features in the voltage vs. magnetic field response of the system.