Vortex states in mesoscopic superconductors with a complex geometry: A finite element analysis.

The time-dependent Ginzburg-Landau equations have been solved numerically by a finite-element analysis for a mesoscopic superconducting square structure with four nanoscale holes in two-dimensional space. For given applied magnetic fields we have simulated the dynamical behavior of the penetrating magnetic vortices into the superconductor. Our results show that the mesoscopic superconductor can be tuned to exhibit the clear separation of the multivortex by properly introducing the nanoscale holes in a mesoscopic superconductor. [ABSTRACT FROM AUTHOR]