Year: 2003
Type: article
Abstract: We solve the Ginzburg-Landau equation for the mesoscopic superconducting thin film of square shape in a magnetic field for a wide range of Ginzburg-Landau parameters $0.05<{\ensuremath{\kappa}}_{\mathit{eff}}<\ensuremath{\infty}.$ We focus on the region of the field where the formation of an antivortex has been reported previously. We found that the phase with the antivortex exists in the broad range of parameters. When the coherence length decreases the topological phase transition to the phase with the same total vorticity and a reduced symmetry takes place. The giant vortex with vorticity $m=3$ is found to be unstable for any field, $\ensuremath{\xi}/a$ and ${\ensuremath{\kappa}}_{\mathit{eff}}\ensuremath{\gtrsim}0.1.$ Reduction of ${\ensuremath{\kappa}}_{\mathit{eff}}$ does not make the phase with antivortex more stable contrary to the case of a cylindric sample of the type-I superconductor.
Authors: T. Mertelj, V. V. Kabanov
Institutions: University of Ljubljana, Jožef Stefan Institute
Language: English
Subfield: Condensed Matter Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2093083097