Volume 75, Number 6, September 2006
|Page(s)||936 - 942|
|Section||Condensed matter: electronic structure, electrical, magnetic, and optical properties|
|Published online||09 August 2006|
Vortex states inside the superconducting phase of a thin microtriangle
INPAC-Institute for Nanoscale Physics and Chemistry, KU Leuven Nanoscale Superconductivity and Magnetism Group Celestijnenlaan 200 D, 3001 Leuven, Belgium
2 Laboratorio de Baixas Temperaturas e Superconductividade Departamento de Física da Materia Condensada, Universidade de Santiago de Compostela - 15782 Santiago de Compostela, Spain
3 INPAC-Institute for Nanoscale Physics and Chemistry, KU Leuven Quantum Chemistry Group - Celestijnenlaan 200 F, 3001 Leuven, Belgium
Corresponding author: email@example.com
Accepted: 20 July 2006
By combining the non-linear Ginzburg-Landau equations with a gauge transformation of the vector potential that accounts for the superconducting/vacuum boundary condition, the superconducting phase of a thin microtriangle under a perpendicular magnetic field is investigated. We determine the symmetry-breaking and symmetry-switching transitions that the nucleated order parameter may undergo when decreasing the temperature well below the phase boundary. It is shown that symmetry consistent vortex-antivortex patterns are stable in a broad range of temperatures and magnetic fields. The geometry of the sample also induces crossovers between vortex states unexpected for other regular polygons.
PACS: 74.20.De – Phenomenological theories (two fluid, Ginzburg-Landau, etc.) / 74.78.Na – Mesoscopic and nanoscale systems / 74.25.Ha – Magnetic properties
© EDP Sciences, 2006
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