Presentation Information
[PCP2-08]Numerical Study on Geometry Dependence of Vortex States in Two-Dimensional Type-II Mesoscopic Superconductors
*Hao Yu1, Haoyun Liang1, Masahiko Hayashi2, Akinobu Kanda1 (1. Department of Physics, University of Tsukuba (Japan), 2. Faculty of Education and Human Studies, Akita University (Japan))
Keywords:
Mesoscopic Superconductor,Vortex Configurations,Numerical Study
[Purpose]
In mesoscopic superconductors with dimensions comparable to the superconducting coherence length (x0), vortex configurations are strongly influenced by sample boundaries, leading to diverse states such as the multivortex state (MVS) and giant vortex state (GVS). These states hold promise for quantum technologies like cellular automata and non-volatile memory. This study aims to investigate the dependence of vortex configurations on the geometry of mesoscopic superconductors.
[Method]
We investigates detailed dependence of vortex states on superconductor geometry numerically using the Superconga framework to solve the quasi-classical Eilenberger equations.[1] We computed the magnetic field evolution of vortex states for disk-, square-, and trapezoid-shaped samples of identical area (100 ξ02).
[Results]
Key findings are: (1) Vortex arrangements exhibit a pronounced geometric dependence; (2) While the lowest-energy state is predominantly achieved during vortex entry/exit, exceptions occur; (3) Highly symmetric geometries facilitate the simultaneous entry of multiple vortices.
[Consideration]
Our presentation details these results and elucidates the underlying physical mechanisms governing vortex configuration in geometrically confined superconductors, relevant for designing vortex-based quantum devices.
[1] P. Halmvall et al., Appl. Phys. Rev. 10, 011317 (2023)
In mesoscopic superconductors with dimensions comparable to the superconducting coherence length (x0), vortex configurations are strongly influenced by sample boundaries, leading to diverse states such as the multivortex state (MVS) and giant vortex state (GVS). These states hold promise for quantum technologies like cellular automata and non-volatile memory. This study aims to investigate the dependence of vortex configurations on the geometry of mesoscopic superconductors.
[Method]
We investigates detailed dependence of vortex states on superconductor geometry numerically using the Superconga framework to solve the quasi-classical Eilenberger equations.[1] We computed the magnetic field evolution of vortex states for disk-, square-, and trapezoid-shaped samples of identical area (100 ξ02).
[Results]
Key findings are: (1) Vortex arrangements exhibit a pronounced geometric dependence; (2) While the lowest-energy state is predominantly achieved during vortex entry/exit, exceptions occur; (3) Highly symmetric geometries facilitate the simultaneous entry of multiple vortices.
[Consideration]
Our presentation details these results and elucidates the underlying physical mechanisms governing vortex configuration in geometrically confined superconductors, relevant for designing vortex-based quantum devices.
[1] P. Halmvall et al., Appl. Phys. Rev. 10, 011317 (2023)