Berlin 2024 – wissenschaftliches Programm
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SYMS: Symposium Three-Dimensional Nanostructures: From Magnetism to Superconductivity
SYMS 1: Three-Dimensional Nanostructures: From Magnetism to Superconductivity
SYMS 1.4: Hauptvortrag
Montag, 18. März 2024, 11:15–11:45, H 0105
Study of 3D superconducting nanoarchitectures — •Rosa Córdoba — University of Valencia, Valencia, Spain
Innovative approaches exploit the 3D to propel electronic component development, paving the way for advancements in material science, physics, and nanotechnology. Consequently, the potential integration of 3D nano-superconductors into future highly efficient electronic elements is promising, despite existing challenges in their fabrication and characterization. This contribution introduces a direct-write additive manufacturing technique for precise fabrication of advanced 3D nano-superconductors. Notably, we have successfully produced 3D superconducting hollow nanocylinders and nanohelices with customizable geometries, achieving controllable inner and outer diameters as small as 32 nm. These nanostructures exhibit superconductivity at 7 K, demonstrating substantial critical magnetic field and critical current density. Remarkably, the nanohelices manifest superconductivity up to 15 T, contingent upon the magnetic field's orientation relative to the nanohelix axis. This observation underscores the significant influence of helical 3D geometry and orientation in a magnetic field during the superconducting phase transition. Furthermore, experimental findings, supported by numerical simulations based on the time-dependent Ginzburg-Landau equation, reveal distinct vortex and phase-slip patterns. Additionally, our work includes experimental modulation of electric field-induced superconductivity in nanowires, with theoretical explanations grounded in the Ginzburg-Landau theory.
Keywords: Vortex dynamics; Topological effect; Nanosuperconductivity; Nanofabrication; Three dimensions