期刊
NANO LETTERS
卷 19, 期 12, 页码 8597-8604出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.9b03153
关键词
Helium ion microscope; three-dimensional nanoprinting; focused-ion-beam-induced deposition; nanosuperconductors; phase slips; Ginzburg-Landau equation
类别
资金
- Spanish Ministry of Economy and Competitiveness [MAT2017-82970-C2-2-R, PIE201760E027]
- FEDER [FIS2017-84330-R, MDM-2014-0377]
- EU ERC [679080]
- COST [CA16128]
- STSM [41199]
- COST Action [CA16218]
- EU-H2020 research and innovation programme [654360]
- regional Gobierno de Aragon [E13_17R]
- European Social Fund (Construyendo Europa desde Aragon)
- Comunidad de Madrid through project Nanofrontmag-CM [S2013/MIT-2850]
- German Research Foundation (DFG) [FO 956/5-1]
- HFML-RU/NWO-I, member of the European Magnetic Field Laboratory (EMFL)
- Netherlands Organisation for Scientific Research (NWO) [132]
- European Research Council (ERC) [679080] Funding Source: European Research Council (ERC)
Novel schemes based on the design of complex three-dimensional (3D) nanoscale architectures are required for the development of the next generation of advanced electronic components. He focused-ion-beam (FIB) microscopy in combination with a precursor gas allows one to fabricate 3D nanostructures with an extreme resolution and a considerably higher aspect ratio than FIB-based methods, such as Ga+ FIB-induced deposition, or other additive manufacturing technologies. In this work, we report the fabrication of 3D tungsten carbide nanohelices with on-demand geometries via controlling key deposition parameters. Our results show the smallest and highest-densely packed nanohelix ever fabricated so far, with dimensions of 100 nm in diameter and aspect ratio up to 65. These nanohelices become superconducting at 7 K and show a large critical magnetic field and critical current density. In addition, given its helical 3D geometry, fingerprints of vortex and phase-slip patterns are experimentally identified and supported by numerical simulations based on the time-dependent Ginzburg-Landau equation. These results can be understood by the helical geometry that induces specific superconducting properties and paves the way for future electronic components, such as sensors, energy storage elements, and nanoantennas, based on 3D compact nanosuperconductors.
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