Superconducting Nanostructures Grown by Ga⁺- and He⁺- Focused Ion Beam Induced Deposition (FIBID)

Since the discovery of superconductivity in W-C deposits grown by Ga⁺ - Focused Ion Beam Induced Deposition (FIBID) [1], this material has been used as a model system to investigate the interplay of the vortex lattice with geometrical restrictions [2] or with periodic thickness modulations [3, 4].
We have recently carried out experiments for the investigation of non-local transport of vortices in Ga⁺ - FIBID nanowires [5]. These experiments indicate that long-distance (at least ten microns) propagation of vortices is sustained in such nanowires, with application in information technologies.
On the other hand, the limitations in resolution observed in Ga⁺ - FIBID nanostructures are overcome by the use of He⁺ - FIBID [6]. Results will be shown that highlight the potential of He⁺ - FIBID for the growth of superconducting nanowires and nanotubes with superb resolution. Applications of such nanostructures will be discussed.

References:
[1] Sadki E. et al., Applied Physics Letters 85, 6206 (2004).
[2] Córdoba R. et al., Nature Communications 4, 3944 (2013).
[3] Guillamón I. et al., Nature Physics 10, 851 (2014).
[4] García-Serrano I. et al., Beilstein Journal of Nanotechnology 7, 1698 (2016).
[5] Córdoba R. et al., manuscript in preparation.
[6] Córdoba R. et al., Nano Letters 18, 1379 (2018).