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

W-C superconducting nanostructures have been grown by He⁺ - Focused Ion Beam Induced Deposition (He⁺-FIBID), which allows superb lateral resolution as well as the capability for creating three-dimensional nanostructures. First, results on in-plane W-C superconducting nanowires grown by He⁺-FIBID will be presented, where the long-range vortex transport has been investigated by means of non-local measurements; and we will compare them with previous research on in-plane nanostructures grown by Ga⁺-FIBID [1]. Secondly, results on the growth and superconducting properties of out-of-plane nanotubes with well-controlled inner and outer diameter grown by He⁺-FIBID will be shown [2]. Lastly, results on the growth and superconducting properties of nanohelices grown by He⁺-FIBID with tailored dimensions will be presented. Here, remarkable vortex and phase-slip phenomena have been found and explained by the corresponding numerical simulations [3]. In summary, a better understanding of nano-superconductivity is expected to occur in W-C nanostructures grown by the He⁺-FIBID technique.

[1] Córdoba R. et al., Nature Communications 4, 3944 (2013); Córdoba R. et al., Scientific Reports 9, 12386 (2019).
[2] Córdoba R. et al., Nano Letters 18, 1379 (2018)
[3] Córdoba R. et al., manuscript submitted.