Direct-writing of complex 3D nano-superconductors

ORAL

Abstract

Innovative schemes have taken advantage of the third dimension (3D) for the development of advanced electronic components. Thus, 3D nano-superconductors could be implemented in the next generation of energy efficient electronic devices. Here, we introduce a template-free nano-lithography method to fabricate in a single-step 3D nano-superconductors with arbitrary geometry. They become superconducting at 7 K and show large critical magnetic field and critical current density. Particularly, we have prepared 3D superconducting WC hollow nanowires by decomposing tungsten hexacarbonyl molecules with a highly-focused He+ ion beam, with outer diameters down to 32 nm and inner ones down to 6 nm [1, 2]. In addition, we have grown nanohelices with on-demand geometries, with dimensions down to 100 nm in diameter, and aspect ratio up to 65. 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 [3].

[1] R. Córdoba et al., Nano Lett. 2018, 18, 2, 1379–1386.
[2] R. Córdoba et al., Beilstein J. Nanotechnol. 2020, 11, 1198–1206.
[3] R. Córdoba et al., Nano Lett. 2019, 19, 12, 8597–8604.

*EU-H2020, grant agreement No 654360 NFFA-Europe.

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Presenters

  • Rosa Córdoba

    • Institute of Molecular Science (ICMol), University of Valencia, E-46980 Paterna, Spain

Authors

  • Rosa Córdoba

    • Institute of Molecular Science (ICMol), University of Valencia, E-46980 Paterna, Spain

  • Dominique Mailly

    • Centre de Nanosciences et de Nanotechnologies, CNRS-Université Paris Saclay, 91120 Palaiseau, France

  • Alfonso Ibarra

    • University of Zaragoza, INA, LMA, E-50009 Zaragoza, Spain

  • R. O. Rezaev

    • Institute for Integrative Nanosciences, Leibniz IFW Dresden, D-01069 Dresden, Germany
    • IIN, Leibniz IFW Dresden, Germany; Tomsk Polytechnic University, Tomsk, Russia

  • E. Smirnova

    • Institute for Integrative Nanosciences, Leibniz IFW Dresden, D-01069 Dresden, Germany

  • O. G. Schmidt

    • Institute for Integrative Nanosciences, Leibniz IFW Dresden, D-01069 Dresden, Germany
    • IIN, Leibniz IFW Dresden, Germany; MSN, TU Chemnitz, Germany

  • V. M. Fomin

    • Institute for Integrative Nanosciences, Leibniz IFW Dresden, D-01069 Dresden, Germany
    • IIN, Leibniz IFW Dresden, Germany; NRN University MEPhI, Moscow, Russia

  • Uli Zeitler

    • High Field Magnet Laboratory (HFML-EFML), Radboud University, Nijmegen, 6525 ED Nijmegen, The Netherlands

  • Isabel Guillamon

    • Universidad Autónoma de Madrid, E-28049, Madrid, Spain

  • Hermann Suderow

    • Universidad Autónoma de Madrid, E-28049, Madrid, Spain

  • JOSE MARIA DE TERESA NOGUERAS

    • Instituto de Nanociencia y Materiales de Aragón (INMA), CSIC-University of Zaragoza, Spain
    • Instituto de Nanociencia y Materiales de Aragón, INMA, CSIC-University of Zaragoza, Spain
    • Instituto de Nanociencia y Materiales de Aragón, INMA (CSIC-University of Zaragoza, Spain)