Superconducting bistability in floating Al islands of hybrid Al/InAs nanowires
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866916987568914432 |
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| author | Shpagina, E. V. Tikhonov, E. S. Ruhstorfer, D. Koblmueller, G. Khrapai, V. S. |
| author_facet | Shpagina, E. V. Tikhonov, E. S. Ruhstorfer, D. Koblmueller, G. Khrapai, V. S. |
| contents | We investigate a non-equilibrium aspect of the current-driven superconducting-normal phase transition in floating Al islands of epitaxial full-shell Al/InAs nanowires. Within a transition region discontinuous voltage jumps and hysteretic behaviour of the I-V characteristics are observed, associated with the destruction and recovery of the superconducting order parameter in the island. The strength of the two features varies strongly in different devices in a mutually correlated way and can be suppressed by a small magnetic field. Numerical calculation explains this behaviour in terms of a tiny non-equilibrium correction to the electronic energy distribution at low energies. The experiment demonstrates a critical failure of a two-temperature non-equilibrium model of the superconductor-normal transition in floating islands of hybrid nanowire devices. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_20408 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Superconducting bistability in floating Al islands of hybrid Al/InAs nanowires Shpagina, E. V. Tikhonov, E. S. Ruhstorfer, D. Koblmueller, G. Khrapai, V. S. Mesoscale and Nanoscale Physics Superconductivity We investigate a non-equilibrium aspect of the current-driven superconducting-normal phase transition in floating Al islands of epitaxial full-shell Al/InAs nanowires. Within a transition region discontinuous voltage jumps and hysteretic behaviour of the I-V characteristics are observed, associated with the destruction and recovery of the superconducting order parameter in the island. The strength of the two features varies strongly in different devices in a mutually correlated way and can be suppressed by a small magnetic field. Numerical calculation explains this behaviour in terms of a tiny non-equilibrium correction to the electronic energy distribution at low energies. The experiment demonstrates a critical failure of a two-temperature non-equilibrium model of the superconductor-normal transition in floating islands of hybrid nanowire devices. |
| title | Superconducting bistability in floating Al islands of hybrid Al/InAs nanowires |
| topic | Mesoscale and Nanoscale Physics Superconductivity |
| url | https://arxiv.org/abs/2506.20408 |