Flux-periodic supercurrent oscillations in an Aharonov-Bohm-type nanowire Josephson junction
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arXiv
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| Autores principales: | , , , , , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866909115246182400 |
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| author | Zellekens, Patrick Deacon, Russell S. Basaric, Farah Juluri, Raghavendra Randle, Michael D. Bennemann, Benjamin Krause, Christoph Zimmermann, Erik Sanchez, Ana M. Grützmacher, Detlev Pawlis, Alexander Ishibashi, Koji Schäpers, Thomas |
| author_facet | Zellekens, Patrick Deacon, Russell S. Basaric, Farah Juluri, Raghavendra Randle, Michael D. Bennemann, Benjamin Krause, Christoph Zimmermann, Erik Sanchez, Ana M. Grützmacher, Detlev Pawlis, Alexander Ishibashi, Koji Schäpers, Thomas |
| contents | Phase winding effects in hollow semiconductor nanowires with superconducting shells have been proposed as a route to engineer topological superconducting states. We investigate GaAs/InAs core/shell nanowires with half-shells of epitaxial aluminium as a potential platform for such devices, where the thin InAs shell confines the electron wave function around the GaAs core. With normal contacts we observed pronounced $h/e$ flux periodic oscillations in the magnetoconductance, indicating the presence of a tubular conductive channel in the InAs shell. Conversely, the switching current in Josephson junctions oscillates with approximately half that period, i.e. $h/2e$, indicating transport via Andreev transport processes in the junction enclosing threading magnetic flux. On these structures, we systematically studied the gate-, field-, and temperature-dependent evolution of the supercurrent. Results indicate that Andreev transport processes can occur about the wire circumference indicating full proximitization of the InAs shell from the half-shell superconducting contacts. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_13880 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Flux-periodic supercurrent oscillations in an Aharonov-Bohm-type nanowire Josephson junction Zellekens, Patrick Deacon, Russell S. Basaric, Farah Juluri, Raghavendra Randle, Michael D. Bennemann, Benjamin Krause, Christoph Zimmermann, Erik Sanchez, Ana M. Grützmacher, Detlev Pawlis, Alexander Ishibashi, Koji Schäpers, Thomas Mesoscale and Nanoscale Physics Superconductivity Phase winding effects in hollow semiconductor nanowires with superconducting shells have been proposed as a route to engineer topological superconducting states. We investigate GaAs/InAs core/shell nanowires with half-shells of epitaxial aluminium as a potential platform for such devices, where the thin InAs shell confines the electron wave function around the GaAs core. With normal contacts we observed pronounced $h/e$ flux periodic oscillations in the magnetoconductance, indicating the presence of a tubular conductive channel in the InAs shell. Conversely, the switching current in Josephson junctions oscillates with approximately half that period, i.e. $h/2e$, indicating transport via Andreev transport processes in the junction enclosing threading magnetic flux. On these structures, we systematically studied the gate-, field-, and temperature-dependent evolution of the supercurrent. Results indicate that Andreev transport processes can occur about the wire circumference indicating full proximitization of the InAs shell from the half-shell superconducting contacts. |
| title | Flux-periodic supercurrent oscillations in an Aharonov-Bohm-type nanowire Josephson junction |
| topic | Mesoscale and Nanoscale Physics Superconductivity |
| url | https://arxiv.org/abs/2402.13880 |