Supercurrent modulation in InSb nanoflag-based Josephson junctions by scanning gate microscopy
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arXiv
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| Main Authors: | , , , , , , , , , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866911295792480256 |
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| author | Lombardi, Antonio Shukla, Gaurav Bucci, Giada Salimian, Sedighe Zannier, Valentina Traverso, Simone Fracassi, Samuele Ziani, Niccolo Traverso Sassetti, Maura Carrega, Matteo Beltram, Fabio Sorba, Lucia Heun, Stefan |
| author_facet | Lombardi, Antonio Shukla, Gaurav Bucci, Giada Salimian, Sedighe Zannier, Valentina Traverso, Simone Fracassi, Samuele Ziani, Niccolo Traverso Sassetti, Maura Carrega, Matteo Beltram, Fabio Sorba, Lucia Heun, Stefan |
| contents | InSb nanoflags represent an interesting platform for quantum transport and have recently been exploited in the study of hybrid planar Josephson junctions. Due to the uncovered semiconductor surface, they are also good candidates for surface probe techniques. Here, we report the first Scanning Gate Microscopy (SGM) experiments on Nb-contacted InSb nanoflag-based Josephson junctions. In the normal state, sizable conductance modulation via the charged tip of the SGM is recorded. In the superconducting state, we report the first application of Scanning Gate Microscopy to superconducting weak links, demonstrating the possibility of manipulating the supercurrent flow across a semiconductor-superconductor heterostructure at a local level. The experimental findings are consistent with theoretical predictions and establish a new way of investigating the behavior of superconducting weak links, towards the local imaging of supercurrent flow. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_15342 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Supercurrent modulation in InSb nanoflag-based Josephson junctions by scanning gate microscopy Lombardi, Antonio Shukla, Gaurav Bucci, Giada Salimian, Sedighe Zannier, Valentina Traverso, Simone Fracassi, Samuele Ziani, Niccolo Traverso Sassetti, Maura Carrega, Matteo Beltram, Fabio Sorba, Lucia Heun, Stefan Superconductivity Mesoscale and Nanoscale Physics Quantum Physics InSb nanoflags represent an interesting platform for quantum transport and have recently been exploited in the study of hybrid planar Josephson junctions. Due to the uncovered semiconductor surface, they are also good candidates for surface probe techniques. Here, we report the first Scanning Gate Microscopy (SGM) experiments on Nb-contacted InSb nanoflag-based Josephson junctions. In the normal state, sizable conductance modulation via the charged tip of the SGM is recorded. In the superconducting state, we report the first application of Scanning Gate Microscopy to superconducting weak links, demonstrating the possibility of manipulating the supercurrent flow across a semiconductor-superconductor heterostructure at a local level. The experimental findings are consistent with theoretical predictions and establish a new way of investigating the behavior of superconducting weak links, towards the local imaging of supercurrent flow. |
| title | Supercurrent modulation in InSb nanoflag-based Josephson junctions by scanning gate microscopy |
| topic | Superconductivity Mesoscale and Nanoscale Physics Quantum Physics |
| url | https://arxiv.org/abs/2506.15342 |