Superconducting Quantum Interference Devices based on InSb nanoflag Josephson junctions
Fuente:
arXiv
Gespeichert in:
| Hauptverfasser: | , , , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Veröffentlicht: |
2025
|
| Schlagworte: | |
| Online-Zugang: | |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| _version_ | 1866918164898512896 |
|---|---|
| author | Chieppa, Andrea Shukla, Gaurav Traverso, Simone Bucci, Giada Zannier, Valentina Fracassi, Samuele Ziani, Niccolo Traverso Sassetti, Maura Carrega, Matteo Beltram, Fabio Giazotto, Francesco Sorba, Lucia Heun, Stefan |
| author_facet | Chieppa, Andrea Shukla, Gaurav Traverso, Simone Bucci, Giada Zannier, Valentina Fracassi, Samuele Ziani, Niccolo Traverso Sassetti, Maura Carrega, Matteo Beltram, Fabio Giazotto, Francesco Sorba, Lucia Heun, Stefan |
| contents | Planar Josephson junctions (JJs) based on InSb nanoflags have recently emerged as an intriguing platform in superconducting electronics. This letter presents the fabrication and investigation of superconducting quantum interference devices (SQUIDs) employing InSb nanoflag JJs. We provide measurements of interference patterns in both symmetric and asymmetric geometries. The interference patterns in both configurations can be modulated by a back-gate voltage, a feature well reproduced through numerical simulations. The observed behavior aligns with the skewed current-phase relations of the JJs, demonstrating significant contributions from higher harmonics. We explore the magnetic field response of the devices across a wide range of fields ($\pm 30$ mT), up to the single-junction interference regime, where a Fraunhofer-like pattern is detected. Finally, we assess the flux-to-voltage sensitivity of the SQUIDs to evaluate their performance as magnetometers. A magnetic flux noise of $S^{1/2}_Φ= 4.4 \times 10^{-6} Φ_0 / \sqrt{Hz}$ is identified, indicating potential applications in nanoscale magnetometry. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_18965 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Superconducting Quantum Interference Devices based on InSb nanoflag Josephson junctions Chieppa, Andrea Shukla, Gaurav Traverso, Simone Bucci, Giada Zannier, Valentina Fracassi, Samuele Ziani, Niccolo Traverso Sassetti, Maura Carrega, Matteo Beltram, Fabio Giazotto, Francesco Sorba, Lucia Heun, Stefan Mesoscale and Nanoscale Physics Applied Physics Quantum Physics Planar Josephson junctions (JJs) based on InSb nanoflags have recently emerged as an intriguing platform in superconducting electronics. This letter presents the fabrication and investigation of superconducting quantum interference devices (SQUIDs) employing InSb nanoflag JJs. We provide measurements of interference patterns in both symmetric and asymmetric geometries. The interference patterns in both configurations can be modulated by a back-gate voltage, a feature well reproduced through numerical simulations. The observed behavior aligns with the skewed current-phase relations of the JJs, demonstrating significant contributions from higher harmonics. We explore the magnetic field response of the devices across a wide range of fields ($\pm 30$ mT), up to the single-junction interference regime, where a Fraunhofer-like pattern is detected. Finally, we assess the flux-to-voltage sensitivity of the SQUIDs to evaluate their performance as magnetometers. A magnetic flux noise of $S^{1/2}_Φ= 4.4 \times 10^{-6} Φ_0 / \sqrt{Hz}$ is identified, indicating potential applications in nanoscale magnetometry. |
| title | Superconducting Quantum Interference Devices based on InSb nanoflag Josephson junctions |
| topic | Mesoscale and Nanoscale Physics Applied Physics Quantum Physics |
| url | https://arxiv.org/abs/2504.18965 |