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Unveiling the Current-Phase Relationship of InSb Nanoflag Josephson Junctions Using a NanoSQUID Magnetometer

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Název: Unveiling the Current-Phase Relationship of InSb Nanoflag Josephson Junctions Using a NanoSQUID Magnetometer
Autoři: Andrea Chieppa, Gaurav Shukla, Simone Traverso, Giada Bucci, Valentina Zannier, Samuele Fracassi, Niccolo Traverso Ziani, Maura Sassetti, Matteo Carrega, Fabio Beltram, Francesco Giazotto, Lucia Sorba, Stefan Heun
Rok vydání: 2025
Témata: Biophysics, Neuroscience, Space Science, Biological Sciences not elsewhere classified, Chemical Sciences not elsewhere classified, Physical Sciences not elsewhere classified, Information Systems not elsewhere classified, showing significant contributions, measuring interference patterns, magnetic field response, extract unprecedented details, asymmetric squid configurations, junctions ’ cprs, magnetic flux noise, hybrid junctions, wide range, well reproduced, voltage sensitivity, superconducting electronics, results demonstrate, recently emerged, phase relationship, observed features, numerical simulations, nanoscale magnetometry, letter presents, intriguing platform, insb nanoflags, higher harmonics, devices across
Popis: Planar Josephson junctions (JJs) based on InSb nanoflags have recently emerged as an intriguing platform in superconducting electronics. The knowledge of the current-phase relationship (CPR) of such hybrid junctions is crucial for their applications. This letter presents the fabrication and investigation of superconducting quantum interference devices (SQUIDs) employing InSb nanoflag JJs. The observed features are well reproduced through numerical simulations. By measuring interference patterns in both symmetric and asymmetric SQUID configurations, we extract unprecedented details of the junctions’ CPRs. Our results demonstrate the skewness of the CPR, showing significant contributions from higher harmonics. We explore the magnetic field response of the devices across a wide range of fields (±30 mT). Finally, we assess the flux-to-voltage sensitivity of the SQUIDs to evaluate their performance as magnetometers, identifying a magnetic flux noise of SΦ1/2=4.4×10−6⁡Φ0/√Hz. These results showcase potential applications in nanoscale magnetometry.
Druh dokumentu: article in journal/newspaper
Jazyk: unknown
DOI: 10.1021/acs.nanolett.5c03765.s001
Dostupnost: https://doi.org/10.1021/acs.nanolett.5c03765.s001
https://figshare.com/articles/journal_contribution/Unveiling_the_Current-Phase_Relationship_of_InSb_Nanoflag_Josephson_Junctions_Using_a_NanoSQUID_Magnetometer/30094243
Rights: CC BY-NC 4.0
Přístupové číslo: edsbas.73E5E627
Databáze: BASE
Popis
Abstrakt:Planar Josephson junctions (JJs) based on InSb nanoflags have recently emerged as an intriguing platform in superconducting electronics. The knowledge of the current-phase relationship (CPR) of such hybrid junctions is crucial for their applications. This letter presents the fabrication and investigation of superconducting quantum interference devices (SQUIDs) employing InSb nanoflag JJs. The observed features are well reproduced through numerical simulations. By measuring interference patterns in both symmetric and asymmetric SQUID configurations, we extract unprecedented details of the junctions’ CPRs. Our results demonstrate the skewness of the CPR, showing significant contributions from higher harmonics. We explore the magnetic field response of the devices across a wide range of fields (±30 mT). Finally, we assess the flux-to-voltage sensitivity of the SQUIDs to evaluate their performance as magnetometers, identifying a magnetic flux noise of SΦ1/2=4.4×10−6⁡Φ0/√Hz. These results showcase potential applications in nanoscale magnetometry.
DOI:10.1021/acs.nanolett.5c03765.s001