Buccheri, Vittorio and Joint, François and Amin, Kazi Rafsanjani and Elalaily, Tosson and Kürtössy, Olivér and Scherübl, Zoltán and Fülöp, Gergő and Kanne, Thomas and Nygård, Jesper and Makk, Péter and Csonka, Szabolcs and Gasparinetti, Simone (2025) Microwave dynamics of gated Al/InAs superconducting nanowires. APPLIED PHYSICS LETTERS, 126 (23). No. 232602. ISSN 0003-6951
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Abstract
Several experiments have recently reported on gate-tunable superconducting properties in metallic devices, holding promise for the realization of cryogenic switches, tunable resonators, and superconducting logic. In particular, the suppression of the critical current as a function of the gate voltage has been widely investigated. However, time domain studies are discussed only in a few cases. In this paper, we present a microwave characterization of a gate-controlled Al-capped InAs nanowire embedded in a λ / 4 coplanar waveguide resonator. We observe a shift in the resonator frequency and an increase in its internal losses as a function of the gate voltage, which we relate to a change in the imaginary and real components of the nanowire impedance, respectively. We demonstrate that these changes are described by the Mattis-Bardeen model with an effective temperature. We further study the resonator response to fast-varying gate signals and measure characteristic response times of the order of 40 ns, both in time domain and parametric modulation experiments. Our study elucidates the impact of the gate on the complex impedance of the nanowire in the superconducting state, as well as its dynamic performance, providing a foundation for the design of gate-controlled superconducting devices. © 2025 Author(s).
| Item Type: | Article |
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| Additional Information: | Funding Agency and Grant Number: European Research Council [101041744 ESQuAT]; OTKA; ERC; EIC Pathfinder Challenge QuKiT [101115315]; Janos Bolyai Research Scholarship of the Hungarian Academy of Sciences; Ministry for Culture and Innovation from National Research, Development, and Innovation Fun; Ministry of Culture and Innovation; National Research, Development and Innovation Office within the Quantum Information National Laboratory of Hungary [101041744]; Novo Nordisk Foundation SolidQ; Knut and Alice Wallenberg Foundation via the Wallenberg Centre for Quantum Technology (WACQT); [964398 SuperGate]; [K138433]; [EKOP-24-4-II-BME-95]; [2022-2.1.1-NL-2022-00004] Funding text: The discussed device was partially fabricated in the Chalmers Myfab cleanroom facility. This work was financially supported by the European Research Council via Grant No. 964398 SuperGate, OTKA K138433, ERC project Twistrain, and EIC Pathfinder Challenge QuKiT (No. 101115315). This paper was supported by the Janos Bolyai Research Scholarship of the Hungarian Academy of Sciences and by the EKOP-24-4-II-BME-95 University Research Scholarship Program of the Ministry for Culture and Innovation from the source of the National Research, Development, and Innovation Fun. This research was also supported by the Ministry of Culture and Innovation and the National Research, Development and Innovation Office within the Quantum Information National Laboratory of Hungary (Grant No. 2022-2.1.1-NL-2022-00004), and Novo Nordisk Foundation SolidQ. This work was supported by the Knut and Alice Wallenberg Foundation via the Wallenberg Centre for Quantum Technology (WACQT). S.G. acknowledges financial support from the European Research Council via Grant No. 101041744 ESQuAT. |
| Uncontrolled Keywords: | NANOWIRES; Superconducting nanowire; Time domain; Superconducting properties; InAs; metallic devices; negative resistance; Superconducting resonators; Gate voltages; 'current; Tunables; Domain study; Tunable resonators; |
| Subjects: | Q Science / természettudomány > QC Physics / fizika |
| SWORD Depositor: | MTMT SWORD |
| Depositing User: | MTMT SWORD |
| Date Deposited: | 02 Sep 2025 13:47 |
| Last Modified: | 02 Sep 2025 13:47 |
| URI: | https://real.mtak.hu/id/eprint/223188 |
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