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-Based Nanoscale Superconducting Quantum Interference Devices Tuned by Electroannealing

Collienne, Simon; Raes, Bart; Keijers, Wout; Linek, Julian; Koelle, D.; Kleiner, R.; Kramer, R. B. G.; Vondel, Joris Van de; Silhanek, Alejandro

doi:10.1103/physrevapplied.15.034016

Cited by 11 publications

(7 citation statements)

References 39 publications

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“…where λ 1 and λ 2 are magnetic field penetration depths at temperatures T 1 and T 2 , respectively. Figure 9a shows λ as a function of T calculated according to (3). Experimental data were fitted with the function:…”

Section: Resultsmentioning

confidence: 99%

“…The development of superconducting nanoelectronic devices has remained an important task of studies in recent years. Key elements of the devices are Josephson junctions with tailored properties [1] and elements based on superconducting weak links, such as SQUID [2,3] and quantum interference effect transistors [4]. There is a constant endeavor to improve the properties of superconducting devices: the increase in breakdown current [5] and stability in the air [6], the rise in working temperature [7], and the increase in magnetic field sensibility [8].…”

Section: Introductionmentioning

confidence: 99%

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Size-Dependent Superconducting Properties of In Nanowire Arrays

et al. 2022

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Arrays of superconducting nanowires may be useful as elements of novel nanoelectronic devices. The superconducting properties of nanowires differ significantly from the properties of bulk structures. For instance, different vortex configurations of the magnetic field have previously been predicted for nanowires with different diameters. In the present study, arrays of parallel superconducting In nanowires with the diameters of 45 nm, 200 nm, and 550 nm—the same order of magnitude as coherence length ξ—were fabricated by templated electrodeposition. Values of magnetic moment M of the samples were measured as a function of magnetic field H and temperature T in axial and transverse fields. M(H) curves for the arrays of nanowires with 45 nm and 200 nm diameters are reversible, whereas magnetization curves for the array of nanowires with 550 nm diameter have several feature points and show a significant difference between increasing and decreasing field branches. Critical fields increase with a decrease in diameter, and the thinnest nanowires exceed bulk critical fields by 20 times. The qualitative change indicates that magnetic field configurations are different in the nanowires with different diameters. Variation of M(H) slope in small fields, heat capacity, and the magnetic field penetration depth with the temperature were measured. Superconductivity in In nanowires is proven to exist above the bulk critical temperature.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Size-Dependent Superconducting Properties of In Nanowire Arrays

et al. 2022

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“…We have recently reported the successful implementation of this approach 26 for producing targeted modifications of the superconducting properties in bow-tie Nb nanoconstrictions and nanoSQUIDs. 27 In this work, this procedure is extended to three constrictions following the protocol described in ref. 24.…”

Section: Introductionmentioning

confidence: 99%

Targeted modifications of monolithic multiterminal superconducting weak-links

et al. 2022

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“…Tuning the hole doping of YBCO through electromigration (EM) of oxygen was first studied for thin films [16] and GB junctions [17], and it has seen recent advancements also for YBCO micro bridges [18,19] and nanowires [20]. These developments open up the possibility to modify ex-situ the electrical properties of YBCO nanowire based SQUIDs, similarly to the work on EM of LTS-based SQUIDs [21].…”

Section: Introductionmentioning

confidence: 99%

Electromigration tuning of the voltage modulation depth in YBa₂Cu₃O 7−δ nanowire-based SQUIDs

Trabaldo

Garibaldi

Lombardi

2021

Supercond. Sci. Technol.

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Oxygen electromigration applied to a YBa 2 Cu 3 O 7−δ nanowire can be used to tune its electrical properties. Here, we apply electromigration to YBCO nanowire-based superconducting quantum interference devices (SQUIDs) and study its effect on the voltage modulation depth of the devices. Using a dc electromigration current we replenish the oxygen of the weak links, improving the critical current symmetry of the SQUIDs. AC current electromigration is used to reduce the doping level of the weak links, thus reducing their critical current and increasing differential resistance. Both type of electromigration processes are found to improve the SQUIDs performance, although the best results are obtained with ac biased electromigration, which improved the voltage modulations of the SQUIDs by a factor as high as 8. This procedure can be instrumental to fine tune ex-situ the properties of superconducting electronics where a large number of weak links are required.

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Nb -Based Nanoscale Superconducting Quantum Interference Devices Tuned by Electroannealing

Cited by 11 publications

References 39 publications

Size-Dependent Superconducting Properties of In Nanowire Arrays

Size-Dependent Superconducting Properties of In Nanowire Arrays

Targeted modifications of monolithic multiterminal superconducting weak-links

Electromigration tuning of the voltage modulation depth in YBa₂Cu₃O 7−δ nanowire-based SQUIDs

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Nb -Based Nanoscale Superconducting Quantum Interference Devices Tuned by Electroannealing

Cited by 11 publications

References 39 publications

Size-Dependent Superconducting Properties of In Nanowire Arrays

Size-Dependent Superconducting Properties of In Nanowire Arrays

Targeted modifications of monolithic multiterminal superconducting weak-links

Electromigration tuning of the voltage modulation depth in YBa2Cu3O 7−δ nanowire-based SQUIDs

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Product

Resources

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Electromigration tuning of the voltage modulation depth in YBa₂Cu₃O 7−δ nanowire-based SQUIDs