Conţinutul numărului revistei |
Articolul precedent |
Articolul urmator |
233 1 |
Ultima descărcare din IBN: 2021-11-15 10:50 |
SM ISO690:2012 ORUS, Pablo, FOMIN, Vladimir, DE TERESA, J. M., CORDOBA, Rosa. Critical current modulation induced by an electric field in superconducting tungsten-carbon nanowires. In: Scientific Reports, 2021, vol. 11, pp. 1-9. ISSN 2045-2322. DOI: https://doi.org/10.1038/s41598-021-97075-z |
EXPORT metadate: Google Scholar Crossref CERIF DataCite Dublin Core |
Scientific Reports | |
Volumul 11 / 2021 / ISSN 2045-2322 | |
|
|
DOI:https://doi.org/10.1038/s41598-021-97075-z | |
Pag. 1-9 | |
Descarcă PDF | |
Rezumat | |
The critical current of a superconducting nanostructure can be suppressed by applying an electric field in its vicinity. This phenomenon is investigated throughout the fabrication and electrical characterization of superconducting tungsten-carbon (W-C) nanostructures grown by Ga+ focused ion beam induced deposition (FIBID). In a 45 nm-wide, 2.7 μ m-long W-C nanowire, an increasing side-gate voltage is found to progressively reduce the critical current of the device, down to a full suppression of the superconducting state below its critical temperature. This modulation is accounted for by the squeezing of the superconducting current by the electric field within a theoretical model based on the Ginzburg–Landau theory, in agreement with experimental data. Compared to electron beam lithography or sputtering, the single-step FIBID approach provides with enhanced patterning flexibility and yields nanodevices with figures of merit comparable to those retrieved in other superconducting materials, including Ti, Nb, and Al. Exhibiting a higher critical temperature than most of other superconductors, in which this phenomenon has been observed, as well as a reduced critical value of the gate voltage required to fully suppress superconductivity, W-C deposits are strong candidates for the fabrication of nanodevices based on the electric field-induced superconductivity modulation. |
|
|