Resumen: 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 mu 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. Idioma: Inglés DOI: 10.1038/s41598-021-97075-z Año: 2021 Publicado en: Scientific reports (Nature Publishing Group) 11, 1 (2021), 17698 [9 pp.] ISSN: 2045-2322 Factor impacto JCR: 4.997 (2021) Categ. JCR: MULTIDISCIPLINARY SCIENCES rank: 19 / 74 = 0.257 (2021) - Q2 - T1 Factor impacto SCIMAGO: 1.005 - Multidisciplinary (Q1)