doi:10.1038/s41598-021-97075-zengOrus, PFomin, VMDe Teresa, JMCordoba, RCritical current modulation induced by an electric field in superconducting tungsten-carbon nanowiresART-2021-126395The 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.2021http://zaguan.unizar.es/record/11878910.1038/s41598-021-97075-zhttp://zaguan.unizar.es/record/118789oai:zaguan.unizar.es:118789info:eu-repo/grantAgreement/EUR/COST-Action/CA16218-Nanocohybriinfo:eu-repo/grantAgreement/ES/CSIC/PIE-202060E187info:eu-repo/grantAgreement/ES/DGA-FEDER/E13-20Rinfo:eu-repo/grantAgreement/EC/H2020/892427/EU/Focused Ion Beam fabrication of superconducting scanning Probes/FIBsuperProbesThis project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 892427-FIBsuperProbesinfo:eu-repo/grantAgreement/ES/MINECO/MAT2017-82970-C2-2-Rinfo:eu-repo/grantAgreement/ES/MINECO/MAT2018-102627-TScientific reports (Nature Publishing Group) 11, 1 (2021), 17698 [9 pp.]byhttp://creativecommons.org/licenses/by/3.0/es/info:eu-repo/semantics/openAccess