Critical current modulation induced by an electric field in superconducting tungsten-carbon nanowires

Abstract 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 $$^+$$ + fo...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Pablo Orús, Vladimir M. Fomin, José María De Teresa, Rosa Córdoba
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/f85519f0251e42d98045c796d785b523
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:f85519f0251e42d98045c796d785b523
record_format	dspace
spelling	oai:doaj.org-article:f85519f0251e42d98045c796d785b5232021-12-02T17:41:12ZCritical current modulation induced by an electric field in superconducting tungsten-carbon nanowires10.1038/s41598-021-97075-z2045-2322https://doaj.org/article/f85519f0251e42d98045c796d785b5232021-09-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-97075-zhttps://doaj.org/toc/2045-2322Abstract 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 $$\upmu $$ 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.Pablo OrúsVladimir M. FominJosé María De TeresaRosa CórdobaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Pablo Orús Vladimir M. Fomin José María De Teresa Rosa Córdoba Critical current modulation induced by an electric field in superconducting tungsten-carbon nanowires
description	Abstract 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 $$\upmu $$ 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.
format	article
author	Pablo Orús Vladimir M. Fomin José María De Teresa Rosa Córdoba
author_facet	Pablo Orús Vladimir M. Fomin José María De Teresa Rosa Córdoba
author_sort	Pablo Orús
title	Critical current modulation induced by an electric field in superconducting tungsten-carbon nanowires
title_short	Critical current modulation induced by an electric field in superconducting tungsten-carbon nanowires
title_full	Critical current modulation induced by an electric field in superconducting tungsten-carbon nanowires
title_fullStr	Critical current modulation induced by an electric field in superconducting tungsten-carbon nanowires
title_full_unstemmed	Critical current modulation induced by an electric field in superconducting tungsten-carbon nanowires
title_sort	critical current modulation induced by an electric field in superconducting tungsten-carbon nanowires
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/f85519f0251e42d98045c796d785b523
work_keys_str_mv	AT pabloorus criticalcurrentmodulationinducedbyanelectricfieldinsuperconductingtungstencarbonnanowires AT vladimirmfomin criticalcurrentmodulationinducedbyanelectricfieldinsuperconductingtungstencarbonnanowires AT josemariadeteresa criticalcurrentmodulationinducedbyanelectricfieldinsuperconductingtungstencarbonnanowires AT rosacordoba criticalcurrentmodulationinducedbyanelectricfieldinsuperconductingtungstencarbonnanowires
_version_	1718379741452435456

Critical current modulation induced by an electric field in superconducting tungsten-carbon nanowires

Ejemplares similares