UCL logo

UCL Discovery

UCL home » Library Services » Electronic resources » UCL Discovery

Tunability of the superconductivity of tungsten films grown by focused-ion-beam direct writing

Li, WX; Fenton, JC; Wang, YQ; McComb, DW; Warburton, PA; (2008) Tunability of the superconductivity of tungsten films grown by focused-ion-beam direct writing. Journal of Applied Physics , 104 (9) , Article 093913. 10.1063/1.3013444. Green open access

[img]
Preview
PDF
152821.pdf

Download (830kB)

Abstract

We have grown tungsten-containing films by focused-ion-beam (FIB)-induced chemical vapor deposition. The films lie close to the metal-insulator transition with an electrical conductivity which changes by less than 5% between room temperature and 7 K. The superconducting transition temperature T-c of the films can be controlled between 5.0 and 6.2 K by varying the ion-beam deposition current. The Tc can be correlated with how far the films are from the metal-insulator transition, showing a nonmonotonic dependence, which is well described by the heuristic model of [Osofsky et al., Phys. Rev. Lett. 87, 197004 (2001)]. Our results suggest that FIB direct-writing of W composites might be a potential approach to fabricate mask-free superconducting devices as well as to explore the role of reduced dimensionality on superconductivity. (C) 2008 American Institute of Physics. [DOI: 10.1063/1.3013444]

Type: Article
Title: Tunability of the superconductivity of tungsten films grown by focused-ion-beam direct writing
Open access status: An open access version is available from UCL Discovery
DOI: 10.1063/1.3013444
Publisher version: http://dx.doi.org/10.1063/1.3013444
Language: English
Additional information: © 2008 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Vol. 104 Issue 9 and may be found at http://jap.aip.org/resource/1/japiau/v104/i9/p093913_s1
Keywords: METAL-INSULATOR-TRANSITION, CHEMICAL-VAPOR-DEPOSITION, AMORPHOUS SI1-XAUX, BETA-TUNGSTEN, ALLOY-FILMS, NANOWIRES, SYSTEM
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology
URI: http://discovery.ucl.ac.uk/id/eprint/152821
Downloads since deposit
262Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item