Transition from tunneling to direct contact in tungsten nanojunctions

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dc.creatorHalbritter, A.
dc.creatorCsonka, Sz.
dc.creatorMihaly, G.
dc.creatorJurdik, E.
dc.creatorKolesnychenko, O. Yu.
dc.creatorShklyarevskii, O. I.
dc.creatorSpeller, S.
dc.creatorvan Kempen, H.
dc.date2003-04-17
dc.date.accessioned2026-07-07T02:50:50Z
dc.date.available2026-07-07T02:50:50Z
dc.descriptionWe apply the mechanically controllable break junctions technique to investigate the transition from tunneling to direct contact in tungsten. This transition is quite different from that of other metals and is determined by the local electronic properties of the tungsten surface and the relief of the electrodes at the point of their closest proximity. The conductance traces show a rich variety of patterns from the avalanche-like jump to a mesoscopic contact to the completely smooth transition between direct contact and tunneling. Due to the occasional absence of an adhesive jump the conductance of the contact can be continuously monitored at ultra-small electrode separations. The conductance histograms of tungsten are either featureless or show two distinct peaks related to the sequential opening of spatially separated groups of conductance channels. The role of surface states of tungsten and their contribution to the junction conductance at sub-Angstrom electrode separations are discussed.
dc.description6 pages, 6 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0304389
dc.identifierhttp://arxiv.org/abs/cond-mat/0304389
dc.identifierPhys. Rev. B 68, 035417 (2003)
dc.identifierdoi:10.1103/PhysRevB.68.035417
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/21244
dc.subjectMesoscale and Nanoscale Physics
dc.titleTransition from tunneling to direct contact in tungsten nanojunctions
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