Transition from tunneling to direct contact in tungsten nanojunctions

A. Halbritter, S. Csonka, G. Mihály, E. Jurdik, O. Yu Kolesnychenko, O. I. Shklyarevskii, S. Speller, H. Van Kempen

Research output: Contribution to journalArticle

37 Citations (Scopus)

Abstract

We 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. When flat surfaces approach each other, an avalanchelike jump to direct contact occurs at anomalously large distances z≈3-5 Å. In contrast, ballistic contact between irregularly shaped electrodes is established without discontinuity in conductance curves, indicating the absence of spontaneous formation of an adhesive neck. 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-Å electrode separations are discussed.

Original languageEnglish
Article number035417
Pages (from-to)354171-354177
Number of pages7
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume68
Issue number3
Publication statusPublished - Jul 2003

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Tungsten
tungsten
Electrodes
electrodes
Surface states
Ballistics
histograms
Electronic properties
adhesives
ballistics
proximity
flat surfaces
Adhesives
discontinuity
Metals
curves
electronics
metals

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Halbritter, A., Csonka, S., Mihály, G., Jurdik, E., Kolesnychenko, O. Y., Shklyarevskii, O. I., ... Van Kempen, H. (2003). Transition from tunneling to direct contact in tungsten nanojunctions. Physical Review B - Condensed Matter and Materials Physics, 68(3), 354171-354177. [035417].

Transition from tunneling to direct contact in tungsten nanojunctions. / Halbritter, A.; Csonka, S.; Mihály, G.; Jurdik, E.; Kolesnychenko, O. Yu; Shklyarevskii, O. I.; Speller, S.; Van Kempen, H.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 68, No. 3, 035417, 07.2003, p. 354171-354177.

Research output: Contribution to journalArticle

Halbritter, A, Csonka, S, Mihály, G, Jurdik, E, Kolesnychenko, OY, Shklyarevskii, OI, Speller, S & Van Kempen, H 2003, 'Transition from tunneling to direct contact in tungsten nanojunctions', Physical Review B - Condensed Matter and Materials Physics, vol. 68, no. 3, 035417, pp. 354171-354177.
Halbritter, A. ; Csonka, S. ; Mihály, G. ; Jurdik, E. ; Kolesnychenko, O. Yu ; Shklyarevskii, O. I. ; Speller, S. ; Van Kempen, H. / Transition from tunneling to direct contact in tungsten nanojunctions. In: Physical Review B - Condensed Matter and Materials Physics. 2003 ; Vol. 68, No. 3. pp. 354171-354177.
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