Current-induced transition in atomic-sized contacts of metallic alloys

J.W.T. Heemskerk, Y. Noat, D.J. Bakker, J.M. Van Ruitenbeek, B.J. Thijsse, Peter Klaver

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)


We have measured conductance histograms of atomic point contacts made from the noble-transition-metal alloys CuNi, AgPd, and AuPt for a concentration ratio of 1:1. For all alloys these histograms at low-bias voltage (below 300 mV) resemble those of the noble metals, whereas at high bias (above 300 mV) they resemble those of the transition metals. We interpret this effect as a change in the composition of the point contact with bias voltage. We discuss possible explanations in terms of electromigration and differential diffusion induced by current heating.
Original languageEnglish
Article number115416
Pages (from-to)ID: 115416
Number of pages1
JournalPhysical Review B (Condensed Matter)
Issue number11
Publication statusPublished - Mar 2003

ASJC Scopus subject areas

  • Condensed Matter Physics


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