Fractional Conductance Quantization in Metallic Nanoconstrictions under Electrochemical Potential Control

C. Shu, C. Z. Li, H. X. He, A. Bogozi, J. S. Bunch, N. J. Tao

Research output: Contribution to journalArticlepeer-review

95 Scopus citations

Abstract

We study the electrical conductance of gold nanoconstrictions by controlling the electrochemical potential. At positive potentials, the conductance is quantized near integer multiples of G0(2e2/h) as shown by well-defined peaks in the conductance histogram. Below a certain potential, however, additional peaks near 0.5G0 and 1.5G0 appear in the histogram. The fractional conductance steps are as stable and well defined as the integer steps. The experimental data are discussed in terms of electrochemical-potential-induced defect scattering and Fermi energy shift, but a complete theory of the phenomenon is yet to be developed.

Original languageEnglish (US)
Pages (from-to)5196-5199
Number of pages4
JournalPhysical Review Letters
Volume84
Issue number22
DOIs
StatePublished - May 29 2000

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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