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Preselectable integer quantum conductance of electrochemically fabricated silver point contacts

Appl. Phys. Lett. 93, 043103 (2008); doi:10.1063/1.2955521

Published 28 July 2008

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F.-Q. Xie,1,4 R. Maul,2 S. Brendelberger,1 Ch. Obermair,1,4 E. B. Starikov,2 W. Wenzel,2,4 G. Schön,2,3,4 and Th. Schimmel1,2,4
1Institut für Angewandte Physik, Universität Karlsruhe, 76128 Karlsruhe, Germany
2Forschungszentrum Karlsruhe, Institut für Nanotechnologie, 76021 Karlsruhe, Germany
3Institut für Theoretische Festkörperphysik, Universität Karlsruhe, 76128 Karlsruhe, Germany
4DFG-Center for Functional Nanostructures (CFN), Universität Karlsruhe, 76128 Karlsruhe, Germany
The controlled fabrication of well-ordered atomic-scale metallic contacts is of great interest: it is expected that the experimentally observed high percentage of point contacts with a conductance at noninteger multiples of the conductance quantum G0=2e2/h in simple metals is correlated to defects resulting from the fabrication process. Here we demonstrate a combined electrochemical deposition and annealing method that allows the controlled fabrication of point contacts with preselectable integer quantum conductance. The resulting conductance measurements on silver point contacts are compared with tight-binding-like conductance calculations of modeled idealized junction geometries between two silver crystals with a predefined number of contact atoms. ©2008 American Institute of Physics
History: Received 3 June 2008; accepted 14 June 2008; published 28 July 2008
Permalink: http://link.aip.org/link/?APPLAB/93/043103/1
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KEYWORDS and PACS

Keywords
PACS
  • 81.05.Bx
    Metals, semimetals, and alloys: fabrication, treatment, testing and analysis
  • 73.40.Ns
    Electrical properties of metal-nonmetal contacts
  • 81.15.Pq
    Electrodeposition, electroplating
  • 81.40.Gh
    Other heat and thermomechanical treatments
  • YEAR: 2008

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PUBLICATION DATA

ISSN:
0003-6951 (print)   1077-3118 (online)
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