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Related Experiment Videos

Off-Resonance Conduction Through Atomic Wires

Yazdani1, Eigler, Lang

  • 1A. Yazdani and D. M. Eigler, IBM Research Division, Almaden Research Center, 650 Harry Road, San Jose, CA 95120, USA. N. D. Lang, IBM Research Division, Thomas J. Watson Research Center, Yorktown Heights, NY 10598, USA.

Science (New York, N.Y.)
|June 28, 1996
PubMed
Summary

Researchers measured the electrical resistance of single and double xenon atom systems. Both methods showed high resistance (10^5 and 10^7 ohms) due to conduction through atomic electronic states.

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Area of Science:

  • Condensed matter physics
  • Atomic physics
  • Quantum electronics

Background:

  • Understanding electrical transport at the atomic scale is crucial for developing next-generation electronic devices.
  • Previous studies have explored quantum effects in nanoscale conductors, but atomic-scale resistance mechanisms remain an active area of research.

Purpose of the Study:

  • To measure and calculate the electrical resistance of single and double xenon atom systems.
  • To investigate the underlying physical mechanisms responsible for high resistance in atomic-scale conductors.
  • To validate the atom-jellium model for predicting electronic transport properties of individual atoms.

Main Methods:

  • Electrical resistance measurements were performed on single and double xenon atom wire configurations.

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  • Theoretical calculations were conducted using an atom-jellium model.
  • Comparison of experimental results with theoretical predictions.

    • Main Results:

    • A resistance of 10^5 ohms was observed and calculated for the single xenon atom system.
    • A resistance of 10^7 ohms was observed and calculated for the double xenon atom system.
    • Measured and calculated resistances significantly exceeded that of an ideal one-dimensional conductor.

    Conclusions:

    • Conduction through xenon atoms occurs via the 6s resonance tail, significantly above the Fermi level.
    • The high resistance is attributed to the electronic states of individual xenon atoms.
    • The atom-jellium model provides a valid framework for understanding conduction in atom-sized systems.