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Radio-frequency scanning tunnelling microscopy

Author

Listed:
  • U. Kemiktarak

    (Department of Physics,)

  • T. Ndukum

    (Cornell University, Ithaca, New York 14853, USA)

  • K. C. Schwab

    (Cornell University, Ithaca, New York 14853, USA)

  • K. L. Ekinci

    (Boston University, Boston, Massachusetts 02215, USA)

Abstract

STM now on radio The scanning tunnelling microscope (STM) is one of the most useful tools in nanoscience. But a severe limitation of the technique is its time resolution. This is determined not by the fundamental physics of tunnelling, but by the limited high-frequency response of the conventional tunnel current read-out circuitry. The radio-frequency STM uses a specially designed radio-frequency measurement circuit to avoid these measurement bandwidth limitations and work reported in this issue shows that the 'RF-STM' can improve on time resolution by a factor of 100 compared to a state-of-the-art STM. Experimental demonstrations of the new fast-imaging instrument illustrate its suitability for three potential applications — fast surface topography, thermometry at the nanometre scale and nanomechanical displacement sensing.

Suggested Citation

  • U. Kemiktarak & T. Ndukum & K. C. Schwab & K. L. Ekinci, 2007. "Radio-frequency scanning tunnelling microscopy," Nature, Nature, vol. 450(7166), pages 85-88, November.
    • Handle: RePEc:nat:nature:v:450:y:2007:i:7166:d:10.1038_nature06238
    DOI: 10.1038/nature06238
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