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Related Experiment Videos

Acoustoelectric effects in carbon nanotubes

Reulet1, Kasumov, Kociak

  • 1Laboratoire de Physique des Solides, Associe au CNRS, Batiment 510, Universite Paris-Sud, 91405, Orsay, France.

Physical Review Letters
|September 16, 2000
PubMed
Summary

We observed acoustoelectric effects in carbon nanotubes by exciting sound with electric fields. Depending on power, vibrations caused electron heating or broke phase coherence in the nanotubes.

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Area of Science:

  • Condensed Matter Physics
  • Materials Science
  • Nanotechnology

Background:

  • Acoustoelectric effects involve interactions between sound waves and charge carriers in materials.
  • Carbon nanotubes (CNTs) possess unique electronic and mechanical properties suitable for studying such phenomena.
  • Understanding these effects can lead to novel electronic devices and sensors.

Purpose of the Study:

  • To investigate acoustoelectric effects in single-walled carbon nanotubes (SWCNTs).
  • To explore the influence of sound excitation on the electronic properties of SWCNTs.
  • To determine the impact of acoustoelectric vibrations on electron temperature and phase coherence.

Main Methods:

  • Excitation of sound waves in SWCNT ropes using radio-frequency electric fields.

Related Experiment Videos

  • Suspension of SWCNT ropes between metallic contacts.
  • Detection of sound via measurements of DC resistance near critical transitions (superconducting or metal-insulator).
  • Detection of sound via measurements of critical current.

    • Main Results:

    • Demonstrated the observation of acoustoelectric effects in SWCNTs.
    • Showed that sound vibrations can lead to electron heating in CNTs.
    • Revealed that vibrations can cause phase coherence breaking in SWCNTs.
    • Correlated the observed effects with the excitation power.

    Conclusions:

    • Acoustoelectric effects are observable and controllable in carbon nanotube systems.
    • Sound-induced vibrations offer a method to manipulate electron temperature and phase coherence.
    • These findings open possibilities for acoustic control of electronic properties in nanomaterials.