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Related Experiment Videos

Tunable charge-density wave transport in a current-effect transistor

Markovic1, Dohmen, van Der Zant HS

  • 1Department of Applied Physics and DIMES, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, The Netherlands.

Physical Review Letters
|October 4, 2000
PubMed
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Charge-density wave (CDW) conduction is controlled by a transverse current in a novel device. This reduces the depinning threshold, enabling CDWs to slide at lower fields, consistent with a new dynamical model.

Area of Science:

  • Condensed matter physics
  • Materials science

Background:

  • Collective charge-density wave (CDW) conduction is a key phenomenon in condensed matter.
  • Understanding the dynamics and control of CDWs is crucial for potential applications.

Purpose of the Study:

  • To investigate the effect of a transverse single-particle current on CDW conduction.
  • To explore the modulation of CDW depinning threshold under nonequilibrium conditions.

Main Methods:

  • Fabrication of a transistorlike device to apply transverse currents.
  • Measurement of CDW depinning threshold under varying transverse current conditions.
  • Comparison of experimental results with a theoretical dynamical model.

Main Results:

Related Experiment Videos

  • A transverse single-particle current modulates collective CDW conduction.
  • Nonequilibrium conditions lead to an exponential reduction of the depinning threshold.
  • Experimental findings show excellent agreement with a dynamical model involving "wrinkle" ironing.

    • Conclusions:

    • Transverse currents offer an effective method to control and reduce the depinning threshold of CDWs.
    • The results support a dynamical model for driven periodic media.
    • This work has implications for controlling CDWs and other similar systems like vortex lattices.