Journal of Low Temperature Physics

, Volume 160, Issue 1, pp 58–67

Temperature and Pinning Effects on Driving a 2D Electron System on a Helium Film: A Numerical Study


    • Departamento de FísicaUniversidade Federal de São Carlos
  • Cláudio José DaSilva
    • Departamento de FísicaUniversidade Federal de São Carlos
  • José Pedro Rino
    • Departamento de FísicaUniversidade Federal de São Carlos
  • Ladir Cândido
    • Instituto de FísicaUniversidade Federal de Goiás
    • Instituto de Física de São CarlosUniversidade de São Paulo

DOI: 10.1007/s10909-010-0172-9

Cite this article as:
Damasceno, P.F., DaSilva, C.J., Rino, J.P. et al. J Low Temp Phys (2010) 160: 58. doi:10.1007/s10909-010-0172-9


Using numerical simulations we investigated the dynamic response to an externally driven force of a classical two-dimensional (2D) electron system on a helium film at finite temperatures. A potential barrier located at the center of the system behaves as a pinning center that results in an insulator state below a threshold driving force. We have found that the current-voltage characteristic obeys the scaling relation I=fξ, with ξ ranging from ∼(1.0–1.7) for different pinning strengths and temperatures. Our results may be used to understand the spread range of ξ in experiments with typical characteristic of plastic depinning.


Collective transportElectrons in heliumNon-linear phenomena

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© Springer Science+Business Media, LLC 2010