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

  • Pablo F. Damasceno
  • Cláudio José DaSilva
  • José Pedro Rino
  • Ladir Cândido
Article

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

Abstract

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.

Keywords

Collective transportElectrons in heliumNon-linear phenomena

Copyright information

© Springer Science+Business Media, LLC 2010

Authors and Affiliations

  • Pablo F. Damasceno
    • 2
  • Cláudio José DaSilva
    • 2
  • José Pedro Rino
    • 2
  • Ladir Cândido
    • 3
    • 4
  1. 1.Applied Physics DepartmentThe University of MichiganAnn ArborUSA
  2. 2.Departamento de FísicaUniversidade Federal de São CarlosSão CarlosBrazil
  3. 3.Instituto de FísicaUniversidade Federal de GoiásGoiâniaBrazil
  4. 4.Instituto de Física de São CarlosUniversidade de São PauloSão CarlosBrazil