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Communication Dans Un Congrès Année : 2004

Heating process in the pre-breakdown regime of the quantum Hall effect: a size-dependent effect

Ym Meziani
  • Fonction : Auteur
Christophe Chaubet
  • Fonction : Auteur
  • PersonId : 883172
Benoit Jouault
S. Bonifacie
  • Fonction : Auteur
Andre Raymond
  • Fonction : Auteur
  • PersonId : 883173
W. Poirier
  • Fonction : Auteur
F. Piquemal
  • Fonction : Auteur

Résumé

Our study presents experimental measurements of the contact and longitudinal voltage drops in Hall bars, as a function of the current amplitude. We are interested in the heating phenomenon which takes place before the breakdown of the quantum Hall effect, i.e. the pre-breakdown regime. Two types of samples has been investigated, at low temperature (4.2 and 1.5 K) and high magnetic field (up to 13 T). The Hall bars have several different widths, and our observations clearly demonstrate that the size of the sample influences the heating phenomenon. By measuring the critical currents of both contact and longitudinal voltages, as a function of the filling factor (around i = 2), we highlight the presence of a high electric field domain near the source contact, which is observable only in samples whose width is smaller than 400 mum. (C) 2004 Elsevier B.V. All rights reserved.
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Dates et versions

hal-00544447 , version 1 (08-12-2010)

Identifiants

  • HAL Id : hal-00544447 , version 1

Citer

Ym Meziani, Christophe Chaubet, Benoit Jouault, S. Bonifacie, Andre Raymond, et al.. Heating process in the pre-breakdown regime of the quantum Hall effect: a size-dependent effect. 7th International Symposium on Research in High Magnetic Fields, Jul 2003, Toulouse (FRANCE), France. pp.446-450. ⟨hal-00544447⟩
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