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Article Dans Une Revue Physical Review Letters Année : 2012

Dynamical Coulomb Blockade Observed in Nanosized Electrical Contacts

Christophe Brun
Konrad H. Mueller
  • Fonction : Auteur
I-Po Hong
  • Fonction : Auteur
Francois Patthey
  • Fonction : Auteur
Wolf-Dieter Schneider
  • Fonction : Auteur

Résumé

Electrical contacts between nanoengineered systems are expected to constitute the basic building blocks of future nanoscale electronics. However, the accurate characterization and understanding of electrical contacts at the nanoscale is an experimentally challenging task. Here, we employ low-temperature scanning tunneling spectroscopy to investigate the conductance of individual nanocontacts formed between flat Pb islands and their supporting substrates. We observe a suppression of the differential tunnel conductance at small bias voltages due to dynamical Coulomb blockade effects. The differential conductance spectra allow us to determine the capacitances and resistances of the electrical contacts which depend systematically on the island-substrate contact area. Calculations based on the theory of environmentally assisted tunneling agree well with the measurements.

Dates et versions

hal-01233584 , version 1 (25-11-2015)

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Citer

Christophe Brun, Konrad H. Mueller, I-Po Hong, Francois Patthey, Christian Flindt, et al.. Dynamical Coulomb Blockade Observed in Nanosized Electrical Contacts. Physical Review Letters, 2012, 108 (12), pp.126802. ⟨10.1103/PhysRevLett.108.126802⟩. ⟨hal-01233584⟩
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