Imaging backscattering through impurity-induced antidots in quantum Hall constrictions (Articolo in rivista)

Type
Label
  • Imaging backscattering through impurity-induced antidots in quantum Hall constrictions (Articolo in rivista) (literal)
Anno
  • 2012-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1103/PhysRevB.86.085326 (literal)
Alternative label
  • Paradiso, N; Heun, S; Roddaro, S; Biasiol, G; Sorba, L; Venturelli, D; Taddei, F; Giovannetti, V; Beltram, F (2012)
    Imaging backscattering through impurity-induced antidots in quantum Hall constrictions
    in Physical review. B, Condensed matter and materials physics
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Paradiso, N; Heun, S; Roddaro, S; Biasiol, G; Sorba, L; Venturelli, D; Taddei, F; Giovannetti, V; Beltram, F (literal)
Pagina inizio
  • 085326 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 86 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 8 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • 1. CNR, NEST, Ist Nanosci, I-56100 Pisa, Italy 2. Scuola Normale Super Pisa, Pisa, Italy 3. CNR, Lab TASC, Ist Officina Mat, Basovizza, TS, Italy (literal)
Titolo
  • Imaging backscattering through impurity-induced antidots in quantum Hall constrictions (literal)
Abstract
  • We exploit the biased tip of a scanning gate microscope to induce a controlled backscattering between counterpropagating edge channels in a wide constriction in the quantum Hall regime. We compare our detailed conductance maps with a numerical percolation model and demonstrate that conductance fluctuations observed in these devices as a function of the gate voltage originate from backscattering events mediated by localized states pinned by potential fluctuations. Our imaging technique allows us to identify the necessary conditions for the activation of these backscattering processes and also to reconstruct the constriction confinement potential profile and the underlying disorder. (literal)
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