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Correlation-induced conductance suppression at level degeneracy in a quantum dot.

Publiceringsår: 2010
Språk: Engelska
Publikation/Tidskrift/Serie: Physical Review Letters
Volym: 104
Nummer: 18
Dokumenttyp: Artikel i tidskrift
Förlag: American Physical Society


The large, level-dependent g factors in an InSb nanowire quantum dot allow for the occurrence of a variety of level crossings in the dot. While we observe the standard conductance enhancement in the Coulomb blockade region for aligned levels with different spins due to the Kondo effect, a vanishing of the conductance is found at the alignment of levels with equal spins. This conductance suppression appears as a canyon cutting through the web of direct tunneling lines and an enclosed Coulomb blockade region. In the center of the Coulomb blockade region, we observe the predicted correlation-induced resonance. Our findings are supported by numerical and analytical calculations.


  • Condensed Matter Physics


  • Linne Center for Nanoscience and Quantum Engineering-lup-obsolete
  • Nanometer structure consortium (nmC)-lup-obsolete
  • Nano-lup-obsolete
  • ISSN: 1079-7114

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