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

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

Sammanfattning

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.

Disputation

Nyckelord

  • Physics and Astronomy

Övriga

  • Swedish Research Council
Published
Yes
  • Linne Center for Nanoscience and Quantum Engineering
  • Nanometer structure consortium (nmC)
  • Nano
Copyright (2010) by the American Physical Society
  • ISSN: 1079-7114

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