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

Publication: Research - peer-reviewJournal article – Annual report year: 2010

Without internal affiliation

  • Author: Nilsson, H.A.

    Lund University

  • Author: Karlström, O.

    Lund University

  • Author: Larsson, M.

    Lund University

  • Author: Caroff, P.

    Lund University

  • Author: Pedersen, Jonas Nyvold

    Unknown

  • Author: Samuelson, L.

    Lund University

  • Author: Wacker, A.

    Lund University

  • Author: Wernersson, L.-E.

    Lund University

  • Author: Xu, H.Q.

    Lund University

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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. © 2010 The American Physical Society.
Original languageEnglish
JournalPhysical Review Letters
Publication date2010
Volume104
Issue18
Pages186804
ISSN0031-9007
DOIs
StatePublished
CitationsWeb of Science® Times Cited: 19
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