Journal article · Preprint article
Correlation-induced conductance suppression at level degeneracy in a quantum dot
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.
Language: | English |
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Publisher: | American Physical Society (APS) |
Year: | 2010 |
Pages: | 186804 |
ISSN: | 10797114 and 00319007 |
Types: | Journal article and Preprint article |
DOI: | 10.1103/PhysRevLett.104.186804 |