Correlation-induced conductance suppression at level degeneracy in a quantum dot.
Publikation/Tidskrift/Serie: Physical Review Letters
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
- Swedish Research Council
- Linne Center for Nanoscience and Quantum Engineering
- Nanometer structure consortium (nmC)
Copyright (2010) by the American Physical Society
- ISSN: 1079-7114