Correlation-induced conductance suppression at level degeneracy in a quantum dot.
Summary, in English
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.
- Solid State Physics
- Mathematical Physics
- Department of Electrical and Information Technology
- NanoLund: Center for Nanoscience
Physical Review Letters
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American Physical Society
- Condensed Matter Physics
- Linne Center for Nanoscience and Quantum Engineering
- Nanometer structure consortium (nmC)
- ISSN: 1079-7114