Niklas, Michael and Smirnov, Sergey and Mantelli, Davide and Marganska, Magdalena and Ngoc-Viet Nguyen, and Wernsdorfer, Wolfgang and Cleuziou, Jean-Pierre and Grifoni, Milena (2016) Blocking transport resonances via Kondo many-body entanglement in quantum dots. NATURE COMMUNICATIONS, 7: 12442. ISSN 2041-1723,
Full text not available from this repository. (Request a copy)Abstract
Many-body entanglement is at the heart of the Kondo effect, which has its hallmark in quantum dots as a zero-bias conductance peak at low temperatures. It signals the emergence of a conducting singlet state formed by a localized dot degree of freedom and conduction electrons. Carbon nanotubes offer the possibility to study the emergence of the Kondo entanglement by tuning many-body correlations with a gate voltage. Here we show another side of Kondo correlations, which counterintuitively tend to block conduction channels: inelastic co-tunnelling lines in the magnetospectrum of a carbon nanotube strikingly disappear when tuning the gate voltage. Considering the global SU(2) circle times SU(2) symmetry of a nanotube coupled to leads, we find that only resonances involving flips of the Kramers pseudospins, associated to this symmetry, are observed at temperatures and voltages below the corresponding Kondo scale. Our results demonstrate the robust formation of entangled many-body states with no net pseudospin.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | SPIN-ORBIT INTERACTION; CARBON NANOTUBES; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Chair Professor Grifoni > Group Milena Grifoni |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 08 Apr 2019 07:18 |
| Last Modified: | 08 Apr 2019 07:18 |
| URI: | https://pred.uni-regensburg.de/id/eprint/3586 |
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