Blocking transport resonances via Kondo many-body entanglement in quantum dots

Journal article

Michael Niklas, Sergey Smirnov, Davide Mantelli, Magdalena Marganska, Ngoc-Viet Nguyen, Wolfgang Wernsdorfer, Jean-Pierre Cleuziou, Milena Grifoni
Nature Communications, vol. 7, 2016, p. 12442

DOI: 10.1038/ncomms12442

View PDF

Cite

APA Click to copy
Niklas, M., Smirnov, S., Mantelli, D., Marganska, M., Nguyen, N.-V., Wernsdorfer, W., … Grifoni, M. (2016). Blocking transport resonances via Kondo many-body entanglement in quantum dots. Nature Communications, 7, 12442. https://doi.org/10.1038/ncomms12442

Chicago/Turabian Click to copy
Niklas, Michael, Sergey Smirnov, Davide Mantelli, Magdalena Marganska, Ngoc-Viet Nguyen, Wolfgang Wernsdorfer, Jean-Pierre Cleuziou, and Milena Grifoni. “Blocking Transport Resonances via Kondo Many-Body Entanglement in Quantum Dots.” Nature Communications 7 (2016): 12442.

MLA Click to copy
Niklas, Michael, et al. “Blocking Transport Resonances via Kondo Many-Body Entanglement in Quantum Dots.” Nature Communications, vol. 7, 2016, p. 12442, doi:10.1038/ncomms12442.

BibTeX Click to copy

@article{niklas2016a,
  title = {Blocking transport resonances via Kondo many-body entanglement in quantum dots},
  year = {2016},
  journal = {Nature Communications},
  pages = {12442},
  volume = {7},
  doi = {10.1038/ncomms12442},
  author = {Niklas, Michael and Smirnov, Sergey and Mantelli, Davide and Marganska, Magdalena and Nguyen, Ngoc-Viet and Wernsdorfer, Wolfgang and Cleuziou, Jean-Pierre and Grifoni, Milena}
}

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 quantitatively show an undiscovered side of Kondo correlations, which counterintuitively block conduction channels: inelastic cotunneling lines in the magnetospectrum of a carbon nanotube strikingly disappear when tuning the gate voltage. Considering the global \SUT\ $\otimes $ \SUT\ symmetry of a carbon nanotube coupled to leads, we find that only resonances involving flips of the Kramers pseudospins, associated to this symmetry, are observed below the Kondo temperature. Our results demonstrate the robust formation of entangled many-body states with no net pseudospin.

Magdalena Marganska-Lyzniak

Blocking transport resonances via Kondo many-body entanglement in quantum dots

Journal article

Cite

Abstract

Follow this website