Unraveling a concealed resonance by multiple Kondo transitions in a quantum dot

Journal article

Aritra Lahiri, Tokuro Hata, Sergey Smirnov, Meydi Ferrier, Tomonori Arakawa, Michael Niklas, Magdalena Marganska, Kensuke Kobayashi, Milena Grifoni
Phys. Rev. B, vol. 101(4), American Physical Society, 2020 Jan, p. 041102

DOI: 10.1103/PhysRevB.101.041102

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APA Click to copy
Lahiri, A., Hata, T., Smirnov, S., Ferrier, M., Arakawa, T., Niklas, M., … Grifoni, M. (2020). Unraveling a concealed resonance by multiple Kondo transitions in a quantum dot. Phys. Rev. B, 101(4), 041102. https://doi.org/10.1103/PhysRevB.101.041102

Chicago/Turabian Click to copy
Lahiri, Aritra, Tokuro Hata, Sergey Smirnov, Meydi Ferrier, Tomonori Arakawa, Michael Niklas, Magdalena Marganska, Kensuke Kobayashi, and Milena Grifoni. “Unraveling a Concealed Resonance by Multiple Kondo Transitions in a Quantum Dot.” Phys. Rev. B 101, no. 4 (January 2020): 041102.

MLA Click to copy
Lahiri, Aritra, et al. “Unraveling a Concealed Resonance by Multiple Kondo Transitions in a Quantum Dot.” Phys. Rev. B, vol. 101, no. 4, American Physical Society, Jan. 2020, p. 041102, doi:10.1103/PhysRevB.101.041102.

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@article{lahiri2020a,
  title = {Unraveling a concealed resonance by multiple Kondo transitions in a quantum dot},
  year = {2020},
  month = jan,
  issue = {4},
  journal = {Phys. Rev. B},
  pages = {041102},
  publisher = {American Physical Society},
  volume = {101},
  doi = {10.1103/PhysRevB.101.041102},
  author = {Lahiri, Aritra and Hata, Tokuro and Smirnov, Sergey and Ferrier, Meydi and Arakawa, Tomonori and Niklas, Michael and Marganska, Magdalena and Kobayashi, Kensuke and Grifoni, Milena},
  month_numeric = {1}
}

Abstract

Kondo correlations are responsible for the emergence of a zero-bias peak in the low temperature differential conductance of Coulomb blockaded quantum dots. In the presence of a global SU(2)⊗SU(2) symmetry, which can be realized in carbon nanotubes, they also inhibit inelastic transitions which preserve the Kramers pseudospins associated to the symmetry. We report on magnetotransport experiments on a Kondo correlated carbon nanotube where resonant features at the bias corresponding to the pseudospin-preserving transitions are observed. We attribute this effect to a simultaneous enhancement of pseudospin-nonpreserving transitions occurring at that bias. This process is boosted by asymmetric tunneling couplings of the two Kramers doublets to the leads and by asymmetries in the potential drops at the leads. Hence, the present work discloses a fundamental microscopic mechanisms ruling transport in Kondo systems far from equilibrium.

Magdalena Marganska-Lyzniak

Unraveling a concealed resonance by multiple Kondo transitions in a quantum dot

Journal article

Cite

Abstract

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