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  Quantum dot coupled to topological insulators: The role of edge states

Maurer, M. T., Lin, Y.-T., Kennes, D. M., Pletyukhov, M., Schoeller, H., & Meden, V. (2022). Quantum dot coupled to topological insulators: The role of edge states. Physical Review B, 105(11): 115419. doi:10.1103/PhysRevB.105.115419.

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PhysRevB.105.115419.pdf (Publisher version), 546KB
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PhysRevB.105.115419.pdf
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2022
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© American Physical Society
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https://doi.org/10.1103/PhysRevB.105.115419 (Publisher version)
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https://arxiv.org/abs/2112.11814 (Preprint)
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 Creators:
Maurer, M. T.1, Author
Lin, Y.-T.1, Author
Kennes, D. M.1, 2, 3, Author              
Pletyukhov, M.1, Author
Schoeller, H.1, Author
Meden, V.1, Author
Affiliations:
1Institut für Theorie der Statistischen Physik, RWTH Aachen University and JARA—Fundamentals of Future Information Technology, ou_persistent22              
2Theory Group, Theory Department, Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society, ou_2266715              
3Center for Free-Electron Laser Science, ou_persistent22              

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 Abstract: We investigate a system consisting of one or two topological-insulator leads which are tunnel coupled to a single dot level. The leads are described by the one-dimensional Su-Schrieffer-Heeger model. We show that (topological) edge states cause characteristic features in the dot spectral function, the dot occupation, and the finite-bias current across the dot. As the kinetic energy is quenched in the dot region, local two-particle interactions are of particular relevance there. This motivates us to test whether the aforementioned edge-state features are robust against such interactions; we report here that they are either robust or even enhanced. We conclude that the characteristic features can be used to determine if the leads are in their topologically nontrivial or trivial phase.

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Language(s): eng - English
 Dates: 2021-12-222022-03-042022-03-172022-03-15
 Publication Status: Published in print
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 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1103/PhysRevB.105.115419
arXiv: 2112.11814
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Title: Physical Review B
  Abbreviation : Phys. Rev. B
Source Genre: Journal
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Publ. Info: Woodbury, NY : American Physical Society
Pages: - Volume / Issue: 105 (11) Sequence Number: 115419 Start / End Page: - Identifier: ISSN: 1098-0121
CoNE: https://pure.mpg.de/cone/journals/resource/954925225008