2021/12/31 by Martin T. Maurer, Yen‐Ting Lin, Yen-Ting Lin +5
Materials Science · Mathematics · Physics and Astronomy · #Computer science #Condensed matter physics #Enhanced Data Rates for GSM Evolution #Graphene research and applications #Mathematics #Physics #Quantum and electron transport phenomena #Quantum dot #Quantum mechanics #Statistical physics #Topological Materials and Phenomena #Topological insulator #Topology (electrical circuits) #cond-mat.mes-hall
paper · pdf · doi:10.1103/physrevb.105.115419
published as Phys. Rev. B 105, 115419 (2022) · 13 pages, 8 figures
arxiv created 2022/03/17 · openalex publication_date 2022/03/17 · arxiv updated 2022/03/18 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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 non-trivial or trivial phase.