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Título: | Conductance of electrostatic wire junctions in bilayer graphene |
Autor: | Ryu, Sungguen CSIC ORCID; López, Rosa CSIC ORCID ; Serra, Llorenç CSIC ORCID | Palabras clave: | Physics - Mesoscopic Systems andQuantum Hall Effect Physics - Mesoscopic Systems and Quantum Hall Effect Physics - Materials Science |
Fecha de publicación: | 18-jul-2022 | Editor: | American Physical Society | Citación: | Physical Review B 106(3): 035424 (2022) | Resumen: | The conductance of electrostatic wire junctions in bilayer graphene, classified as trivial-trivial or trivial-topological regarding the confinement character on each junction side, is calculated. The topological side always corresponds to a kink-antikink system, as required for a proper connection with a trivial side. We report a conductance quench of the trivial-topological junction, with a conductance {\it near} quantization to $4e^2/h$, which is only half of the maximum value allowed by the Chern number of a kink-antikink system. The analysis allowed us to uncover the existence of a chiral edge mode in the trivial wire under quite general conditions. A double junction, trivial-topological-trivial, displays periodic Fano-like conductance resonances (dips or peaks) induced by the created topological loop. | Descripción: | 9 pages, 7 figures, PRB accepted | Versión del editor: | https://doi.org/10.1103/PhysRevB.106.035424 | URI: | http://hdl.handle.net/10261/286960 | DOI: | 10.1103/PhysRevB.106.035424 | ISSN: | 2469-9950 | E-ISSN: | 2469-9969 |
Aparece en las colecciones: | (IFISC) Artículos |
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bilayer-graphene.pdf | 1,55 MB | Adobe PDF | Visualizar/Abrir |
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