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Highly disorder tolerant conductance in complex nanoarchetecture

Datum
12.05.2023
Zeit
11:00 - 12:00
Sprecher
Dr. Yu-Jie Zhong
Zugehörigkeit
NCKU Taiwan
Sprache
en
Hauptthema
Materialien
Host
Grit Rötzer
Beschreibung
In graphene-like ribbon system, the robust topological valley state is a Dirac cone-like ground state which possesses topological merit in electronic transport. They mostly exist at a special interface or boundaries such as the domain walls between AB- and BA-stacked bilayer graphene. In radial superlattice, however, the emergence of robust topological valley states spontaneously occurs due to its intrinsic intersecting of two layers – a unique boundary condition with one closed and two open endpoints. In this work, we developed a semi-analytic model to account for the robustness of electronic transport and interpret the emergence of robust topological valley states in radial superlattice. In two-winding carbon nanoscrolls, a well-built-up radial superlattice, topological valley states occurring naturally due to the scroll boundaries are inherited from graphene nanoribbon. Particularly, we found that not only the number of topological states increases by 300 % but also the electronic transport becomes robust against the material defects when the magnetic flux is applied. Our results offer new pathways for spatially creating topological valley states in the curved graphene-like nanomembrane. The significance of these states is that their nature, number, and also robustness are artificially controllable by magnetic flux which we apply. .
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Letztmalig verändert: 12.05.2023, 07:37:40

Veranstaltungsort

Leibniz Institut für Festkörper- und Werkstoffforschung Dresden (B3E.26, IFW Dresden)Helmholtzstraße2001069Dresden
Homepage
http://www.ifw-dresden.de

Veranstalter

Leibniz Institut für Festkörper- und Werkstoffforschung DresdenHelmholtzstraße2001069Dresden
Homepage
http://www.ifw-dresden.de
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