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DTSTART;VALUE=DATE:20230426T165000
DTEND;VALUE=DATE:20230426T165000
UID:13364@agenda.unifr.ch
DESCRIPTION:In the hunt for room-temperature quantum spin Hall insulators, bismuthene [1] has demonstrated the impressive advantage of a local spin-orbit coupling experienced by the in-plane p-orbitals. This alternative to pi-bond graphene can be pushed to a conceptually even more essential level upon halving the honeycomb lattice, i.e. considering chiral p-orbitals on a triangular lattice. We theoretically conceive and experimentally realize for the first time a triangular real-space obstructed QSHI [2,3], "indenene", an indium monolayer exhibiting non-trivial valley physics and a large gap, as well as representing a model platform for higher-order topology [4]. We identify an interference mechanism of the Bloch functions and the emergence of a hidden honeycomb pattern in the charge localization, which makes the topological classification accessible to bulk experiments, without the necessity of quantum edge transport.
SUMMARY:Emergent honeycomb physics from chiral atomic orbitals on a triangular lattice
CATEGORIES:Colloque / Congrès / Forum
LOCATION:PER 08\, 0.51\, Chemin du Musée 3\, 1700 Fribourg
URL;VALUE=URI:https://agenda.unifr.ch/e/fr/13364
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