Observation of the Spinful Higher-Order Topology in Multilayer Td-WTe2

Jekwan Lee,Jaehyeon Kwon,Eunho Lee,Jiwon Park,Soonyoung Cha,Kenji Watanabe, Takashi Taniguci,Moon-Ho Jo,Hyunyong Choi

Conference on Lasers and Electro-Optics（2022）

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摘要

We propose evidence that the multilayer T d -WTe 2 is a higher-order topological insulator. By measuring the Kerr effect using the graphene/WTe 2 heterostructure, we revealed the existence of spinful topological hinge states protected by the time-reversal symmetry.

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关键词

time-reversal symmetry,graphene-tungsten ditelluride heterostructure,spinful topological hinge states,Kerr effect,higher-order topological insulator,multilayer,spinful higher-order topology,C-WTe2

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