Massive topological edge channels in three-dimensional topological materials induced by extreme surface anisotropy

A two-dimensional quantum spin Hall insulator exhibits one-dimensional gapless spin-filtered edge channels allowing for dissipationless transport of charge and spin. However, the sophisticated fabrication requirement of two-dimensional materials and the low capacity of one-dimensional channels hinde...

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Bibliographic Details
Published in:arXiv.org 2023-11
Main Authors: Zhu, Fengfeng, Chenqiang Hua, Wang, Xiao, Lin, Miao, Su, Yixi, Hashimoto, Makoto, Lu, Donghui, Shen, Zhi-Xun, Jin-Feng, Jia, Lu, Yunhao, Guan, Dandan, Qian, Dong
Format: Article
Language:English
Subjects:
Anisotropy
Channels
First principles
Mathematical morphology
Photoelectric emission
Power consumption
Synergistic effect
Topology
Two dimensional materials
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Summary:A two-dimensional quantum spin Hall insulator exhibits one-dimensional gapless spin-filtered edge channels allowing for dissipationless transport of charge and spin. However, the sophisticated fabrication requirement of two-dimensional materials and the low capacity of one-dimensional channels hinder the broadening applications. We introduce a method to manipulate a three-dimensional topological material to host a large number of one-dimensional topological edge channels utilizing surface anisotropy. Taking ZrTe5 as a model system, we realize a highly anisotropic surface due to the synergistic effect of the lattice geometry and Coulomb interaction, and achieve massive one-dimensional topological edge channels -- confirmed by electronic characterization using angle-resolved photoemission spectroscopy, in combination with first-principles calculations. Our work provides a new avenue to engineer the topological properties of three-dimensional materials through nanoscale tunning of surface morphology and opens up a promising prospect for the development of low-power-consumption electronic nano devices based on one-dimensional topological edge channels.
ISSN:2331-8422