Observation of Floquet topological phases with large Chern numbers

• URL: http://arxiv.org/abs/2209.05275v1
• Date: Mon, 12 Sep 2022 14:33:03 GMT
• Title: Observation of Floquet topological phases with large Chern numbers
• Authors: Kai Yang, Shaoyi Xu, Longwen Zhou, Zhiyuan Zhao, Tianyu Xie, Zhe Ding, Wenchao Ma, Jiangbin Gong, Fazhan Shi, Jiangfeng Du
• Abstract summary: We experimentally simulate a periodically quenched generalized Haldane model on an NV center in diamond. Our work reveals the power of Floquet driving in transforming system's topology and generating large Chern number phases.
• Score: 15.623755898115517
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: One of the most intriguing advantage of Floquet engineering is to generate new phases with large topological invariants. In this work, we experimentally simulate a periodically quenched generalized Haldane model on an NV center in diamond, and observe its Floquet Chern insulator phases with Chern numbers $C=1,2,4$ by imaging the static and dynamic spin textures in momentum space. Our work reveals the power of Floquet driving in transforming system's topology and generating large Chern number phases. It further establishes a unique experimental scheme to detect Floquet topological phases in two and higher spatial dimensions.

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