Twisted photonic Weyl meta-crystals and aperiodic Fermi arc scattering

Hanyu Wang, Wei Xu, Zeyong Wei, Yiyuan Wang, Zhanshan Wang, Xinbin Cheng, Qinghua Guo (), Jinhui Shi (), Zhihong Zhu () and Biao Yang ()
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Hanyu Wang: National University of Defense Technology
Wei Xu: National University of Defense Technology
Zeyong Wei: Tongji University
Yiyuan Wang: Harbin Engineering University
Zhanshan Wang: Tongji University
Xinbin Cheng: Tongji University
Qinghua Guo: Hunan University
Jinhui Shi: Harbin Engineering University
Zhihong Zhu: National University of Defense Technology
Biao Yang: National University of Defense Technology

Nature Communications, 2024, vol. 15, issue 1, 1-8

Abstract: Abstract As a milestone in the exploration of topological physics, Fermi arcs bridging Weyl points have been extensively studied. Weyl points, as are Fermi arcs, are believed to be only stable when preserving translation symmetry. However, no experimental observation of aperiodic Fermi arcs has been reported so far. Here, we continuously twist a bi-block Weyl meta-crystal and experimentally observe the twisted Fermi arc reconstruction. Although both the Weyl meta-crystals individually preserve translational symmetry, continuous twisting operation leads to the aperiodic hybridization and scattering of Fermi arcs on the interface, which is found to be determined by the singular total reflection around Weyl points. Our work unveils the aperiodic scattering of Fermi arcs and opens the door to continuously manipulating Fermi arcs.

Date: 2024
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DOI: 10.1038/s41467-024-46759-x

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