Manipulation of Weyl Points in Reciprocal and Nonreciprocal Mechanical Lattices

We introduce feedback-measurement technologies to achieve flexible control of Weyl points and conduct the first experimental demonstration of Weyl type I-II transition in mechanical systems. We demonstrate that non-Hermiticity can expand the Fermi arc surface states from connecting Weyl points to We...

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Bibliographic Details
Published inPhysical review letters Vol. 132; no. 12; p. 126602
Main Authors Tian, Mingsheng, Velkovsky, Ivan, Chen, Tao, Sun, Fengxiao, He, Qiongyi, Gadway, Bryce
Format Journal Article
LanguageEnglish
Published United States 22.03.2024
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Summary:We introduce feedback-measurement technologies to achieve flexible control of Weyl points and conduct the first experimental demonstration of Weyl type I-II transition in mechanical systems. We demonstrate that non-Hermiticity can expand the Fermi arc surface states from connecting Weyl points to Weyl rings, and lead to a localization transition of edge states influenced by the interplay between band topology and the non-Hermitian skin effect. Our findings offer valuable insights into the design and manipulation of Weyl points in mechanical systems, providing a promising avenue for manipulating topological modes in non-Hermitian systems.
ISSN:1079-7114
DOI:10.1103/PhysRevLett.132.126602