Manipulation of Weyl Points in Reciprocal and Nonreciprocal Mechanical Lattices

Mingsheng Tian, Ivan Velkovsky, Tao Chen, Fengxiao Sun, Qiongyi He, Bryce Gadway

Research output: Contribution to journalArticlepeer-review

Abstract

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.

Original languageEnglish (US)
Article number126602
JournalPhysical review letters
Volume132
Issue number12
DOIs
StatePublished - Mar 22 2024

ASJC Scopus subject areas

  • General Physics and Astronomy

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