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.
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- * The research utilizes semiclassical Boltzmann theory to show that the PHE conductivity is related to the Chern number and energy tilt, predicting new quantized PHE plateaus, while also highlighting the rich interplay between topology and magnetism in this context.
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