Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/84041
Title: Acoustic Type-II Weyl Nodes from Stacking Dimerized Chains
Authors: Yang, Zhaoju
Zhang, Baile
Keywords: Ultrasonics
Linear Acoustics
Issue Date: 2016
Source: Yang, Z., & Zhang, B. (2016). Acoustic Type-II Weyl Nodes from Stacking Dimerized Chains. Physical Review Letters, 117, 224301-.
Series/Report no.: Physical Review Letters
Abstract: Lorentz-violating type-II Weyl fermions, which were missed in Weyl’s prediction of nowadays classified type-I Weyl fermions in quantum field theory, have recently been proposed in condensed matter systems. The semimetals hosting type-II Weyl fermions offer a rare platform for realizing many exotic physical phenomena that are different from type-I Weyl systems. Here we construct the acoustic version of a type-II Weyl Hamiltonian by stacking one-dimensional dimerized chains of acoustic resonators. This acoustic type-II Weyl system exhibits distinct features in a finite density of states and unique transport properties of Fermi-arc-like surface states. In a certain momentum space direction, the velocity of these surface states is determined by the tilting direction of the type-II Weyl nodes rather than the chirality dictated by the Chern number. Our study also provides an approach of constructing acoustic topological phases at different dimensions with the same building blocks.
URI: https://hdl.handle.net/10356/84041
http://hdl.handle.net/10220/42912
ISSN: 0031-9007
DOI: 10.1103/PhysRevLett.117.224301
Rights: © 2016 American Physical Society. This paper was published in Physical Review Letters and is made available as an electronic reprint (preprint) with permission of American Physical Society. The published version is available at: [http://dx.doi.org/10.1103/PhysRevLett.117.224301]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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