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dc.contributor.authorYang, Yahuien
dc.contributor.authorYang, Zhaojuen
dc.contributor.authorZhang, Baileen
dc.identifier.citationYang, Y., Yang, Z., & Zhang, B. (2018). Acoustic valley edge states in a graphene-like resonator system. Journal of Applied Physics, 123(9), 091713-. doi:10.1063/1.5009626en
dc.description.abstractThe concept of valley physics, as inspired by the recent development in valleytronic materials, has been extended to acoustic crystals for manipulation of air-borne sound. Many valleytronic materials follow the model of a gapped graphene. Yet the previously demonstrated valley acoustic crystal adopted a mirror-symmetry-breaking mechanism, lacking a direct counterpart in condensed matter systems. In this paper, we investigate a two-dimensional (2D) periodic acoustic resonator system with inversion symmetry breaking, as an analogue of a gapped graphene monolayer. It demonstrates the quantum valley Hall topological phase for sound waves. Similar to a gapped graphene, gapless topological valley edge states can be found at a zigzag domain wall separating different domains with opposite valley Chern numbers, while an armchair domain wall hosts no gapless edge states. Our study offers a route to simulate novel valley phenomena predicted in gapped graphene and other 2D materials with classical acoustic waves.en
dc.description.sponsorshipMOE (Min. of Education, S’pore)en
dc.format.extent4 p.en
dc.relation.ispartofseriesJournal of Applied Physicsen
dc.rights© 2018 The Author(s). All rights reserved. This paper was published by AIP in Journal of Applied Physics and is made available with permission of The Author(s).en
dc.subjectAcoustic Wavesen
dc.titleAcoustic valley edge states in a graphene-like resonator systemen
dc.typeJournal Articleen
dc.contributor.schoolSchool of Physical and Mathematical Sciencesen
dc.contributor.researchCenter for Disruptive Photonic Technologiesen
dc.description.versionPublished versionen
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