Please use this identifier to cite or link to this item:
Title: Acoustic valley edge states in a graphene-like resonator system
Authors: Yang, Yahui
Yang, Zhaoju
Zhang, Baile
Keywords: Graphene
Acoustic Waves
Issue Date: 2018
Source: Yang, Y., Yang, Z., & Zhang, B. (2018). Acoustic valley edge states in a graphene-like resonator system. Journal of Applied Physics, 123(9), 091713-. doi:10.1063/1.5009626
Series/Report no.: Journal of Applied Physics
Abstract: The 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.
ISSN: 0021-8979
DOI: 10.1063/1.5009626
Schools: School of Physical and Mathematical Sciences 
Research Centres: Center for Disruptive Photonic Technologies 
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).
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

Files in This Item:
File Description SizeFormat 
Acoustic valley edge states in a graphene-like resonator system.pdf1.52 MBAdobe PDFThumbnail

Citations 10

Updated on Jul 20, 2024

Web of ScienceTM
Citations 10

Updated on Oct 29, 2023

Page view(s) 50

Updated on Jul 22, 2024

Download(s) 20

Updated on Jul 22, 2024

Google ScholarTM




Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.