Acoustic valley edge states in a graphene-like system with sub-wavelength resonator | |
Jiang H(姜恒); Chen M(陈猛); Liu Y(刘宇); Yang T(杨涛); Xu WS(徐文帅); Liu YH; Zhang MG; Wang YR(王育人) | |
刊名 | JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA |
2019-07-01 | |
卷号 | 146期号:1页码:736-741 |
ISSN号 | 0001-4966 |
DOI | 10.1121/1.5115016 |
英文摘要 | Recently, the study of topological phase transitions and edge states for acoustic wave systems has become a research hotspot. However, most current studies on topological edge states are based on Bragg scattering, which is not practical to apply in situations involving low-frequency sound because of the large structural dimensions. Therefore, the authors construct, in this study, a graphene-like structure based on a sub-wavelength resonant unit Helmholtz resonator and adjust the acoustic capacitance diameter of adjacent units to change the local resonance frequency, and thereby impose the degeneracy of the Dirac cone and topological spin states, which is characterized by valley Chern numbers of opposite sign. The authors also check topological valley edge states at zigzag and armchair interfaces and find that gapless topological valley edge states only appear at zigzag interfaces, whereas armchair interfaces host gap edge states. Moreover, the results show that the transmission properties of edge states in a zigzag rectangular waveguide are immune to backscattering and defects. (C) 2019 Acoustical Society of America. |
分类号 | 二类 |
资助项目 | National Natural Science Foundation of China[11602269] ; National Natural Science Foundation of China[11802213] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDB22040301] ; Research Program of Beijing[Z161100002616034] ; Research Program of Beijing[Z171100000817010] |
WOS研究方向 | Acoustics ; Audiology & Speech-Language Pathology |
语种 | 英语 |
WOS记录号 | WOS:000478628800078 |
资助机构 | National Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Research Program of Beijing |
内容类型 | 期刊论文 |
源URL | [http://dspace.imech.ac.cn/handle/311007/79461] |
专题 | 力学研究所_国家微重力实验室 |
通讯作者 | Wang YR(王育人) |
推荐引用方式 GB/T 7714 | Jiang H,Chen M,Liu Y,et al. Acoustic valley edge states in a graphene-like system with sub-wavelength resonator[J]. JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA,2019,146(1):736-741. |
APA | Jiang H.,Chen M.,Liu Y.,Yang T.,Xu WS.,...&Wang YR.(2019).Acoustic valley edge states in a graphene-like system with sub-wavelength resonator.JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA,146(1),736-741. |
MLA | Jiang H,et al."Acoustic valley edge states in a graphene-like system with sub-wavelength resonator".JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA 146.1(2019):736-741. |
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