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Tunable Dirac cones in two-dimensional acoustic metamaterials with matryoshka structure
Chen M(陈猛); Xu WS(徐文帅); Liu Y(刘宇); Zhang MG; Pei DL; Jiang H(姜恒); Wang YR(王育人)
Corresponding AuthorWang, Yuren(yurenwang@imech.ac.cn)
Source PublicationJOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
2019-07-01
Volume146Issue:1Pages:767-772
ISSN0001-4966
AbstractDirac cones of an acoustic system are the foundation of most topological phase transitions and topological states and have recently become a research hotspot. Although the Dirac cones, Dirac-like cones, double Dirac cones, and semi-Dirac points are all skillfully designed, it is still indispensable to realize a tunable Dirac cone in a novel acoustic structure. This paper proposes two-dimensional acoustic metamaterials with matryoshka structure to achieve tunable Dirac cones and topological spin states. Dirac points can be obtained on the dispersion curves owing to the high symmetry. The concentric circular scattering units of the matryoshka structure are arranged in honeycomb lattices. By a rotating-scatterer mechanism to break the symmetry, the Dirac cone at K (K') is split and the topological spin states appear at the band valley. The existence of a topological transition with opposite Chern numbers as the rotating angle varies is also verified, and helical edge states are obtained along the interfaces separating the topologically opposite spin states insulators. Moreover, the frequency of the Dirac cone is tuned by rotating the inner structure in a double-layer matryoshka structure. (C) 2019 Acoustical Society of America.
DOI10.1121/1.5115007
Indexed BySCI
Language英语
WOS IDWOS:000478628800081
WOS KeywordPHASE
WOS Research AreaAcoustics ; Audiology & Speech-Language Pathology
WOS SubjectAcoustics ; Audiology & Speech-Language Pathology
Funding ProjectNational 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]
Funding OrganizationNational Natural Science Foundation of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Research Program of Beijing
Classification二类
Ranking1
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/79453
Collection国家微重力实验室
Recommended Citation
GB/T 7714
Chen M,Xu WS,Liu Y,et al. Tunable Dirac cones in two-dimensional acoustic metamaterials with matryoshka structure[J]. JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA,2019,146(1):767-772.
APA 陈猛.,徐文帅.,刘宇.,Zhang MG.,Pei DL.,...&王育人.(2019).Tunable Dirac cones in two-dimensional acoustic metamaterials with matryoshka structure.JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA,146(1),767-772.
MLA 陈猛,et al."Tunable Dirac cones in two-dimensional acoustic metamaterials with matryoshka structure".JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA 146.1(2019):767-772.
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