Tunable Topological Surface States of Three-Dimensional Acoustic Crystals

Topological design for band structures of artificial materials such as acoustic crystals provides a powerful tool to manipulate wave propagating in a robust and symmetry-protected way. In this paper, based on the band folding and breaking mechanism by building blocks with acoustic atoms, we construc...

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Autores principales:	Hua-Shan Lai, Yu-Li Xu, Bo He, Xiao-Chen Sun, Cheng He, Yan-Feng Chen
Formato:	article
Lenguaje:	EN
Publicado:	Frontiers Media S.A. 2021
Materias:	topological material three-dimensional acoustic crystal topological surface state band folding interface glide symmetry Physics QC1-999
Acceso en línea:	https://doaj.org/article/d0455404fdaa41d7a15ec37cea6fd317
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id	oai:doaj.org-article:d0455404fdaa41d7a15ec37cea6fd317
record_format	dspace
spelling	oai:doaj.org-article:d0455404fdaa41d7a15ec37cea6fd3172021-11-08T07:33:44ZTunable Topological Surface States of Three-Dimensional Acoustic Crystals2296-424X10.3389/fphy.2021.789697https://doaj.org/article/d0455404fdaa41d7a15ec37cea6fd3172021-11-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/fphy.2021.789697/fullhttps://doaj.org/toc/2296-424XTopological design for band structures of artificial materials such as acoustic crystals provides a powerful tool to manipulate wave propagating in a robust and symmetry-protected way. In this paper, based on the band folding and breaking mechanism by building blocks with acoustic atoms, we construct a three-dimensional topological acoustic crystal with a large complete bandgap. At a mirror-symmetry domain wall, two gapped symmetry and anti-symmetry surface states can be found in the bandgap, originated from two opposite Su-Schrieffer-Heeger chains. Remarkably, by enforcing a glide symmetry on the domain wall, we can tune the original gapped surface states in a gapless fashion at the boundaries of surface Brillouin zone, acting as omnidirectional acoustic quantum spin Hall effect. Our tunable yet straightforward acoustic crystals offer promising potentials in realizing future topological acoustic devices.Hua-Shan LaiYu-Li XuBo HeXiao-Chen SunCheng HeYan-Feng ChenFrontiers Media S.A.articletopological materialthree-dimensional acoustic crystaltopological surface stateband foldinginterface glide symmetryPhysicsQC1-999ENFrontiers in Physics, Vol 9 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	topological material three-dimensional acoustic crystal topological surface state band folding interface glide symmetry Physics QC1-999
spellingShingle	topological material three-dimensional acoustic crystal topological surface state band folding interface glide symmetry Physics QC1-999 Hua-Shan Lai Yu-Li Xu Bo He Xiao-Chen Sun Cheng He Yan-Feng Chen Tunable Topological Surface States of Three-Dimensional Acoustic Crystals
description	Topological design for band structures of artificial materials such as acoustic crystals provides a powerful tool to manipulate wave propagating in a robust and symmetry-protected way. In this paper, based on the band folding and breaking mechanism by building blocks with acoustic atoms, we construct a three-dimensional topological acoustic crystal with a large complete bandgap. At a mirror-symmetry domain wall, two gapped symmetry and anti-symmetry surface states can be found in the bandgap, originated from two opposite Su-Schrieffer-Heeger chains. Remarkably, by enforcing a glide symmetry on the domain wall, we can tune the original gapped surface states in a gapless fashion at the boundaries of surface Brillouin zone, acting as omnidirectional acoustic quantum spin Hall effect. Our tunable yet straightforward acoustic crystals offer promising potentials in realizing future topological acoustic devices.
format	article
author	Hua-Shan Lai Yu-Li Xu Bo He Xiao-Chen Sun Cheng He Yan-Feng Chen
author_facet	Hua-Shan Lai Yu-Li Xu Bo He Xiao-Chen Sun Cheng He Yan-Feng Chen
author_sort	Hua-Shan Lai
title	Tunable Topological Surface States of Three-Dimensional Acoustic Crystals
title_short	Tunable Topological Surface States of Three-Dimensional Acoustic Crystals
title_full	Tunable Topological Surface States of Three-Dimensional Acoustic Crystals
title_fullStr	Tunable Topological Surface States of Three-Dimensional Acoustic Crystals
title_full_unstemmed	Tunable Topological Surface States of Three-Dimensional Acoustic Crystals
title_sort	tunable topological surface states of three-dimensional acoustic crystals
publisher	Frontiers Media S.A.
publishDate	2021
url	https://doaj.org/article/d0455404fdaa41d7a15ec37cea6fd317
work_keys_str_mv	AT huashanlai tunabletopologicalsurfacestatesofthreedimensionalacousticcrystals AT yulixu tunabletopologicalsurfacestatesofthreedimensionalacousticcrystals AT bohe tunabletopologicalsurfacestatesofthreedimensionalacousticcrystals AT xiaochensun tunabletopologicalsurfacestatesofthreedimensionalacousticcrystals AT chenghe tunabletopologicalsurfacestatesofthreedimensionalacousticcrystals AT yanfengchen tunabletopologicalsurfacestatesofthreedimensionalacousticcrystals
_version_	1718442949388271616

Tunable Topological Surface States of Three-Dimensional Acoustic Crystals

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