Topological States in Twisted Pillared Phononic Plates
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Topological States in Twisted Pillared Phononic PlatesData de publicació
2020-09-20Editor
ElsevierCita bibliogràfica
JIN, Yabin; WANG, Wan; WEN, Zhihui; TORRENT, Daniel; DJAFARI ROUHANI, Bahram (2020). Topological States in Twisted Pillared Phononic Plates. Extreme Mechanics Letters, v. 39Tipus de document
info:eu-repo/semantics/articleVersió de l'editorial
https://www.sciencedirect.com/science/article/pii/S2352431620301073Versió
info:eu-repo/semantics/publishedVersionParaules clau / Matèries
Resum
In recent years, the advances in topological insulator in the fields of condensed matter have
been extended to classical wave systems such as acoustic and elastic waves. However, the
quantitative robustness study ... [+]
In recent years, the advances in topological insulator in the fields of condensed matter have
been extended to classical wave systems such as acoustic and elastic waves. However, the
quantitative robustness study of topological states which is indispensable in practical realization
is rarely reported. In this work, we proposed topologically protected edge states with zigzag, bridge
and armchair interfaces in a new twisted phononic plate. The robustness of non-trivial band gap in
bulk structure is clearly presented versus twisted angles, revealing a threshold of 5 degrees which
is the key fundamental information for the robustness of topological edge states. We further
defined a localized displacement ratio as an efficient parameter to characterize edge states. Due to
the different orientation of the three interfaces, zigzag and bridge edge states show higher
quantitative robustness in their localized displacement ratio. A map of robustness as a function of
both frequency and twisted angle highlights the better performance of the topological zigzag edge
state. Robustness is evaluated for twisted angle and for all possible types of interfaces for the first
time, which benefits for the design and fabrication of solid functional devices with great potential
applications. [-]
Publicat a
Extreme Mechanics Letters (2020), v. 39Proyecto de investigación
1) National Natural Science Foundation of China under Grant No.11902223; 2) Shanghai Pujiang Program under Grant No. 19PJ1410100; 3) “Ramón y Cajal” fellowship under grant number RYC-2016-21188; 4) Ministry of Science, Innovation and Universities through Project No. RTI2018- 093921-A-C42.Drets d'accés
http://rightsstatements.org/vocab/CNE/1.0/
info:eu-repo/semantics/openAccess
info:eu-repo/semantics/openAccess
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