Topologically protected edge states for out-of-plane and in-plane bulk elastic waves

Journal of Physics. Condensed Matter : an Institute of Physics Journal
Shao-Yong HuoHong-Bo Huang

Abstract

Topological phononic insulators (TPnIs) show promise for application in the manipulation of acoustic waves for the design of low-loss transmission and perfectly integrated communication devices. Since solid phononic crystals exist as a transverse polarization mode and a mixed longitudinal-transverse polarization mode, the realization of topological edge states for both out-of-plane and in-plane bulk elastic waves is desirable to enhance the controllability of the edge waves in solid systems. In this paper, a two-dimensional (2D) solid/solid hexagonal-latticed phononic system that simultaneously supports the topologically protected edge states for out-of-plane and in-plane bulk elastic waves is investigated. Firstly, two pairs of two-fold Dirac cones, respectively corresponding to the out-of-plane and in-plane waves, are obtained at the same frequency by tuning the crystal parameters. Then, a strategy of zone folding is invoked to form double Dirac cones. By shrinking and expanding the steel scatterer, the lattice symmetry is broken, and band inversions induced, giving rise to an intriguing topological phase transition. Finally, the topologically protected edge states for both out-of-plane and in-plane bulk elastic waves, which ...Continue Reading

References

Dec 31, 2005·Physical Review Letters·C L Kane, E J Mele
Dec 16, 2006·Science·B Andrei BernevigShou-Cheng Zhang
Apr 4, 2015·Physical Review Letters·Zhaoju YangBaile Zhang
Jul 22, 2015·Physical Review Letters·Long-Hua Wu, Xiao Hu
Sep 19, 2015·Physical Review Letters·Pai WangKatia Bertoldi
Dec 19, 2015·Nano Letters·Leonardo VitiMiriam Vitiello
Jul 5, 2016·Scientific Reports·Zhaoju YangBaile Zhang
Nov 12, 2016·Nature Communications·Yu-Gui PengXue-Feng Zhu

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Citations

Aug 3, 2019·The Journal of the Acoustical Society of America·Shao-Yong HuoHong-Bo Huang
Sep 18, 2021·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Hongbo HuangShaoyong Huo

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