Experimental demonstration of anomalous Floquet topological insulator for sound

Yu-Gui Peng, Cheng-Zhi Qin, Zhao De-Gang, Ya-Xi Shen, Xiang-Yuan Xu, Ming Bao, Han Jia () and Xue-Feng Zhu ()
Additional contact information
Yu-Gui Peng: School of Physics, Huazhong University of Science and Technology
Cheng-Zhi Qin: School of Physics, Huazhong University of Science and Technology
Zhao De-Gang: School of Physics, Huazhong University of Science and Technology
Ya-Xi Shen: School of Physics, Huazhong University of Science and Technology
Xiang-Yuan Xu: Key Laboratory of Noise and Vibration Research, Institute of Acoustics, Chinese Academy of Sciences
Ming Bao: Key Laboratory of Noise and Vibration Research, Institute of Acoustics, Chinese Academy of Sciences
Han Jia: Key Laboratory of Noise and Vibration Research, Institute of Acoustics, Chinese Academy of Sciences
Xue-Feng Zhu: School of Physics, Huazhong University of Science and Technology

Nature Communications, 2016, vol. 7, issue 1, 1-8

Abstract: Abstract Time-reversal invariant topological insulator is widely recognized as one of the fundamental discoveries in condensed matter physics, for which the most fascinating hallmark is perhaps a spin-based topological protection, the absence of scattering of conduction electrons with certain spins on matter surface. Recently, it has created a paradigm shift for topological insulators, from electronics to photonics, phononics and mechanics as well, bringing about not only involved new physics but also potential applications in robust wave transport. Despite the growing interests in topologically protected acoustic wave transport, T-invariant acoustic topological insulator has not yet been achieved. Here we report experimental demonstration of anomalous Floquet topological insulator for sound: a strongly coupled metamaterial ring lattice that supports one-way propagation of pseudo-spin-dependent edge states under T-symmetry. We also demonstrate the formation of pseudo-spin-dependent interface states due to lattice dislocations and investigate the properties of pass band and band gap states.

Date: 2016
References: Add references at CitEc
Citations: View citations in EconPapers (3)

Downloads: (external link)
https://www.nature.com/articles/ncomms13368 Abstract (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:7:y:2016:i:1:d:10.1038_ncomms13368

Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/

DOI: 10.1038/ncomms13368

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().