Elastic quantum spin Hall effect in kagome lattices

H. Chen, H. Nassar, A. N. Norris, G. K. Hu, G. L. Huang

Research output: Contribution to journalArticlepeer-review

54 Scopus citations


A mechanical analog to the quantum spin Hall insulator (QSHI) is implemented into a simple mass-spring kagome lattice. The transition from the trivial state to the topological one is described by an invariant Chern number function of a contrast parameter. The band diagram and helical edge states characteristic of QSHI are obtained by a combination of numerical and analytical methods. In particular, these states are shown to be Stoneley wave solutions to a set of asymptotic continuous motion equations. Last, scatterless propagation of polarized topological edge waves around sharp corners is demonstrated and robustness is assessed through a parametric study.

Original languageEnglish (US)
Article number094302
JournalPhysical Review B
Issue number9
StatePublished - Sep 5 2018

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


Dive into the research topics of 'Elastic quantum spin Hall effect in kagome lattices'. Together they form a unique fingerprint.

Cite this