期刊
PHYSICAL REVIEW B
卷 98, 期 9, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.98.094302
关键词
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资金
- Air Force Office of Scientific Research [AF 9550-18-1-0342, AF 9550-18-1-0096]
- NSF EFRI [1641078]
- Army Research office [W911NF-18-1-0031]
- 111 Project [B16003]
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.
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