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Article overview
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Helical edge states in phononic systems using bi-layered lattices | | Raj Kumar Pal
; Marshall Schaeffer
; Massimo Ruzzene
; | | Date: |
24 Nov 2015 | | Abstract: | We propose a framework to realize helical edge states in phononic lattices
using two identical lattices with interlayer couplings between them. There are
two masses at each site corresponding to the two lattices, which is analogous
to up and down spin electrons in a quantum mechanical lattice. A methodology is
presented to systematically transform a quantum mechanical lattice which
exhibits edge states to a phononic lattice, thereby developing a family of
lattices with edge states. A potential realization in terms of fundamental
mechanical building blocks is presented for the hexagonal and Lieb lattices.
The proposed framework is verified by numerical simulations, which illustrate
that the direction of wave propagation can be controlled by appropriate
polarization of lattice excitation. | | Source: | arXiv, 1511.7507 | | Services: | Forum | Review | PDF | Favorites | |
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