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- W2912138984 abstract "Surface acoustic waves (SAWs) are elastic waves localized on a surface of an elastic body. We theoretically study topological edge modes of SAWs for a corrugated surface. We introduce a corrugation forming a triangular lattice on the surface of an elastic body. We treat the corrugation as a perturbation, and construct eigenmodes on a corrugated surface by superposing those for the flat surface at wave vectors which are mutually different by reciprocal-lattice vectors. We thereby show emergence of Dirac cones at the $K$ and ${K}^{ensuremath{'}}$ points analytically. Moreover, by breaking the time-reversal symmetry, we show that the Dirac cones open a gap, and that the Chern number for the lowest band has a nonzero value. This indicates the existence of topological chiral edge modes of SAWs in the gap." @default.
- W2912138984 created "2019-02-21" @default.
- W2912138984 creator A5041085897 @default.
- W2912138984 creator A5043272002 @default.
- W2912138984 date "2019-05-22" @default.
- W2912138984 modified "2023-10-15" @default.
- W2912138984 title "Topological band structure of surface acoustic waves on a periodically corrugated surface" @default.
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- W2912138984 doi "https://doi.org/10.1103/physrevb.99.195443" @default.
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