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- W4290839617 abstract "Dirac points in the band structure of acoustic systems are essential features affording classical analogs of quantum condensed matter states. We show that measured dispersion curves near and at the Dirac point of an acoustic graphene analog can be suppressed by strong variations in the impedance boundary between free field and surface wave regimes under certain conditions. Increased Rayleigh scattering and diffractive excitation are shown to increase the dispersed surface wave pressure amplitude, circumventing the impedance-based wave suppression. The improved excitation and scattering conditions for observing acoustic Dirac points for two samples with two distinct operational frequency ranges are reported." @default.
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- W4290839617 date "2022-08-12" @default.
- W4290839617 modified "2023-09-24" @default.
- W4290839617 title "Frequency-dependent surface wave suppression at the Dirac point of an acoustic graphene analog" @default.
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- W4290839617 doi "https://doi.org/10.1103/physrevb.106.064301" @default.
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