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arXiv · 2112.07226

Possible realization of a phononic tsunami in a wedge-shaped sample

Yuriy Yerin·Andrey Varlamov·Claudia Fasolato·Francesco Sacchetti·Paolo Postorino·Caterina Petrillo
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Abstract

Exploiting the theory of solitons in a nonlinear elastic medium we predict a novel phenomenon called a phononic tsunami, which is characterized by the dramatic increase of the local amplitude of phonon modes. To elucidate the possible experimental detection of this phenomenon we propose to use a wedge-shaped sample in which a sharp edge serves for the emulation of the shoaling effect and such a local enhancement can be observed. Together with eigenfrequencies of transverse and longitudinal phonon modes of a system we find the characteristic dispersion relations that can be considered as a hallmark of a phononic tsunami. We justify our predictions by means of analytical calculations and numerical simulations showing a possible realization of this nonlinear effect in such a geometry. Our results provide the framework for the implementation of new kind experiments aimed at realizing and investigating a phononic tsunami phenomenon in relevant materials.

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Yuriy Yerin, Andrey Varlamov, Claudia Fasolato, Francesco Sacchetti, Paolo Postorino, Caterina Petrillo. 2021-12-14. Possible realization of a phononic tsunami in a wedge-shaped sample. https://doi.org/10.1103/physrevb.104.224110

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