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Condensed Matter > Disordered Systems and Neural Networks
Title: Sound attenuation in low temperature amorphous solids is primarily determined by non-affine displacements
(Submitted on 29 Jul 2021 (this version), latest version 31 Mar 2022 (v2))
Abstract: Sound attenuation in low temperature amorphous solids originates from their disordered structure. However, its detailed mechanism is still being debated. Here we analyze sound attenuation starting directly from the microscopic equations of motion. We derive an exact expression for the zero-temperature sound damping coefficient and verify that it agrees with results of earlier sound attenuation simulations. The small wavevector analysis of this expression shows that sound attenuation is primarily determined by the non-affine displacements' contribution to the wave propagation coefficient coming from the frequency shell of the sound wave.
Submission history
From: Grzegorz Szamel [view email][v1] Thu, 29 Jul 2021 18:02:46 GMT (177kb,D)
[v2] Thu, 31 Mar 2022 18:00:15 GMT (237kb,D)
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