2024/01/17 by Shivam Mahajan, Mahajan, Shivam, Massimo Pica Ciamarra +1 · 1 citation
Engineering · Materials Science · Physics and Astronomy · #Adhesion, Friction, and Surface Interactions #FOS: Physical sciences #Material Dynamics and Properties #Random lasers and scattering media #Soft Condensed Matter (cond-mat.soft)
paper · pdf · doi:10.48550/arxiv.2401.08918
openalex publication_date 2024/01/17 · openalex created_date 2024/01/19 · openalex updated_date 2026/07/28
Sound waves are attenuated as they propagate in amorphous materials. We investigate the mechanism driving sound attenuation in the Rayleigh scattering regime by resolving the dynamics of an excited phonon in time and space via numerical simulations. We find sound attenuation is spatiotemporal heterogeneous. It starts in localised regions, which identify soft regions within the material and correlate with low-frequency vibrational modes. As time progresses, the regions where sound is primarily attenuated invade the system via an apparent diffusive process.