SciPost Submission Page
Quasi-localized vibrational modes, Boson peak and sound attenuation in model mass-spring networks
by Shivam Mahajan, Massimo Pica Ciamarra
Submission summary
| Authors (as registered SciPost users): | Massimo Pica Ciamarra |
| Submission information | |
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| Preprint Link: | https://arxiv.org/abs/2211.01137v4 (pdf) |
| Date accepted: | June 15, 2023 |
| Date submitted: | April 17, 2023, 3:04 a.m. |
| Submitted by: | Massimo Pica Ciamarra |
| Submitted to: | SciPost Physics |
| Ontological classification | |
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| Academic field: | Physics |
| Specialties: |
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| Approaches: | Theoretical, Computational |
Abstract
We introduce an algorithm that constructs disordered mass-spring networks whose elastic properties mimic that of glasses by tuning the fluctuations of the local elastic properties, keeping fixed connectivity and controlling the prestress. In two dimensions, the algorithm reproduces the dependence of gasses' vibrational properties, such as quasi-localised vibrational modes and Boson peak, on the degree of stability. The sound attenuation displays Rayleigh scattering and disorder-broadening regimes at different frequencies, and the attenuation rate increases with increased stability. Our results establish a strong connection between the vibrational features of disordered solids and the fluctuations of the local elastic properties and provide a new approach to investigating glasses' vibrational anomalies.
Author comments upon resubmission
Published as SciPost Phys. 15, 069 (2023)