Quasi-localized vibrational modes, boson peak and sound attenuation in model mass-spring networks
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...
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| Main Authors: | , |
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| 格式: | Article |
| 語言: | English |
| 出版: |
2024
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| 主題: | |
| 在線閱讀: | https://hdl.handle.net/10356/173177 |
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| 總結: | 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. |
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