Quasi-localized vibrational modes, Boson peak and sound attenuation in model mass-spring networks

Autor:	Mahajan, Shivam, Ciamarra, Massimo Pica
Rok vydání:	2022
Předmět:	Condensed Matter - Disordered Systems and Neural Networks Condensed Matter - Materials Science Condensed Matter - Soft Condensed Matter Condensed Matter - Statistical Mechanics
Zdroj:	SciPost Phys. 15, 069 (2023)
Druh dokumentu:	Working Paper
DOI:	10.21468/SciPostPhys.15.2.069
Popis:	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. Comment: Submission to SciPost
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2211.01137 Zobrazit plný text záznamu View this record from Arxiv