Heterogeneity and Low-Frequency Vibrations in Bidisperse Sphere Packings

Autor:	Hara, Yusuke, Mizuno, Hideyuki, Ikeda, Atsushi
Rok vydání:	2023
Předmět:	Condensed Matter - Soft Condensed Matter Condensed Matter - Disordered Systems and Neural Networks
Druh dokumentu:	Working Paper
Popis:	In the jamming transition of monodisperse packings, spatial heterogeneity is irrelevant as the transition is described by mean-field theories. Here, we show that this situation drastically changes if the particle-size dispersity is large enough. We use computer simulations to study the structural and vibrational properties of bidisperse sphere packings with a large size ratio. Near the critical point, the small particles tend to form clusters, leading to the emergence of large-scale structural heterogeneity. Concomitantly, the low-frequency vibrations are significantly enhanced compared to those in monodisperse packings, and their density of states follows a linear law with the frequency. We numerically and theoretically demonstrate that these behaviors of the structural heterogeneity and the low-frequency vibrations are intimately connected. The present work suggests that the nature of heterogeneous packings is markedly different from that of homogeneous packings. Comment: 6 pages, 5 figures + 3 pages, 3 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/2311.09509 Zobrazit plný text záznamu View this record from Arxiv