期刊
PHYSICAL REVIEW LETTERS
卷 122, 期 21, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.122.215502
关键词
-
资金
- Japan Society for the Promotion of Science (JSPS) [JP25000002, JP18H03675]
- JSPS
- National Natural Science Foundation of China [11734014, 11574278]
We look for inherent structural characteristics hidden behind amorphous solid formation by using zero-temperature jammed packings of frictionless particles as models. Differently from previous geometrical approaches, we introduce a microscopic mechanical or vibrational order parameter Psi, which characterizes the susceptibility of particle motion to infinitesimal thermal excitation. We show that (i) the distribution of Psi has a power-law tail toward high Psi and (ii) the spatial organization of Psi is characterized by a nontrivial scalefree correlation. Both findings (i) and (ii) are regarded as a real-space manifestation of marginal stability due to critical self-organization of jammed packings toward mechanical equilibrium. Furthermore, we find that the power-law exponent of the Psi distribution tail shows a critical-like scaling behavior toward the unjamming transition, which unveils an intriguing interplay between jamming criticality and marginal stability. Our microscopic order parameter provides new structural insights into the marginal stability and instability of jammed packings and may shed light on the important common structural feature of amorphous solids.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据