期刊
SOFT MATTER
卷 12, 期 4, 页码 1248-1255出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5sm02575c
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资金
- NSF [DMR-1255370]
- Major Research Instrumentation grant, Office of Cyber Infrastructure [OCI-0960354]
- Direct For Mathematical & Physical Scien
- Division Of Materials Research [1255370] Funding Source: National Science Foundation
A jammed packing of frictionless spheres at zero temperature is perfectly specified by the network of contact forces from which mechanical properties can be derived. However, we can alternatively consider a packing as a geometric structure, characterized by a Voronoi tessellation which encodes the local environment around each particle. We find that this local environment characterizes systems both above and below jamming and changes markedly at the transition. A variety of order parameters derived from this tessellation carry signatures of the jamming transition, complete with scaling exponents. Furthermore, we define a real space geometric correlation function which also displays a signature of jamming. Taken together, these results demonstrate the validity and usefulness of a purely geometric approach to jamming.
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