Suppressed Compressibility at Large Scale in Jammed Packings of Size-Disperse Spheres

被引：79

作者：

Berthier, Ludovic ^{[1
,2
]}

Chaudhuri, Pinaki ^{[3
]}

Coulais, Corentin ^{[4
]}

Dauchot, Olivier ^{[4
]}

Sollich, Peter ^{[5
]}

机构：

[1] CNRS, UMR 5221, Lab Charles Coulomb, Montpellier, France

[2] Univ Montpellier 2, Montpellier, France

[3] Univ Lyon 1, Lab PMCN, UMR CNRS 5586, F-69622 Villeurbanne, France

[4] CEA Saclay, URA CNRS 2464, Serv Phys Etat Condense, F-91191 Gif Sur Yvette, France

[5] Kings Coll London, Dept Math, London WC2R 2LS, England

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 106卷 / 12期

关键词：

D O I：

10.1103/PhysRevLett.106.120601

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We analyze the large-scale structure and fluctuations of jammed packings of size-disperse spheres, produced in a granular experiment as well as numerically. While the structure factor of the packings reveals no unusual behavior for small wave vectors, the compressibility displays an anomalous linear dependence at low wave vectors and vanishes when q -> 0. We show that such behavior occurs because jammed packings of size-disperse spheres have no bulk fluctuations of the volume fraction and are thus hyperuniform, a property not observed experimentally before. Our results apply to arbitrary particle size distributions. For continuous distributions, we derive a perturbative expression for the compressibility that is accurate for polydispersity up to about 30%.

引用

页数：4

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