%0 Journal Article
%T Suppressed Compressibility at Large Scale in Jammed Packings of Size-Disperse Spheres
%+ Laboratoire des colloïdes, verres et nanomatériaux (LCVN)
%+ Laboratoire de Physique de la Matière Condensée et Nanostructures (LPMCN)
%+ Service de physique de l'état condensé (SPEC - UMR3680)
%+ King‘s College London
%A Berthier, Ludovic
%A Chaudhuri, Pinaki
%A Coulais, Corentin
%A Dauchot, Olivier
%A Sollich, Peter
%Z 4 pages; 2 figures
%< avec comité de lecture
%Z L2C:10-016
%@ 0031-9007
%J Physical Review Letters
%I American Physical Society
%V 106
%P 120601
%8 2011-03-21
%D 2011
%Z 1008.2899
%R 10.1103/PhysRevLett.106.120601
%Z Physics [physics]/Condensed Matter [cond-mat]/Statistical Mechanics [cond-mat.stat-mech]Journal articles
%X We analyze the large scale structure and fluctuations of jammed packings of polydisperse spheres produced both numerically and in a granular experiment. While the structure factors of the packings reveal no unusual behavior for small wavevectors, the compressibility displays an anomalous linear dependence at low wavectors and vanishes when q -> 0. Our results apply to arbitrary particle size distributions. For continuous distributions, we derive simple perturbative approximations for the compressibility that are accurate for polydispersity up to about 30%. We show that the compressibility vanishes because jammed packings of polydisperse spheres have no bulk fluctuations of the volume fraction and are thus hyperuniform, a property not observed experimentally before.
%G English
%L hal-00597228
%U https://hal.science/hal-00597228
%~ CEA
%~ CNRS
%~ UNIV-LYON1
%~ UNIV-MONTP2
%~ LCVN
%~ IRAMIS-SPEC
%~ UNIV-MONTPELLIER
%~ UDL
%~ UNIV-LYON
%~ IRAMIS
%~ GS-PHYSIQUE
%~ UM1-UM2