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Ultra-long range correlations of the dynamics of jammed soft matter
- Source :
- Soft Matter, Soft Matter, Royal Society of Chemistry, 2010, 6 (21), pp.5514-5522. ⟨10.1039/c0sm00155d⟩
- Publication Year :
- 2010
-
Abstract
- We use Photon Correlation Imaging, a recently introduced space-resolved dynamic light scattering method, to investigate the spatial correlation of the dynamics of a variety of jammed and glassy soft materials. Strikingly, we find that in deeply jammed soft materials spatial correlations of the dynamics are quite generally ultra-long ranged, extending up to the system size, orders of magnitude larger than any relevant structural length scale, such as the particle size, or the mesh size for colloidal gel systems. This has to be contrasted with the case of molecular, colloidal and granular ``supercooled'' fluids, where spatial correlations of the dynamics extend over a few particles at most. Our findings suggest that ultra long range spatial correlations in the dynamics of a system are directly related to the origin of elasticity. While solid-like systems with entropic elasticity exhibit very moderate correlations, systems with enthalpic elasticity exhibit ultra-long range correlations due to the effective transmission of strains throughout the contact network.<br />Comment: To appear in Soft Matter
- Subjects :
- Length scale
Spatial correlation
slow dynamics
FOS: Physical sciences
02 engineering and technology
Condensed Matter - Soft Condensed Matter
01 natural sciences
light scattering
Light scattering
Dynamic light scattering
0103 physical sciences
Statistical physics
Soft matter
Elasticity (economics)
010306 general physics
jamming
Physics
Condensed matter physics
PCI
General Chemistry
021001 nanoscience & nanotechnology
Condensed Matter Physics
Condensed Matter::Soft Condensed Matter
Orders of magnitude (time)
Soft Condensed Matter (cond-mat.soft)
Particle size
0210 nano-technology
[PHYS.COND.CM-SCM]Physics [physics]/Condensed Matter [cond-mat]/Soft Condensed Matter [cond-mat.soft]
Subjects
Details
- ISSN :
- 1744683X and 17446848
- Volume :
- 6
- Issue :
- 21
- Database :
- OpenAIRE
- Journal :
- Soft Matter
- Accession number :
- edsair.doi.dedup.....f66526002b3b634614991d4434fa3a45