Low-Frequency Vibrations of Soft Colloidal Glasses
Authors:
- Wouter G. EllenbroekWEWouter G. Ellenbroek
- Zexin ZhangZZZexin Zhang
- Daniel T. N. ChenDCDaniel T. N. Chen
- Peter J. YunkerPYPeter J. Yunker
- Silke HenkesSHSilke Henkes
- Carolina BritoCBCarolina Brito
- Olivier DauchotODOlivier Dauchot
- Wim van SaarloosWSWim van Saarloos
- Andrea J. LiuALAndrea J. Liu
- A. G. YodhAYA. G. Yodh
Open Access
- 9 July 2010
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 105 (2) , 025501
Abstract
We conduct experiments on two-dimensional packings of colloidal thermosensitive hydrogel particles whose packing fraction can be tuned above the jamming transition by varying the temperature. By measuring displacement correlations between particles, we extract the vibrational properties of a corresponding ``shadow'' system with the same configuration and interactions, but for which the dynamics of the particles are undamped. The vibrational properties are very similar to those predicted for zero-temperature sphere packings and found in atomic and molecular glasses; there is a boson peak at low frequency that shifts to higher frequency as the system is compressed above the jamming transition.Keywords
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This publication has 23 references indexed in Scilit:
- Anharmonic and quasi-localized vibrations in jammed solids—Modes for mechanical failureEurophysics Letters, 2010
- Energy Transport in Jammed Sphere PackingsPhysical Review Letters, 2009
- Geometric origin of excess low-frequency vibrational modes in weakly connected amorphous solidsEurophysics Letters, 2005
- Vibrations and Diverging Length Scales Near the Unjamming TransitionPhysical Review Letters, 2005
- On the rigidity of amorphous solidsAnnales de Physique, 2005
- Network Rigidity and Properties ofandGlasses under PressurePhysical Review Letters, 2004
- Jamming at zero temperature and zero applied stress: The epitome of disorderPhysical Review E, 2003
- Low-temperature thermal conductivity and acoustic attenuation in amorphous solidsReviews of Modern Physics, 2002
- Density dependence of the boson peak of vitreous silicaPhysica B: Condensed Matter, 2000
- Medium-Range Order in Permanently DensifiedandGlassPhysical Review Letters, 1996