Low-frequency vibrations of soft colloidal glasses

Ke Chen, Wouter G. Ellenbroek, Zexin Zhang, Daniel T. N. Chen, Peter J. Yunker, Silke Henkes, Carolina Brito, Olivier Dauchot, Wim van Saarloos, Andrea J. Liu, A. G. Yodh

Research output: Contribution to journalArticle

128 Citations (Scopus)

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.

Original languageEnglish
Article number025501
Number of pages4
JournalPhysical Review Letters
Volume105
Issue number2
DOIs
Publication statusPublished - 9 Jul 2010

Cite this

Chen, K., Ellenbroek, W. G., Zhang, Z., Chen, D. T. N., Yunker, P. J., Henkes, S., Brito, C., Dauchot, O., van Saarloos, W., Liu, A. J., & Yodh, A. G. (2010). Low-frequency vibrations of soft colloidal glasses. Physical Review Letters, 105(2), [025501]. https://doi.org/10.1103/PhysRevLett.105.025501