Department of Physics Papers

Document Type

Journal Article

Date of this Version

7-9-2010

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 zerotemperature 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.

Comments

Suggested Citation:
Ellenbroek, W.G., Z. Zhang, D.T.N. Chen, P.J. Yunker, et. al. (2010). "Low-Frequency Vibrations of Soft Colloidal Glasses." Physical Review Letters. 105, 025501.

© The American Physical Society
http://dx.doi.org/10.1003/PhysRevLett.105.025501

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Date Posted: 08 November 2010

This document has been peer reviewed.