Low energy modes and Debye behaviour in a colloidal crystal
Soft Condensed Matter
2011-02-22 v1 Materials Science
Abstract
We study the vibrational spectrum and the low energy modes of a three dimensional colloidal crystal using confocal microscopy. This is done in a two-dimensional cut through a three-dimensional crystal. We find that the observed density of states is incompatible with the standard Debye form in either two or three dimensions. These results are confirmed by numerical simulations. We show that an effective theory for the projections of the modes onto the two-dimensional cut describes the experimental and simulation data in a satisfactory way.
Cite
@article{arxiv.1102.4271,
title = {Low energy modes and Debye behaviour in a colloidal crystal},
author = {Antina Ghosh and Romain Mari and V. K. Chikkkadi and Peter Schall and A. C Maggs and Daniel Bonn},
journal= {arXiv preprint arXiv:1102.4271},
year = {2011}
}
Comments
accepted for publication in Physica A