Phonons in an Entropic Crystal
- 14 August 2000
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 85 (7), 1460-1463
- https://doi.org/10.1103/physrevlett.85.1460
Abstract
Hard spheres crystallize due to purely entropic forces. The underlying excluded-volume interaction is completely anharmonic and the nature of the phonon spectrum is therefore of interest. To measure the single-particle motion and the phonon spectrum by dynamic light scattering we have used a collection of novel techniques including multispeckle cross correlation on a CCD chip and the growth of large single crystals using a temperature gradient. The random hexagonal close packed crystal has a dispersion relation closer to hcp than to fcc.Keywords
This publication has 19 references indexed in Scilit:
- Modes of Motion of a Colloidal CrystalPhysical Review Letters, 1998
- Classical growth of hard-sphere colloidal crystalsPhysical Review E, 1995
- Linear Viscoelasticity of Colloidal Hard Sphere Suspensions near the Glass TransitionPhysical Review Letters, 1995
- The glass transition of colloidal polystyrene micronetwork spheres — a dynamic light scattering studyJournal of Non-Crystalline Solids, 1994
- Glass transition in colloidal hard spheres: Measurement and mode-coupling-theory analysis of the coherent intermediate scattering functionPhysical Review E, 1994
- Hydrodynamics of colloidal crystalsPhysical Review A, 1992
- Elastic constants of hard-sphere crystalsPhysical Review Letters, 1987
- Modelling of porous media by renormalization of the Stokes equationsJournal of Fluid Mechanics, 1985
- Lattice dynamics of colloidal crystalsPhysical Review A, 1982
- A study of some of the rheological properties of concentrated polystyrene laticesAdvances in Colloid and Interface Science, 1982