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Phonons in colloidal crystals

2002; Institute of Physics; Volume: 58; Issue: 5 Linguagem: Inglês

10.1209/epl/i2002-00322-3

1286-4854

R. S. Penciu, Maria Kafesaki, G. Fytas, E. N. Economou, W. Steffen, Andrew D. Hollingsworth, William B. Russel,

Noise Effects and Management

The dispersion curves of the phonons propagating in polycrystalline suspensions of hard-sphere colloids are measured by Brillouin scattering and calculated by band structure techniques. Acoustic-like and optical-like experimental phonon dispersion relations are attributed to the interplay of the solvent matrix mode with the single-sphere vibration eigenmodes in these lattice structures.