Anisotropic elasticity of experimental colloidal Wigner crystals

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Anisotropic elasticity of experimental colloidal Wigner crystals.

Colloidal particles interacting via a long-range repulsion can, in contrast to hard-sphere systems, exhibit crystalline ordering at low volume fraction. Here we experimentally investigate the structure and properties of such "colloidal Wigner crystals." We find a body-centered-cubic crystalline phase at volume fractions of ϕ≳15%, which exhibits large fluctuations of individual particles from th...

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Anisotropic elasticity in confocal studies of colloidal crystals.

We consider the theory of fluctuations of a colloidal solid observed in a confocal slice. For a cubic crystal we study the evolution of the projected elastic properties as a function of the anisotropy of the crystal using numerical methods based on the fast Fourier transform. In certain situations of high symmetry we find exact analytic results for the projected fluctuations.

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ژورنال

عنوان ژورنال: Physical Review E

سال: 2015

ISSN: 1539-3755,1550-2376

DOI: 10.1103/physreve.91.032310