Low-density crystals in charged colloids : Comparison with Yukawa theory
arXiv:1501.01795 · doi:10.1002/ctpp.201400099
Abstract
Charged colloids can behave as Yukawa systems, with similar phase behaviour. Using particle- resolved studies, we consider a system with an unusually long Debye screening length which forms crystals at low colloid volume fraction ϕ ~ 0.01. We quantitatively compare this system with the Yukawa model and find that its freezing point is compatible with the theoretical prediction but that the crystal polymorph is not always that expected. In particular we find body-centred cubic crystals where face-centred cubic crystals are expected.
arXiv commentTo appear in the special issue of Contributions to Plasma Physics for Strongly Coupled Coulomb Systems 2014
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- Brownian Dynamics of Fully Confined Suspensions of Rigid Particles Without Green's Functions
- Long-Lived Non-Equilibrium Interstitial-Solid-Solutions in Binary Mixtures
- Electrostatic energy and phonon properties of Yukawa crystals