Ordering and Melting in Colloidal Molecular Crystal Mixtures
C. Reichhardt, C.J. Olson Reichhardt
TL;DR
This paper uses simulations to explore complex ordering and melting behaviors in colloidal molecular crystal mixtures, revealing novel states like pinwheel and star configurations, with diverse melting transitions and coexistence phenomena.
Contribution
It introduces new types of ordered states and melting behaviors in colloidal mixtures at rational ratios, expanding understanding of colloidal self-assembly.
Findings
Discovery of pinwheel and star ordered states
Observation of multi-step melting transitions
Identification of coexistence of ordered and disordered species
Abstract
We show in simulations that a rich variety of novel orderings such as pinwheel and star states can be realized for colloidal molecular crystal mixtures at rational ratios of the number of colloids to the number of minima from an underlying periodic substrate. These states can have multi-step melting transitions and also show coexistence in which one species disorders while the other species remains orientationally disordered. For other mixtures, only partially ordered or frustrated states form.
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