2D melting of confined colloids with a mixture of square and triangular order
| Autor: | P C N Pereira, R M Jungmann, S. W. S. Apolinario |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Order (ring theory) 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics Finite range 01 natural sciences Stability (probability) Molecular physics Square (algebra) Condensed Matter::Soft Condensed Matter Colloid Colloidal particle 0103 physical sciences Brownian dynamics General Materials Science 010306 general physics 0210 nano-technology Hexatic phase |
| Zdroj: | Journal of Physics: Condensed Matter. 30:465402 |
| ISSN: | 1361-648X 0953-8984 |
| DOI: | 10.1088/1361-648x/aae3c5 |
| Popis: | We implement Brownian dynamics to investigate the melting processes of colloidal particles confined isotropically and interacting via a potential which can be tailored in a repulsive-attractive-respulsive fashion as the interparticle distance increases. The stable configurations of such a system is composed of a large diversity of structures, which includes quasicrystalline, triangular, square, and mixed orderings, as well as the presence of fringes and holes, which are located, respectively, at the border and interior of the clusters. Our simulations demonstrate that during the melting process particles are able to swing between different micro phases. This intermediary stage, present in a finite range of temperature, precedes the melting in all cases investigated and is different from the hexatic phase of the KTNHY framework. We also test the fringes stability and find it to be higher than the one found in compact clusters. Finally, we show that, at the high temperature regime, the system loses its angular ordering while still preserves its radial interparticle confinement, which, ultimately, causes the proliferation of small subclusters. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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