Melting properties of two-dimensional multi-species colloidal systems in a parabolic trap |
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Authors: | W Yang K Nelissen M H Kong Y T Li Y M Tian |
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Institution: | (1) Institute for Microstructural Sciences, National Research Council of Canada, Ottawa, Ontario K1A 0R6, Canada, |
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Abstract: | The angular and radial melting properties of two-dimensional classical systems consisting
of different types of particles confined in a parabolic trap are studied through modified
Monte Carlo simulations. A universal behavior of the angular melting process is found,
which occurs in multiple steps due to shell depended melting temperatures. The melting
sequence of the different shells is determined by two major factors: (1) the confinement
strength which each shell is subjected to, and (2) the specific structure of each shell.
Further, a continuous radial disordering of the particle types forming a single circular
shell is found and analyzed. This phenomenon has never been observed before in
two-dimensional mono-dispersive systems. This continuous radial disordering results from
the high energy barrier between different particle types in multi-species systems. |
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