Topological Defects in Size-Dispersed Solids

Details Topological Defects in Size-Dispersed Solids Topological Defects in Size-Dispersed Solids

2000-03-07

arxiv.org/abs/cond-mat/0003108v1

Physics

Condensed Matter

Soft Condensed Matter

7 pages, 12 figures (eps files included)

Scientific paper

We study the behavior of the topological defects in the inherent structures of a two-dimensional binary Lennard-Jones system as the size dispersity varies. We find that topological defects arising from the particle size dispersity are responsible for destabilizing the solid as follows: (i) for particle density $\rho \leq 0.9$, the solid melts through intermediate states of decreasing hexatic order arising from the proliferation of unbounded dislocations, (ii) for $\rho > 0.9$, the dislocations form grain boundaries, dividing the system into micro-crystallites and destroying the translational and orientational order.

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