2000/03/07 by M. Reza Sadr-Lahijany, Sadr-Lahijany, M. Reza, Purusattam Ray +3
Physics and Astronomy · #FOS: Physical sciences #Soft Condensed Matter (cond-mat.soft) #cond-mat.soft
paper · pdf · doi:10.48550/arxiv.cond-mat/0003108
7 pages, 12 figures (eps files included)
arxiv created 2000/03/07 · arxiv updated 2009/11/30
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 ρ≤ 0.9, the solid melts through intermediate states of decreasing hexatic order arising from the proliferation of unbounded dislocations, (ii) for ρ> 0.9, the dislocations form grain boundaries, dividing the system into micro-crystallites and destroying the translational and orientational order.