Grain Boundary Scars and Spherical Crystallography

Details Grain Boundary Scars and Spherical Crystallography Grain Boundary Scars and Spherical Crystallography

2003-03-15

arxiv.org/abs/cond-mat/0303289v1

Science 299 (2003) 1716

Physics

Condensed Matter

Soft Condensed Matter

4 pages, 3 eps figs (high quality images available from Mark Bowick)

Scientific paper

10.1126/science.1081160

We describe experimental investigations of the structure of two-dimensional spherical crystals. The crystals, formed by beads self-assembled on water droplets in oil, serve as model systems for exploring very general theories about the minimum energy configurations of particles with arbitrary repulsive interactions on curved surfaces. Above a critical system size we find that crystals develop distinctive high-angle grain boundaries, or scars, not found in planar crystals. The number of excess defects in a scar is shown to grow linearly with the dimensionless system size. The observed slope is expected to be universal, independent of the microscopic potential.

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