-
- A. R. Bausch
- Department of Physics, E22, Technische Universität München, 85747 München, Germany.
-
- M. J. Bowick
- Physics Department, Syracuse University, Syracuse, NY 13244–1130, USA.
-
- A. Cacciuto
- Fundamenteel Onderzoek der Materie Institute for Atomic and Molecular Physics, Kruislaan 407, 1098 SJ, Amsterdam, The Netherlands.
-
- A. D. Dinsmore
- Department of Physics, University of Massachusetts, Amherst, MA 01003–4525, USA.
-
- M. F. Hsu
- Department of Physics and Division of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA.
-
- D. R. Nelson
- Department of Physics and Division of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA.
-
- M. G. Nikolaides
- Department of Physics, E22, Technische Universität München, 85747 München, Germany.
-
- A. Travesset
- Physics and Astronomy Department, Iowa State University, and Ames National Laboratory, Ames, IA 50011, USA.
-
- D. A. Weitz
- Department of Physics and Division of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA.
説明
<jats:p>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.</jats:p>
収録刊行物
-
- Science
-
Science 299 (5613), 1716-1718, 2003-03-14
American Association for the Advancement of Science (AAAS)