Journal
SOLID STATE COMMUNICATIONS
Volume 159, Issue -, Pages 60-64Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ssc.2013.01.024
Keywords
Defects in crystals; Colloid; Point defects; Formation and annealing
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Funding
- National Natural Science Foundation of China [10975063]
- Fundamental Research Funds for the Central Universities [lzujbky-2012-17]
- Program for New Century Excellent Talents in University [NCET-11-0206]
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We investigate the interaction energy between two defects with different topological configurations in two-dimensional colloidal crystal using Brownian dynamics simulations with Yukawa pair potential. We observed that repulsive interactions exist for three vacancy-vacancy (approximately 15% probability) and four interstitial-interstitial (approximately 7% probability) configurations. Furthermore, considering the occurrence probability of the configuration of defect pairs, it is observed that the average binding energy between two defects is still attractive for both interstitials and vacancies. Based on the displacement of point defects, we qualitatively analyze the ranking of the interaction energies for different pair configurations, which is consistent with the simulation results. (C) 2013 Elsevier Ltd. All rights reserved.
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