Seminars & Lectures
| * TITLE | Monte Carlo study of the honeycomb structure of anthraquinone molecules on Cu(111) | ||||||
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| * DATE / TIME | 2011-11-04, 4:00 p.m. | ||||||
| * PLACE | ECC B155, Ewha Womans Univ., Seoul, Korea | ||||||
| * ABSTRACT | |||||||
| Using Monte Carlo calculations of the two-dimensional triangular lattice gas model, we demonstrate a mechanism for the spontaneous formation of honeycomb structure of anthraquinone (AQ) molecules on a Cu(111) plane. Unlike the suggestion of long-range substrate-mediated repulsion as in Science 313, 961 (2006), long-range attractions play important roles in our calculations. However, the interplay between attractions and repulsions is still integral to the spontaneous formation of AQ\\\\\\\\\\\\\\\'s honeycomb structure. We provide all the possible combinations of long-range attractive coupling constants which form a honeycomb structure. We also provide the critical temperature of disruption of the honeycomb structure and compare the critical local coverage rate of AQ\\\\\\\\\\\\\\\'s where the honeycomb structure starts to form with the experimental observations. | |||||||
