Two-Dimensional Island Shape Determined by Detachment

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dc.creatorSaito, Yukio
dc.creatorKawasaki, Ryo
dc.date2007-05-25
dc.date.accessioned2026-07-07T08:18:53Z
dc.date.available2026-07-07T08:18:53Z
dc.descriptionEffect of an anisotropic detachment on a heteroepitaxial island shape is studied by means of a kinetic Monte Carlo simulation of a square lattice gas model. Only with molecular deposition followed by surface diffusion, islands grow in a ramified dendritic shape, similar to DLA. Introduction of molecular detachment from edges makes islands compact. To understand an anisotropic island shape observed in the experiment of pentacene growth on a hydrogen-terminated Si(111) vicinal surface, asymmetry in detachment around the substrate step is assumed. Edge molecules detach more to the higher terrace than to the lower terrace. The island edge from which molecules are easy to detach is smooth and the one hard to detach is dendritic. If islands are close to each other, islands tend to align in a line, since detached molecules from the smooth edge of the right island are fed to the dendritic and fast growing edge of the left island.
dc.description13 pages, 5 figures
dc.identifierhttps://arxiv.org/abs/0705.3730
dc.identifierhttp://arxiv.org/abs/0705.3730
dc.identifierJ. Phys. Soc. Jpn. 76 (2007) 074604/1-6
dc.identifierdoi:10.1143/JPSJ.76.074604
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/134591
dc.subjectMaterials Science
dc.subjectStatistical Mechanics
dc.titleTwo-Dimensional Island Shape Determined by Detachment
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