Monatomic to biatomic step transition during epitaxial growth by step flow |
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| Institution: | 1. Guy’s and St. Thomas’ NHS Foundation Trust, London, UK;2. Cambridge University Hospitals, Hills Road, Cambridge, UK;3. Klinikum Friedrichshafen GmbH, Friedrichshafen, Germany;4. Vascular Care Connecticut, Darian, CT, USA;5. Ohio Health, Columbus, OH, USA;6. Cook Medical, Bloomington, IN, USA;7. Stanford Medicine, Stanford, CA, USA;1. State Key Laboratory of Solidification Processing, MIIT Key Laboratory of Radiation Detection Materials and Devices, NPU-QMUL Joint Research Institute of Advanced Materials and Structure, USI Institute of Intelligence Materials and Structure, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an 710072, China;2. Department of Orthopedic Trauma, Honghui Hospital of Xi’an Jiaotong University, Xi’an 710054, China;3. Queen Mary University of London Engineering School, Northwestern Polytechnical University, Xi’an 710072, China;1. Department of Biological Sciences, Vanderbilt University, Nashville, TN 37232, USA;2. Center for Structural Biology, Vanderbilt University, Nashville, TN 37232, USA;3. National Resource for Automated Molecular Microscopy, New York Structural Biology Center, New York, NY 10027, USA;4. Department of Molecular Physiology & Biophysics, Vanderbilt University, Nashville, TN 37212, USA;5. Department of Biochemistry, Vanderbilt University, Nashville, TN 37205, USA;1. University of Lorraine, LERMAB - EA 4370, 27 rue Philippe Séguin, CS 60036, F-88026 Epinal, France;2. University of Lorraine, Institut Jean Lamour - UMR CNRS 7198, 27 rue Philippe Séguin, CS 60036, F-88026 Epinal Cedex, France;3. AgroParisTech, LERFoB - UMR1092, 14 rue Girardet, F-54042 Nancy Cedex, France |
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| Abstract: | We consider the transition of a two domain vicinal surface composed of alternating terraces having 1 × 2 and 2 × 1 reconstructions and separated by A and B steps to a single domain, 2 × 1 vicinal surface with biatomic steps. The sticking coefficients for the rougher B steps are greater on either side of the step than the corresponding A step sticking coefficients and this is shown to provide the kinetic mechanism for a transition to a single domain surface even when the diffusion coefficients on the two kinds of terraces are markedly different. We also determine the explicit time dependence for the terrace widths, which is of a trancendental form. |
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