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Three-dimensional Ehrlich-Schwoebel Barriers of W
Department of Mechanical, Aerospace and Nuclear Engineering,Rensselaer Polytechnic Institute, Troy, NY 12180
Department of Chemical and Biological Engineering, RensselaerPolytechnic Institute, Troy, NY 12180
Correspondence author, email: hanchen@rpi.edu
Computers, Materials & Continua 2006, 3(1), 43-48. https://doi.org/10.3970/cmc.2007.003.043
Abstract
Recent studies show that three-dimensional Ehrlich-Schwoebel (3D ES), or facet-facet, barriers of face-centered-cubic metals are substantially higher than other surface diffusion barriers. This paper presents the numerical results of 3D ES barriers for body-centered-cubic W, using classical molecular statics calculations and the nudged elastic band method. Results show that an adatom on W{110} has a diffusion barrier of 0.49 eV on the flat surface, 0.66 eV over a monolayer step, and 0.98 eV over a ridge to a neighboring {100} facet, which is one 3D ES barrier.Keywords
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