A Monte Carlo study of dislocation growth and etching of crystals

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Cuppen, H.M. and Veenendaal van, E. and Suchtelen van, J. and Enckevort van, W.J.P. and Vlieg, E. (2000) A Monte Carlo study of dislocation growth and etching of crystals. Journal of Crystal Growth, 219 (1-2). pp. 165-175. ISSN 0022-0248

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Abstract:It is well known that screw dislocations are step sources that allow crystals to grow at low driving forces. Growth is accelerated at the outcrop of a screw dislocation generating a spiral hillock. This makes the intersection of a screw dislocation and a crystal surface a so-called velocity source. In this paper the interaction between dislocation growth, 2D-nucleation and misorientation step flow is investigated for a wide range of driving forces by means of Monte Carlo simulations of growth of the Kossel (1 0 0) surface. The interactions between the different growth mechanisms are shown to agree with a general model for velocity source behavior, which allows for a simple analytical expression of the growth rate. This expression can be used in a continuum description of crystal growth. Finally, dislocation etching is studied and compared with dislocation growth.
Item Type:Article
Copyright:© 2000 Elsevier
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Link to this item:http://purl.utwente.nl/publications/74374
Official URL:http://dx.doi.org/10.1016/S0022-0248(00)00612-6
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