Abstract
AbstractThis review is devoted to the mechanisms of a rather strange phenomenon – the step configuration at the vicinal surface of a Si crystal depends on the direction of the electric current through it. This phenomenon opens an easy way to manipulate the surface structure and to create a template for production of ordered arrays of nano-crystals on Si surface. The BCF model is generalized to account for the surface electromigration and the considerations are focused on the step-bunching instability induced by the drift of the adatoms. A simplified form of the equations of step dynamics at a vicinal crystal surface is presented and the results of the linear stability analysis are given. The non-linear effects in the step dynamics are studied in the frame of the continuum model equation and the treatment is restricted to the steady-state shape of the bunches of steps – the self-similarity of the bunch shape and the relation between the width and the height of the bunch. The scaling relations for the shape of the bunches opened a pathway for a number of interesting experiments, which are briefly described.KeywordsDrift VelocitySurface DiffusionLinear Stability AnalysisStep MotionVicinal SurfaceThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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