Profile of a decaying crystalline cone

Article

关键词: PERIODIC SURFACE PROFILES;    MORPHOLOGICAL EQUILIBRATION;    ROUGHENING TRANSITION;    LOW-TEMPERATURE;    DYNAMICS;    RELAXATION;    DIFFUSION;    GRATINGS;    GROOVES;    SI(001);   

DOI  :  10.1103/PhysRevB.60.5946

来源: SCIE

【 摘 要 】

The decay of a crystalline cone below the roughening transition is studied. We consider local mass transport through surface diffusion, focusing an the two cases of diffusion limited and attachment-detachment limited step kinetics. In both cases, we describe the decay kinetics in terms of step-flow models. Numerical simulations of the models indicate that in the attachment-detachment limited case the system undergoes a step-bunching instability if the repulsive interactions between steps are weak. Such an instability does not occur in the diffusion limited case. In stable cases the height profile, h(r,t), is flat at radii r

【 授权许可】

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