Unified continuum approach to crystal surface morphological relaxation

Article

关键词: SELF-DIFFUSION;    STEPS;    ENERGETICS;    EVOLUTION;    PROFILE;    DECAY;   

DOI  :  10.1103/PhysRevB.76.193403

来源: SCIE

【 摘 要 】

A continuum theory is used to predict scaling laws for the morphological relaxation of crystal surfaces in two independent space dimensions. Our goal is to unify previously disconnected experimental observations of decaying surface profiles. The continuum description is derived from the motion of interacting atomic steps. For isotropic diffusion of adatoms across each terrace, induced adatom fluxes transverse and parallel to step edges obey different laws, yielding a tensor mobility for the continuum surface flux. The partial differential equation for the height profile expresses an interplay of step energetics and kinetics, and aspect ratio of surface topography that plausibly unifies observations of decaying bidirectional surface corrugations.

【 授权许可】

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