The migration of a Si atom adsorbed on the Si(100)-2 × 1 surface

Lu Yan-Ten, Zhang Zhenyu, Metiu Horia

研究成果: Article

38 引文 斯高帕斯(Scopus)

摘要

We use the Stillinger-Weber potential to examine the migration of a Si atom adsorbed on Si(100)-2 × 1 surface. The adsorption sites and the barriers between them are determined by energy minimization and used to estimate the rates of the site to site hopping. A stochastic kinetic simulation uses these rates to determine how the adsorbed atom migrates on the surface. We find that the mobility is highly anisotropic and that the motion is quasi one-dimensional. The particle diffuses along the dimer row and then it gets trapped on sites located between the dimers. The activation energy for the diffusion constant is a complicated function of the energy barriers separating the surface sites and the pre-exponential factor may have unusual values.

原文English
頁(從 - 到)199-209
頁數11
期刊Surface Science
257
發行號1-3
DOIs
出版狀態Published - 1991 十一月 1

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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