Anomalous Mobility of Strongly Bound Surface Species: Cl onGaAs(001)−c(8×2) Academic Article uri icon

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abstract

  • Although strongly bound chemisorbates at low coverage readily diffuse on metal surfaces at 300 K, they generally do not diffuse on semiconductor surfaces because of a large corrugation in the adsorbate-surface interaction potential. Chlorine chemisorbed on the Ga-rich GaAs(001)-c(8x2) surface has anomalously fast diffusion even though the chemisorption state is tightly bound and highly specific. Simple Hartree-Fock total energy calculations suggest that this diffusion of strongly bound adsorbates can occur at 300 K because there are multiple nearly degenerate adsorbate sites.

authors

  • McLean, James G
  • Kruse, Peter
  • Guo-Ping, Jiang
  • Ruda, Harry E
  • Kummel, Andrew C

publication date

  • August 14, 2000