Study of Surface Diffusion through Langevin Dynamics

  • S. C. Ying
Part of the NATO ASI Series book series (NSSB, volume 360)


We present here results from theoretical investigations of adatom diffusion based on Langevin dynamics. We derive a generalized Langevin equation from a microscopic Hamiltonian and discuss its application to the study of surface diffusion. In particular, we focus on how the diffusion constant depends on the friction parameter characterizing the non-adiabatic coupling of the adatom to the substrate excitations. We discuss such topics as the validity of the transition state theory, occurrences of long jumps and memory effects in determining the prefactor and the barrier for surface diffusion.


Saddle Point Memory Effect Surface Diffusion Memory Function Diffusion Constant 
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Copyright information

© Springer Science+Business Media New York 1997

Authors and Affiliations

  • S. C. Ying
    • 1
  1. 1.Physics DepartmentBrown UniversityProvidenceUSA

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