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Kinetic Coefficients in a System Far from Equilibrium

  • Paolo Politi
  • Jacques Villain
Part of the NATO ASI Series book series (NSSB, volume 360)

Abstract

The kinetic coefficients in a growing surface are very different from their equilibrium values. Assuming deposition of particles from a beam on an initially flat surface of high symmetry orientation and neglecting evaporation, the kinetic coefficients K 0 and λ0 relevant at the beginning of the growth are evaluated in 1+1 and 2+1 dimensions. K 0 is the sum of three terms: i) a term coming from an “equilibrium” chemical potential, which vanishes with temperature but diverges at low flux in the case of a singular surface; ii) a term, whose origin is the random character of nucleation, which depends only on the beam intensity and the diffusion constant but is independent of the atomic distance; iii) a term deriving from the fluctuations of the diffusion current, which depends on the beam intensity, the diffusion length, and the atomic distance and, in 1+1 dimensions, only depends on the temperature through the diffusion length. The validity of a linear equation is limited to small slopes |m| < 1/ℓ c , where ℓ c is the maximum terrace width.

Keywords

Beam Intensity Free Energy Density Atomic Distance Kinetic Coefficient Small Slope 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 1997

Authors and Affiliations

  • Paolo Politi
    • 1
  • Jacques Villain
    • 2
  1. 1.Département de Recherche Fondamentale sur la Matière Condensée, SPMM/MPCEAGrenoble Cedex 9France
  2. 2.Département de Recherche Fondamentale sur la Matière Condensée, SPSMSCEAGrenoble Cedex 9France

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