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Evolution of a FIB line scan implantation profile

(Nanowire Ion-Beam-Synthesis, Plateau-Rayleigh-Instability, Ostwald-Ripening)

3D Lattice Kinetic Monte Carlo Simulation



  • evolution of a cylindrical Gaussian FIB implantation profile; it is demonstrated how a supersaturated system with high supersaturation gradients relaxes via
  • phase separation,
  • coarsening,
  • interface smoothing,
  • the transient formation of a nanowire,
  • the Plateau-Rayleigh instability,
  • nanowire fragmentation, and
  • Ostwald ripening towards the
  • equilibrium state.
  • evolution time extends over several orders of magnitude

  • atomic dynamics is based on the conserved-order-parameter Ising model with nearest neighbor (NN) interaction JNN

  • f.c.c. lattice (12NNs; JNN/kTc = 0.40837)

  • here: JNN/kT = 1.5; Natoms = 112'547; FIB implantation profile FWHM = 40a

  • color key: coordination number from pink (monomers) to purple (12NNs)

  • time is measured in Monte Carlo steps (MCS)

  • simulation cell: (128a x 128a x 512a) with periodic boundaries

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    Copyright: Lars Röntzsch, Dresden, GERMANY.