Anisotropic Growth of Metal Chains on Anisotropic Substrate

Abstract:

Based on the exchange mechanism of metal islands growth on anisotropic metal surfaces, the growth processes of anisotropic Cu islands on the anisotropic Pd (110) surface are investigated by Monte Carlo simulations with realistic growth model and physical parameters. The anisotropic diffusion and anisotropic sticking of Cu adatoms are included in the simulation model after being considered the anisotropy of Pd (110) surface and compared to the experiments. It is found that the larger diffusion rate along the [110] channels of Pd (110) surface gives rise to a slower growth rate of Cu island in this direction, unless special effect of the anisotropic sticking is invoked. The simulation results show that the shape anisotropy of Cu islands is mainly due to the sticking anisotropy rather than the diffusion anisotropy.

• Periodical: Solid State Phenomena (Volumes 121-123)
• Pages: 1129-1132
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.121-123.1129
• Online since: March 2007
• Authors: Feng Min Wu, Yuh Zhang Fang
• Keywords: Anisotropic Diffusion, Monte-Carlo Simulation, Sticking Coefficient

References

[1] J. A. Venables, G. D. Spiller and M. Hanbucken, Rep. Prog. Phys. 47(1984), 399.

[2] Z. Y. Zhang, X. Chen and M. G. Lagally, Phys. Rev. Lett., 73(1994), 1829.

[3] Z. Y. Zhang and M. G. Lagally, Science, 276(1997), 377.

[4] B. Fischer, H. Brune, J. V. Barth et al., Phys. Rev. Lett., 82(1999), 1732.

[5] C. Ebner, K. -B. Park, J. -F. Nielsen et al., Phys. Rev. 68B(2003), 245404.

[6] D. V. Tsivlin, V. S. Stepanyuk, W. Hergert et al., Phys. Rev. 68B(2003), 205411.

[7] Y. -W. Mo, J. Kleiner, M. B. Webb et al., Phys. Rev. Lett., 66(1991), (1998).

[8] H. Roder, E. Hahn and H. Brune et al., Nature, 366(1993), 141.

[9] Y. G. Li, M. C. Bartelt, J. W. Evans et al, Phys Rev, 56B(1997), 12539.

[10] H. Metiu, Y. -T. Lu and Z. Zhang, Science 255(1992), 1088.

[11] C. Pearson, M. Krueger and E. Ganz, Phys. Rev. Lett., 76(1996), 2306.

[12] J. P. Bucher, E. Hahn, P. F. ernandez et al, Europhys Lett, 27(1994), 473.