Fast diffusion of a Lennard-Jones cluster on a crystalline surface

被引:110
作者
Deltour, P
Barrat, JL
Jensen, P
机构
[1] Département de Physique des Matériaux, Université Claude Bernard Lyon-1, Villeurbanne, 69622
关键词
D O I
10.1103/PhysRevLett.78.4597
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We present a molecular dynamics study of large Lennard-Jones clusters evolving on a crystalline surface. The static and the dynamic properties of the cluster are described. We find that large clusters can diffuse rapidly, as experimentally observed. The role of the mismatch between the lattice parameters of the cluster and the substrate is emphasized to explain the diffusion of the cluster. This diffusion can be described as a Brownian motion induced by the internal Vibrations of the cluster and/or the vibrations of the substrate, a mechanism that has not been previously considered for cluster diffusion.
引用
收藏
页码:4597 / 4600
页数:4
相关论文
共 17 条
  • [1] Allen M. P., 1987, Computer Simulation of Liquids
  • [2] EXPERIMENTAL-OBSERVATION OF FAST DIFFUSION OF LARGE ANTIMONY CLUSTERS ON GRAPHITE SURFACES
    BARDOTTI, L
    JENSEN, P
    HOAREAU, A
    TREILLEUX, M
    CABAUD, B
    [J]. PHYSICAL REVIEW LETTERS, 1995, 74 (23) : 4694 - 4697
  • [3] BARDOTTI L, 1996, SURF SCI, V367, P267
  • [4] Frenkel D., 1996, UNDERSTANDING MOL SI
  • [5] Magic size effects for heteroepitaxial island diffusion
    Hamilton, JC
    [J]. PHYSICAL REVIEW LETTERS, 1996, 77 (05) : 885 - 888
  • [6] MICROSCOPIC WETTING PHENOMENA
    HAUTMAN, J
    KLEIN, ML
    [J]. PHYSICAL REVIEW LETTERS, 1991, 67 (13) : 1763 - 1766
  • [7] OSCILLATORY BEHAVIOR IN THE SIZE DEPENDENCE OF CLUSTER MOBILITY ON METAL-SURFACES - RH ON RH(100)
    KELLOGG, GL
    [J]. PHYSICAL REVIEW LETTERS, 1994, 73 (13) : 1833 - 1836
  • [8] KERN R, 1979, CURRENT TOPICS MATER, V3, pCH3
  • [9] DIFFUSION OF MONOLAYER ADATOM AND VACANCY CLUSTERS - LANGEVIN ANALYSIS AND MONTE-CARLO SIMULATIONS OF THEIR BROWNIAN-MOTION
    KHARE, SV
    BARTELT, NC
    EINSTEIN, TL
    [J]. PHYSICAL REVIEW LETTERS, 1995, 75 (11) : 2148 - 2151
  • [10] FROM FREE CLUSTERS TO CLUSTER-ASSEMBLED MATERIALS
    MELINON, P
    PAILLARD, V
    DUPUIS, V
    PEREZ, A
    JENSEN, P
    HOAREAU, A
    BROYER, M
    VIALLE, JL
    PELLARIN, M
    BAGUENARD, B
    LERME, J
    [J]. INTERNATIONAL JOURNAL OF MODERN PHYSICS B, 1995, 9 (4-5): : 339 - 397