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Chinese Physics, 2001, Vol. 10(1): 46-51    DOI: 10.1088/1009-1963/10/1/311
CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES Prev   Next  

MULTIPLE CLUSTER GROWTH OF ULTRA-THIN FILMS WITH ANISOTROPIC EDGE DIFFUSION

Wang Dai-mu (王戴木)a, Wu Zi-qin (吴自勤)b 
a Department of Physics, Fuyang Teachers College, Fuyang 236032, China; b Department of Astronomy and Applied Physics, University of Science and Technology of China, Hefei 230026, China
Abstract  The multiple cluster growth of ultra-thin films on a hexagonal substrate with fractal, dendritic and compact morphology has been studied by computer simulation. The influence of the different diffusion processes along island edges on the island shape has been investigated. The results show that the anisotropic corner diffusion induces the dendritic growth, and the anisotropic step diffusion can promote the anisotropic growth and cause the ramified islands growing in three directions. In the case of compact growth, the island shape is mainly determined by the anisotropic corner crossing process. The nonuniform distribution of the multiple cluster formation can be described quantitatively by multifractal. With patterns changing from fractal to compact islands, the width and height of the bell-like or hook-like multifractal spectra increase, while the top f($\alpha$) decreases.
Keywords:  thin film growth      computer simulation      multifractal  
Received:  24 May 2000      Accepted manuscript online: 
PACS:  68.70.+w (Whiskers and dendrites (growth, structure, and nonelectronic properties))  
  68.55.Ac  
  68.90.+g (Other topics in structure, and nonelectronic properties of surfaces and interfaces; thin films and low-dimensional structures)  
  68.55.Jk  
  66.30.-h (Diffusion in solids)  
Fund: Project supported by the Natural Science Foundation of Auhui Province, China (Grant No. 99047217).

Cite this article: 

Wang Dai-mu (王戴木), Wu Zi-qin (吴自勤) MULTIPLE CLUSTER GROWTH OF ULTRA-THIN FILMS WITH ANISOTROPIC EDGE DIFFUSION 2001 Chinese Physics 10 46

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