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Simulation of surfactant effect on growth of metal homoexpitaxial Sb－Ag/Ag(111) |
| Wu Li-Li(吴黎黎)† and Wu Feng-Min(吴锋民) |
| College of Mathematics and Physics, Information Engineering, Zhejiang Normal University, Jinhua 321004, China |
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Abstract A kinetic Monte Carlo simulation is performed in order to study the effect of Sb atoms as a surfactant on the growth of Ag on Ag(111). In our model the repulsive mechanism in which the surfactant Sb atoms repel diffusing Ag adatoms, and the exchange mechanism between Ag and Sb atoms, are considered. Our simulations show that the effects of Sb atoms for Ag/Ag(111) growth system are mainly to increase the chances for Ag atoms to overcome the Ehrlich--Schwoebel barrier both in the interlayer growth and along the edge diffusion. The influence of the coverage of Sb atoms and substrate temperature on the growth of Ag/Sb/Ag(111) is discussed.
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Received: 01 September 2009
Accepted manuscript online:
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PACS:
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68.43.De
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(Statistical mechanics of adsorbates)
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68.55.A-
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(Nucleation and growth)
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61.43.Bn
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(Structural modeling: serial-addition models, computer simulation)
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68.35.B-
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(Structure of clean surfaces (and surface reconstruction))
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| Fund: Project supported by the Natural
Science Foundation for Young Scientists of Zhejiang Province of
China (Grant No.~RC02069). |
Cite this article:
Wu Li-Li(吴黎黎) and Wu Feng-Min(吴锋民) Simulation of surfactant effect on growth of metal homoexpitaxial Sb－Ag/Ag(111) 2010 Chin. Phys. B 19 066801
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