Adatom self-diffusion on Pt (100) surface by an ad-dimer migrating |
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| Authors: | ZHUANG Jun LIU Lei |
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| Affiliation: | Department of Physics, State Key Joint Laboratory for Materials Modification by Laser, Ion and Electron Beams, Fudan University, Shanghai 200433, China |
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| Abstract: | We study the self-diffusion of adatom on Pt(100) surface by molecular dynamics. The metal is modeled by the surface embedded-atom potential. Besides the conventional concerted exchange mechanism, a new exchange mechanism in which an ad-dimer diffuses by a concerted motion of three atoms is observed. The importance is that it could become a dominant diffusion mechanism in some cases. |
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| Keywords: | self-diffusion exchange mechanism metal surface |
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