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Intermixing of Intrabasin and Interbasin Diffusion of a Single Ag Atom on Si(111)-(7×7)

Authors Wang, Kedong
Chen, Gang
Zhang, Chun
Loy, M. M. T.
Xiao, Xudong
Issue Date 2008
Source Physical Review Letters , v. 101, (26), 2008, DEC 31, article number 266107
Summary Using scanning tunneling microscopy, we studied the diffusion of single Ag atoms within the Si(111)-(7x7) unit cell. A striking difference was observed in the time-dependent tunneling current spectra for Ag atoms moving in the unfaulted and faulted half unit cells, with a dual-time characteristic in the former but a single time in the latter. Our observations demonstrate the importance of the stacking fault in affecting the interaction between Ag atoms and the Si(111)-(7x7) surface and can be understood in terms of an asymmetric interplay between intrabasin and interbasin diffusion.
ISSN 0031-9007
Rights Physical Review Letters © Copyright 2008 American Physical Society. The Journal's web site is located at
Language English
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