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Anomalous Scaling in Heteroepitaxial Island Dynamics on Ag(100)

MPG-Autoren
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Rieger,  Michael
Theory, Fritz Haber Institute, Max Planck Society;

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Reuter,  Karsten
Theory, Fritz Haber Institute, Max Planck Society;

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e046101.pdf
(Verlagsversion), 513KB

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Zitation

Zaum, C., Rieger, M., Reuter, K., & Morgenstern, K. (2011). Anomalous Scaling in Heteroepitaxial Island Dynamics on Ag(100). Physical Review Letters, 107(4): 046101. doi:10.1103/PhysRevLett.107.046101.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-0012-0CBF-E
Zusammenfassung
Diffusion and decay of alloyed Cu=Ag islands are investigated in the size range from 1 to 40 nm2 on Ag(100) at room temperature with fast-scanning tunneling microscopy and density functional theory. While islands at sizes above 7 nm2 show the diffusion and decay behavior expected for dynamics based on single atom hopping, islands smaller than 4 nm2 diffuse faster and decay slower than predicted by standard theory. This anomalous behavior at unexpected large island sizes is related to a size dependent dealloying of the Cu=Ag islands.