Abstract
Field evaporation of positive and negative ions of Au adatoms from a Au(100) surface and Si adatoms from a T4 site above a Si(111) unreconstructed surface are investigated within the charge exchange model. The atomic potentials for gold were determined using the embedded atom method and a method due to H. Gollisch[Surf. Sci. 166,87(1986)]. For Si, the atomic potentials used were the empirical potential due to Tersoff[Phys. Rev. B 37,6991(1988)] and an environment dependent potential developed by Bolding and Andersen[Phys. Rev. B 41,10568(1990)]. In the FIM configuration, for both materials, the singly charged positive ion is predicted as the observed species; in the STM configuration, the doubly charged negative ion is the favored ion species since it requires the lowest evaporation field.
Research supported by the NSC of ROC.
On leave from the same department.
On leave from the same department.
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The result was derived by the authors.
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© 1993 Springer Science+Business Media Dordrecht
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Miskovsky, N.M., Tsong, T.T., Wei, C.M. (1993). Atomic Manipulation Using Field Evaporation. In: Binh, V.T., Garcia, N., Dransfeld, K. (eds) Nanosources and Manipulation of Atoms Under High Fields and Temperatures: Applications. NATO ASI Series, vol 235. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-1729-6_17
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DOI: https://doi.org/10.1007/978-94-011-1729-6_17
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