Demixing processes in AgPd superlattices
(2009) Journal of Physics: Condensed Matter — Vol. 21, n° 31, p. 315002 : 1-11 (2009)
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- Abstract
- The present scanning tunneling microscopy (STM) study describes the growth of silver-palladium heterostructures at room temperature, with ab initio simulations of ordered AgPd phases supporting the interpretation of STM images. First, the growth of Pd on an Ag(111) surface proceeds in a multilayer mode, leading to the formation of a columnar structure. Then, upon Ag deposition on this structure, Ag and Pd partially mix and form a two-dimensional AgPd alloy on top of the columns. Finally, an atomically flat Ag(111) surface is restored, and two-dimensional growth continues. An interpretation of this peculiar growth mode including interfacial alloying is proposed based on thermodynamic and kinetic arguments.
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Dumont, J., Sporken, R., Verstraete, M. J., Ghijsen, J., & Gonze, X. (2009). Demixing processes in AgPd superlattices. Journal of Physics: Condensed Matter, 21(31), 315002 : 1-11. https://doi.org/10.1088/0953-8984/21/31/315002 (Original work published 2009)