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Article Dans Une Revue Surface Science : A Journal Devoted to the Physics and Chemistry of Interfaces Année : 2008

Growth of iron on gold (788) vicinal surface: From nanodots to step flow

Résumé

The growth morphology of iron on Au(7 8 8) has been investigated from 45 K to 430 K by use of variable temperature scanning tunneling microscopy. This system displays an ordered growth regime of a nanodots array from 70 K to 300 K (room temperature, RT). According to the temperature, the dots are found to grow on two different sites: below 250 K, they form rounded isolated islands above the steps where local traps act as nucleation centers; from 250 K to 300 K, they have the shape of platelets regularly disposed along the bottom of the step edges and located on face centered cubic area of the Au(7 8 8) surface reconstruction. Above RT, as a function of temperature, we find a progressive transition of the growth morphology, from ordered platelets to a step flow growth. A surface alloy formation induced by the high step density is the driving force of this growth mode transition. (C) 2007 Elsevier B.V. All rights reserved.

Dates et versions

hal-01987582 , version 1 (21-01-2019)

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Citer

S. Rohart, Y. Girard, Y. Nahas, V. Repain, G. Rodary, et al.. Growth of iron on gold (788) vicinal surface: From nanodots to step flow. Surface Science : A Journal Devoted to the Physics and Chemistry of Interfaces, 2008, 602 (1), pp.28-36. ⟨10.1016/j.susc.2007.09.036⟩. ⟨hal-01987582⟩
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