Dresden 2009 – scientific programme
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O: Fachverband Oberflächenphysik
O 42: Poster Session II (Nanostructures at surfaces: arrays; Nanostructures at surfaces: Dots, particles, clusters; Nanostructures at surfaces: Other; Nanostructures at surfaces: Wires, tubes; Metal substrates: Adsorption of O and/or H; Metal substrates: Clean surfaces; Metal substrates: Adsorption of organic/bio moledules; Metal substrates: Solid-liquid interfaces; Metal substrates: Adsorption of inorganic molecules; Metal substrates: Epitaxy and growth; Heterogeneous catalysis; Surface chemical reactions; Ab-initio approaches to excitations in condensed matter; Organic, polymeric, biomolecular films– also with adsorbates; Particles and clusters)
O 42.79: Poster
Wednesday, March 25, 2009, 17:45–20:30, P2
Kinetic Monte Carlo study of growth of Co on Cu(110) at room temperature — Oleg V. Stepanyuk1, •Nikolay N. Negulyaev2, Alexander M. Saletsky1, and Wolfram Hergert2 — 1Faculty of Physics, Moscow State University, 119899 Moscow, Russia — 2Fachbereich Physik, Martin-Luther-Universität, D06099 Halle, Germany
During the last decade many experimental and theoretical studies have been performed on Co/Cu heterostructures which are of great interest for spintronic applications. While the formation of thin Co films during thermal deposition on Cu(100) and Cu(111) has been investigated and understood at the atomic scale [1,2], our knowledge about growth process of Co on Cu(110) is still missing.
Here, performing atomic-scale simulations we study the growth of Co on Cu(110) in the early stages of heteroepitaxy. The energetics of various diffusion processes relevant for this system is investigated by means of molecular dynamics simulations and density functional theory. We show that the interface intermixing occurs at room temperature [3]. Our results reveal that embedded Co atoms serve as nucleation centers for substituted Cu atoms. Surface diffusion of expelled Cu adatoms rules an elongated along the [1-10] direction shape of nanoislands consisting mainly of Cu atoms [3].
[1] F. Nouvertne et al., Phys. Rev. B 60, 14382 (1999).
[2] N.N. Negulyaev et al., Phys. Rev. B 77, 125437 (2008).
[3] O.V. Stepanyuk et al., Phys. Rev. B 78, 113406 (2008).