Diffusion and Cluster Growth of Binary Alloys on Surfaces
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Mario Einax
Abstract
Metastable nanoclusters grown on surfaces by vapour deposition or molecular beam epitaxy techniques have become an active topic in surface science because of their potential to display new physical properties useful for applications. Atomistic modelling and Kinetic Monte Carlo (KMC) simulations of these processes are reviewed with emphasis on two-component adatom systems. The situation we consider is that two types of atoms are co-deposited to the substrate. In this field of binary growth, systematic theoretical investigation is only at its beginning. Surface diffusion and nucleation leads to the formation of two-dimensional islands, before two-dimensional cluster growth sets in. In distinction to well-known growth scenarios for one species of adatoms, a wealth of new aspects arises in binary systems. Already in the regime of submonolayer growth, differences in adatom diffusion coefficients and binding energies make it necessary to generalise traditional scaling relations for island densities. Surface segregation and compositional fluctuations in growing 3-D clusters are issues requiring renewed examination under the point of view that the atomic short-range order, which is frozen in the bulk, was generated through the surface kinetics during previous stages of growth. We discuss the current theoretical understanding and experimental implications of these problems, including a description of perpendicular magnetic anisotropy (PMA) in metastable CoPt3 nanoalloys, as detected recently.
© by Oldenbourg Wissenschaftsverlag, Osnabrück, Germany
Articles in the same Issue
- Preface
- Bombardment Induced Potassium Ion Transport Through a Sodium Ion Conductor: Conductivities and Diffusion Profiles
- Diffusion and Cluster Growth of Binary Alloys on Surfaces
- Synthesis of Novel Lithium Salts containing Pentafluorophenylamido-based Anions and Investigation of their Thermal and Electrochemical Properties
- Dual-ion Cells Based on Anion Intercalation into Graphite from Ionic Liquid-Based Electrolytes
- Ionic Transport and Structure in Doped Plastically Crystalline Solids
- Transport and Electromechanical Properties of Stoichiometric Lithium Niobate at High Temperatures
- Low-Temperature DC Conductivity of LiNbO3 Single Crystals
- Self-Diffusion of Lithium in Amorphous Lithium Niobate Layers
- Theoretical Investigation of Migration Pathways for Li Diffusion in h-LiTiS2
- Kinetics of Lithium Intercalation in Titanium Disulfide Single Crystals
- Structural control of ionic conductivity in LiAlSi2O6 and LiAlSi4O10 glasses and single crystals
- Studying Li Dynamics in a Gas-Phase Synthesized Amorphous Oxide by NMR and Impedance Spectroscopy
- Li Ion Dynamics in Al-Doped Garnet-Type Li7La3Zr2O12 Crystallizing with Cubic Symmetry
Articles in the same Issue
- Preface
- Bombardment Induced Potassium Ion Transport Through a Sodium Ion Conductor: Conductivities and Diffusion Profiles
- Diffusion and Cluster Growth of Binary Alloys on Surfaces
- Synthesis of Novel Lithium Salts containing Pentafluorophenylamido-based Anions and Investigation of their Thermal and Electrochemical Properties
- Dual-ion Cells Based on Anion Intercalation into Graphite from Ionic Liquid-Based Electrolytes
- Ionic Transport and Structure in Doped Plastically Crystalline Solids
- Transport and Electromechanical Properties of Stoichiometric Lithium Niobate at High Temperatures
- Low-Temperature DC Conductivity of LiNbO3 Single Crystals
- Self-Diffusion of Lithium in Amorphous Lithium Niobate Layers
- Theoretical Investigation of Migration Pathways for Li Diffusion in h-LiTiS2
- Kinetics of Lithium Intercalation in Titanium Disulfide Single Crystals
- Structural control of ionic conductivity in LiAlSi2O6 and LiAlSi4O10 glasses and single crystals
- Studying Li Dynamics in a Gas-Phase Synthesized Amorphous Oxide by NMR and Impedance Spectroscopy
- Li Ion Dynamics in Al-Doped Garnet-Type Li7La3Zr2O12 Crystallizing with Cubic Symmetry
