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Morphology of two-component surface structures
 Babjak, Viktor ; Kotrla, Miroslav (advisor) ; Předota, Milan (referee)
In the presented thesis we investigate heteroepitaxial growth of one element (one type of adsorbate A with negative or positive misfit relative to substrate S) and static properties of two-component surface alloy, i.e. ternary system (two types of adsorbate A and B with negative and positive misfit relative to different substrat S). We use Monte Carlo simulations for an off-lattice model in (1+1) dimensions with Lennard-Jones interaction. In case of incoherent heteroepitaxial growth we investigate formation of misfit dislocations, their influence on structure of growing film and impurity-induced formation of dislocations. Two different types of formation of dislocations are found, depending on the sign and magnitude of misfit. Simulations of static properties of two-component surface alloys show that morphology is quite different for phase separation (formation of domains consist of one type of particles in direction along and vertically towards to substrate-adsorbate interface) and intermixing regime. The structures, which emerged, depend on relative misfit, interaction and concentration of individual elements.
Detailed record
Morphology of two-component surface structures
 Babjak, Viktor ; Kotrla, Miroslav (advisor) ; Předota, Milan (referee)
In the presented thesis we investigate heteroepitaxial growth of one element (one type of adsorbate A with negative or positive misfit relative to substrate S) and static properties of two-component surface alloy, i.e. ternary system (two types of adsorbate A and B with negative and positive misfit relative to different substrat S). We use Monte Carlo simulations for an off-lattice model in (1+1) dimensions with Lennard-Jones interaction. In case of incoherent heteroepitaxial growth we investigate formation of misfit dislocations, their influence on structure of growing film and impurity-induced formation of dislocations. Two different types of formation of dislocations are found, depending on the sign and magnitude of misfit. Simulations of static properties of two-component surface alloys show that morphology is quite different for phase separation (formation of domains consist of one type of particles in direction along and vertically towards to substrate-adsorbate interface) and intermixing regime. The structures, which emerged, depend on relative misfit, interaction and concentration of individual elements.
Detailed record

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