Manifestation of the heterogeneous mechanism upon melting of low-dimensional systems |
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Authors: | D G Gromov and S A Gavrilov |
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Institution: | 1.Moscow Institute of Electronic Technology (Technical University), Zelenograd, Moscow oblast, 124498, Russia ; |
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Abstract: | A melting process that is always heterogeneous in semi-infinite systems having a surface has been analyzed. It has been shown
in terms of the classical thermodynamics that, in real one-component systems, a liquid layer on the solid-phase surface is
formed at temperatures lower than the reference melting temperature of the bulk material at which the system is completely
melted. Depending on the temperature, a liquid layer of particular thickness on the surface is in equilibrium with the other
crystalline phase. The heterogeneous melting is shown to influence a number of processes and mechanisms, such as the dispersion
of a thin film into droplets, the mechanism of vapor-liquid-solid epitaxy, the mechanism of layer-by-layer crystal growth,
and the mechanism of growth of carbon nanotubes. |
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