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- W2227659895 abstract "Abstract Germanium is an extremely important material used for numerous functional applications in many fields of nanotechnology. In this paper, we study the crystallization of amorphous Ge using atomistic simulations of critical nano-metric nuclei at high temperatures. We find that crystallization occurs by the recurrent transfer of atoms via a diffusive process from the amorphous phase into suitably-oriented crystalline layers. We accompany our simulations with a comprehensive thermodynamic and kinetic analysis of the growth process, which explains the energy balance and the interfacial growth velocities governing grain growth. For the 〈111〉 crystallographic orientation, we find a degenerate atomic rearrangement process, with two zero-energy modes corresponding to a perfect crystalline structure and the formation of a Σ3 twin boundary. Continued growth in this direction results in the development a twin network, in contrast with all other growth orientations, where the crystal grows defect-free. This particular mechanism of crystallization from amorphous phases is also observed during solid-phase epitaxial growth of 〈111〉 semiconductor crystals, where growth is restrained to one dimension. We calculate the equivalent X-ray diffraction pattern of the obtained nanotwin networks, providing grounds for experimental validation." @default.
- W2227659895 created "2016-06-24" @default.
- W2227659895 creator A5002670293 @default.
- W2227659895 creator A5040116671 @default.
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- W2227659895 date "2015-11-26" @default.
- W2227659895 modified "2023-09-27" @default.
- W2227659895 title "Formation of Nanotwin Networks during High-Temperature Crystallization of Amorphous Germanium" @default.
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- W2227659895 doi "https://doi.org/10.1038/srep17251" @default.
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