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- W2004150218 abstract "Computations of the periodic double-interface MO2/Si (M = Zr and Hf) systems using density functional theory (DFT) demonstrate that very thin epitaxial MO2 layers at silicon (1 0 0) surface adopt anatase-like structure with six-coordinate M atoms, while tetragonallike MO2 structure with seven-coordinated M atoms has a lower stability (metastable). This results from a closer match between Si(1 0 0) surface unit cell and anatase-like ZrO2 and HfO2 leading to the overall stress reduction if MO2 adopts the anatase-like structure on silicon. In agreement with the previous study of Gavartin et al. [Gavartin, Fonseca, Bersuker, Shluger, Microelectron. Eng. 80 (2005) 412– 415] formation of oxygen vacancy at the interface is demonstrated to be lower than in bulk film. This result appears to be independent from the film or interface structure but originates from the energy balance between M–O, M–M, Si–O and M–Si bonds, as revealed by a simple molecular model. 2008 Elsevier B.V. All rights reserved." @default.
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- W2004150218 date "2008-10-01" @default.
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- W2004150218 title "Zirconium and hafnium oxide interface with silicon: Computational study of stress and strain effects" @default.
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- W2004150218 doi "https://doi.org/10.1016/j.commatsci.2008.02.007" @default.
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