BAND GAP WIDTH OF HIDDEN NiSi2 NANOCRYSTALS CREATED IN THE NEAR-SURFACE REGION OF Si

NiSi2 nanofilms, surface structure, Auger electron spectroscopy, solid-phase deposition, morphology, ultrahigh vacuum, heterostructure, band gap, scanning electron, atomic force microscopy.

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In this work, nanocrystalline phases and layers of NiSi2 were obtained by implantation of Ni + ions in Si in combination with annealing in the near-surface Si layer at a depth of 15-25 nm. At D = 8 ∙ 1016 cm-3, a nanofilm heterostructure of the Si/NiSi2/Si type was formed. For the first time, the band gap widths of nanocrystalline phases and NiSi2 layers formed in the near-surface region of Si have been estimated. It is shown that island films of NiSi2 are formed at thicknesses h <150 Å. The band gap of the islands and NiSi2 films practically do not differ from each other and amounted to ~ 0.6 eV, and the values of differ by several orders of magnitude

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