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First Principles Simulations on Migration Paths of Oxygen Interstitials in MgAl2O4
(Wiley-VCH Verlag, 2018)
Thermal stability of the primary electronic defects – F‐type centers – in oxide materials is controlled by their recombination with much more mobile complementary defects – interstitial oxygen ions Oi. Thus, the study of ...
First-principles calculations of oxygen interstitials in corundum: A site symmetry approach
(Royal Society of Chemistry, 2017)
Using site symmetry analysis, four possible positions of interstitial oxygen atoms in the α-Al2O3 hexagonal structure have been identified and studied. First principles hybrid functional calculations of the relevant atomic ...
Ab initio simulations on charged interstitial oxygen migration in corundum
(Elsevier B.V., 2018)
We have calculated possible migration trajectories for single-charged interstitial Oi− anion using large-scale hybrid density functional theory within linear combination of atomic orbitals approach to defective α-Al2O3 ...
Nitrogen interstitial defects in silicon. A quantum mechanical investigation of the structural, electronic and vibrational properties
(Elsevier B.V., 2019)
The vibrational features of eight interstitial nitrogen related defects in silicon have been investigated at the first principles quantum mechanical level by using a periodic supercell approach, a hybrid functionals, an ...
Hybrid density functional calculations of hyperfine coupling tensor for hole-type defects in MgAl2O4
(Elsevier B.V., 2020)
We have performed the density functional calculations (DFT) on the hole-type defects (V-centres) in magnesium aluminate spinel (MgAl2O4) following the results of recent paramagnetic resonance measurements (EPR) in Nucl. ...
Atomic, electronic and magnetic structure of an oxygen interstitial in neutron-irradiated Al2O3 single crystals
(Nature Research, 2020)
A single radiation-induced superoxide ion O2- has been observed for the first time in metal oxides. This structural defect has been revealed in fast-neutron-irradiated (6.9×1018n/cm2) corundum (α-Al2O3) single crystals ...
Modeling of the Lattice Dynamics in Strontium Titanate Films of Various Thicknesses: Raman Scattering Studies
(MDPI, 2023)
While the bulk strontium titanate (STO) crystal characteristics are relatively well known, ultrathin perovskites’ nanostructure, chemical composition, and crystallinity are quite complex and challenging to understand in ...
Ab Initio Study on the Vibrational and Electronic Properties of Radiation-Induced Defects in Potassium Bromide
(MDPI, 2024)
The vibrational and electronic properties of several basic radiation defects in potassium bromide are computed at the quantum mechanical level using a periodic supercell approach based on hybrid functionals, an all-electron ...