AUTHOR KEYWORDS: DFT; Diluted magnetic semiconductor; Spin polarization; Transition elements INDEX KEYWORDS: Atoms; Density functional theory; Diluted magnetic semiconductors; Electronic properties; Gallium phosphide; III-V semiconductors; Indium compounds; Lattice constants; Magnetic moments; Magnetic properties; Magnetic semiconductors; Spin polarization; Transition metals; Vanadium compounds, Diluted magnetic semiconductors (DMSs); First-principle density-functional theories; Full potential linearized augmented plane wave method; Generalized gradient approximations; Structural and magnetic properties; Structural parameter; Total density of state; Transition element, Structural properties PUBLISHER: Springer New York LLC
AUTHOR KEYWORDS: Green’s function method; Polyacetylene; Soliton; Spin filtering INDEX KEYWORDS: Energy gap; Molecules; Polyacetylenes; Spin polarization, Band gap width; Electron interaction; Extended Hubbard model; Neutral solitons; S function; Spin density distributions; Spin filtering; Spin polarized transport, Solitons PUBLISHER: Springer New York LLC
AUTHOR KEYWORDS: Asymmetry parameter; Chemical pressure; Electrical field gradient; Nanocluster INDEX KEYWORDS: Gadolinium; Intermetallics; Nanoclusters; Nanomagnetics, Antiferromagnetics; Asymmetry parameter; Chemical pressures; Conduction electrons; Correlation lengths; Electrical field gradients; Nano-crystalline structures; Short-range exchange, Chemical compounds PUBLISHER: Springer New York LLC
Germanium nanostructures were generated in the post annealed germanium oxide thin films. Visible and near infrared photoluminescence bands were observed in the samples annealed at 350°C and 400°C, respectively. These different luminescence ranges are attributed to the presence of the defects in oxide matrix and quantum confinement effect in the germanium nanostructures, respectively. Decay time and temperature dependence of the luminescence for different bands were investigated, which confirmed our idea about the origin of the luminescence.
AUTHOR KEYWORDS: Germanium; Nanostructures; Photoluminescence; Temperature dependence
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