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Ab initio study of hydrogen chemisorption in nitrogen-doped carbon nanotubes
The electronic structure of single walled nitrogen-doped carbon nanotubes is calculated by first principles using density functional theory within the supercell approach with periodic boundary conditions. The effect of the ...
Laterally coupled circular quantum dots under applied electric field
The optical response of a system of two laterally coupled quantum dots with circular cross-sectional shape is investigated within the effective mass approximation, taking into account the effects of the change in the ...
Donor impurity states in semiconductor zincblende nitride quantum systems as a source of nonlinear optical response
The optical absorption and the optical rectification coefficients associated to hydrogenic impurity interstate transitions in zincblende GaN-based nanostructures of the quantum wire type are investigated. The system is ...
Nonlinear optical response in a zincblende GaN cylindrical quantum dot with donor impurity center
We calculate the nonlinear optical absorption coefficient of a cylindrical zincblende GaN-based quantum dot. For this purpose, we consider Coulomb interactions between electrons and an impurity ionized donor atom. The ...
Effects of external electric field on the optical and electronic properties of blue phosphorene nanoribbons: A DFT study
Using first principles calculations we investigate the effect of external electric fields in the optical and electronic properties of blue-phosphorene nanoribbons. It is shown that the application of a static external ...