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Ferreira, L. G., Marques, M. & Teles, L. K. Approximation to density functional theory for the calculation of band gaps of semiconductors.
From calculation of band structure, the band gap which occurs oscillations and gradually decreases with increase of the diameter, length, and the number of walls.
In this article, we report the first step of this task: the calculation of band structures for 7439 compounds intended for the research of scintillator materials for γ-ray radiation detection.
As shown in Figure 2, the further calculation of band structure for bulk wurtzite ZnO shows a direct bandgap of 0.81 eV, which is in good agreement with the previous calculation [18], but is smaller than the experimental value.
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This method gave a reasonably accurate calculation of band-gap energy.
Calculations of band structures for the triangular lattices of dielectric cylinders in air for quasi-3D PC structures have been performed.
Calculations of band structure and propagation of electromagnetic field through devices are done by plane wave expansion (PWE) and finite difference time domain (FDTD) methods, respectively.
In the calculations of band structure and optical properties, k-point meshes were replaced by high symmetry point which was set manually according to the Brillouin zone path.
Our recent ab initio calculations of band deformation potentials [27] suggest gap reduction for [111]-grown quantum dots compared with [001] case, yet the effect should be more pronounced for highly strained InAs/GaAs quantum dot.
The image analysis was performed by measuring the average optical intensity and area of each PCR product band followed by calculation of the band volume by multiplying the average optical intensity with the correspondent area.
The theoretical calculation of electronic band structure revealed that the contribution of these dopants on the overall band structure of La2Ti2O7 was negligible, but that they formed a partially filled 3d band in the band gap of La2Ti2O7, from which photoelectrons are excited to the conduction band upon visible light absorption.
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