Results 31 to 40 of about 1,164,525 (314)

TiO2/Gold nanocomposite as an extremely sensitive molecule sensor for NO2 detection: A DFT study [PDF]

open access: yesJournal of Water and Environmental Nanotechnology, 2016
First-principles calculations within density functional theory (DFT) have been performed to investigate the interactions of NO2 molecules with TiO2/Gold nanocomposites in order to completely exploit the adsorption properties of these nanostructures ...
Amirali Abbasi   +2 more
doaj   +1 more source

Visualizing and Characterizing Excited States from Time-Dependent Density Functional Theory

open access: yes, 2023
Time-dependent density functional theory (TD-DFT) is the most widely-used electronic structure method for excited states, due to a favorable combination of low cost and (in many contexts) semi-quantitative accuracy.
John, Herbert
core   +1 more source

Light absorption coefficient of an ordered array of spherical quantum dot chains

open access: yesCondensed Matter Physics, 2017
We considered intersubband electron transitions in an array of one-dimensional chains of spherical quantum dots in the GaAs/Al_xGa_{1-x}As semiconductor system.
V.I. Boichuk   +2 more
doaj   +1 more source

Calculation of the Band Structure for GaAs and ZnTe Nanoparticles from the Density Functional Theory Based on LDA, GGA and HSE06 [PDF]

open access: yesEurasian Journal of Science and Engineering, 2019
The energy band structure and density of state (DOS) are calculated using density functional theory (DFT) for GaAs and ZnTe semiconductors for both the bulk and nanoparticles (NPs) and implemented in the CASTEP code.
Botan Jawdat Abdullah   +1 more
doaj   +1 more source

Confirming X-ray parametric down conversion by time–energy correlation

open access: yesResults in Physics
We present measurements of X-ray Parametric Down Conversion at the Advanced Photon Source synchrotron facility. Using an incoming pump beam at 22 keV, we observe the simultaneous, elastic emission of down-converted photon pairs generated in a diamond ...
N.J. Hartley   +18 more
doaj   +1 more source

DFT studies of BaTiO3

open access: yesҚарағанды университетінің хабаршысы. Физика сериясы, 2023
The structure of stable phases is investigated using first-principle calculations based on the functionals: LDA, GGA and newly developed general-purpose heavily constrained and appropriately normalized meta GGAfunctional (SCAN).
Т.М. Инербаев   +5 more
doaj   +1 more source

Density of States in Gauge Theories [PDF]

open access: yesPhysical Review Letters, 2012
The density of states is calculated for the SU(2), SU(3), and a compact U(1) lattice gauge theories using a modified version of the Wang-Landau algorithm. We find that the density of states of the SU(2) gauge theory can be reliably calculated over a range of 120,000 orders of magnitude for lattice sizes as big as 20(4).
Langfeld, Kurt   +2 more
openaire   +5 more sources

Density of trap states in a polymer field-effect transistor

open access: yes, 2014
We report a more accurate method to determine the density of trap states in a polymer field-effect transistor. In the approach, we describe in this letter, we take into consideration the sub-threshold behavior in the calculation of the density of trap ...
Ha, Tae-Jun   +7 more
core   +1 more source

Density of States Graph Kernels [PDF]

open access: yes, 2021
A fundamental problem on graph-structured data is that of quantifying similarity between graphs. Graph kernels are an established technique for such tasks; in particular, those based on random walks and return probabilities have proven to be effective in wide-ranging applications, from bioinformatics to social networks to computer vision.
Leo Huang, Andrew Graven, David Bindel
openaire   +2 more sources

On the density of states of graphene in the nearest-neighbor approximation

open access: yesCondensed Matter Physics, 2017
We propose an alternative analytical expression for the density of states of a clean graphene in the nearest-neighbor approximation. In contrast to the previously known expression, it can be written as a single formula valid for the whole energy range ...
V.O. Ananyev, M.I. Ovchynnikov
doaj   +1 more source

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