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All-electron pseudopotentials
J Vackář, M Hyt'ha, A Šimůnek - Physical Review B, 1998 - APS
We present an ab initio procedure for the construction of pseudopotentials accommodated to
a crystal environment under study, which takes into account the response of the core charge …
a crystal environment under study, which takes into account the response of the core charge …
Analysis of the electronic and local structure of amorphous :H alloy films in terms of SiK, SiL, and NK x-ray emission bands
G Wiech, A Šimůnek - Physical Review B, 1994 - APS
We have studied silicon-nitrogen bonding states in amorphous SiN x: H alloy films and in
crystalline α-Si 3 N 4 and β-Si 3 N 4 by applying x-ray-emission spectroscopy (XES). We …
crystalline α-Si 3 N 4 and β-Si 3 N 4 by applying x-ray-emission spectroscopy (XES). We …
Local s, p and d charge distributions and x-ray emission bands of SiO2: alpha-quartz and stishovite
A Simunek, J Vackar, G Wiech - Journal of Physics: Condensed …, 1993 - iopscience.iop.org
An experimental and theoretical study of the electronic structure and the X-ray Si K and Si L
emission bands of 4: 2-coordinated alpha-quartz and 6: 3-coordinated stishovite is …
emission bands of 4: 2-coordinated alpha-quartz and 6: 3-coordinated stishovite is …
Adaptability and accuracy of all-electron pseudopotentials
J Vackář, A Šimůnek - Physical Review B, 2003 - APS
We suggest several ways of improving pseudopotential transferability within the approach
based on all-electron self-consistent pseudopotentials. Particularly, we show that the …
based on all-electron self-consistent pseudopotentials. Particularly, we show that the …
Correlation between core-level shift and bulk modulus in transition-metal carbides and nitrides
A Šimůnek, J Vackář - Physical Review B, 2001 - APS
We have developed a computational technique for the calculation of the binding energies of
the core states of atoms in the bond. We applied this technique to all elements in Ti, V, Zr …
the core states of atoms in the bond. We applied this technique to all elements in Ti, V, Zr …
X-ray-absorption near-edge structure of and ZnSe: Experiment and theory
X-ray-absorption near-edge structure (XANES) spectra of a ternary semiconductor CuGaSe
2 at the Cu, Ga, and Se edges were measured and compared with Zn and Se spectra of …
2 at the Cu, Ga, and Se edges were measured and compared with Zn and Se spectra of …
Modelling the valence electronic structure of the core region of an atom in a solid within a local-density approximation pseudopotential framework: reintroduction of the …
J Vackar, A Simunek - Journal of Physics: Condensed Matter, 1994 - iopscience.iop.org
A method for calculating all-electron wavefunctions within the pseudopotential framework is
presented. The phase-shift technique is used to construct valence wavefunctions with the …
presented. The phase-shift technique is used to construct valence wavefunctions with the …
Si K, Si L, and Cr K x-ray valence-band studies of bonding in chromium silicides: Experiment and theory
A Šimůnek, M Polčík, G Wiech - Physical Review B, 1995 - APS
Abstract We present Si K, Si L, and Cr K x-ray emission bands of Cr 3 Si, CrSi, and CrSi 2
together with Si K and Si L emission bands of Cr 5 Si 3. The measured spectra are …
together with Si K and Si L emission bands of Cr 5 Si 3. The measured spectra are …
Ab initio pseudopotentials for interacting atoms
J Vackář, A Šimůnek, R Podloucky - Physical Review B, 1996 - APS
The standard procedures for the construction of pseudopotentials for solid-state calculations
are based on potentials transferred from free atoms. For the atomic calculation one has to …
are based on potentials transferred from free atoms. For the atomic calculation one has to …
Unoccupied electron states of studied by means of polarized x-ray absorption
A Šimůnek, O Šipr, S Bocharov, D Heumann, G Dräger - Physical Review B, 1997 - APS
Using polarized x-ray-absorption spectroscopy along with band-structure and real-space
multiple-scattering calculations, we have studied unoccupied states of TiS 2. With respect to …
multiple-scattering calculations, we have studied unoccupied states of TiS 2. With respect to …