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In the present work, the atomic and the electronic structures of Au3N, AuN and AuN2 are investigated using first-principles density-functional theory (DFT). We studied cohesive energy vs. volume data for a wide range of possible structures…

材料科学 · 物理学 2015-11-24 Mohammed S. H. Suleiman , Daniel P. Joubert

We present a detailed first-principles DFT study of the equation of state (EOS), energy-optimized geometries, phase stabilities and electronic properties of bulk crystalline Cu3N, CuN and CuN2 in a set of twenty different structural phases.…

材料科学 · 物理学 2018-05-18 Mohammed S. H. Suleiman , Mahlaga P. Molepo , Daniel P. Joubert

The atomic and electronic structures of Pd3N, PdN and PdN2 were investigated using ab initio density-functional theory (DFT). We studied cohesive energy vs. volume equation of states (EOS) for a set of reported and hypothetical structures.…

材料科学 · 物理学 2013-10-11 Mohammed S. H. Suleiman , Daniel P. Joubert

We present a detailed quantum mechanical non empirical DFT investigation of the energy-optimized geometries, phase stabilities and electronic properties of bulk Pt3N, PtN and PtN2 in a set of twenty different crystal structures. Structural…

材料科学 · 物理学 2013-01-24 Mohammed S. H. Suleiman , Daniel P. Joubert

We report using density functional theory (DFT), the ground-state properties of the recently synthesized and characterized Sr$_3$[C$_2$N]$_2$ crystal. The nearly colorless, centrosymmetric Sr$_3$[C$_2$N]$_2$ crystallizes in a monoclinic…

A number of diverse bulk properties of the zincblende and wurtzite III-V nitrides AlN, GaN, and InN, are predicted from first principles within density functional theory using the plane-wave ultrasoft pseudopotential method, within both the…

材料科学 · 物理学 2009-10-31 A. Zoroddu , F. Bernardini , P. Ruggerone , V. Fiorentini

The correlated electronic structure of iron, cobalt and nickel is investigated within the dynamical mean-field theory formalism, using the newly developed full-potential LMTO-based LDA+DMFT code. Detailed analysis of the calculated electron…

强关联电子 · 物理学 2009-03-16 Alexei Grechnev , Igor Di Marco , M. I. Katsnelson , A. I. Lichtenstein , John Wills , Olle Eriksson

New theoretical and experimental investigation of the occupied and unoccupied local electronic density of states (DOS) are reported for alpha-Li3N. Band structure and density functional theory calculations confirm the absence of covalent…

The elastic, electronic and optical properties of MNNi3 (M= Zn, Sn and Cu) have been calculated using the plane-wave ultrasoft pseudopotential technique which is based on the first-principles density functional theory (DFT) with generalized…

材料科学 · 物理学 2015-05-30 M. A. Helal , A. K. M. A. Islam

The full potential all electron linearized augmented plane wave plus local orbitals (FP-LAPW + lo) method, as implemented in the suite of software WIEN2K, has been used to systematically investigate the structural, electronic, and magnetic…

强关联电子 · 物理学 2015-05-14 Raymond Atta-Fynn , Asok K. Ray

The geometric and electronic structures of NaN, CuN, and AgN metal clusters are systematically studied based on the density functional theory over a wide range of cluster sizes 2=<N=<75. A remarkable similarity is observed between the…

材料科学 · 物理学 2015-05-13 Masahiro Itoh , Vijay Kumar , Tadafumi Adschiri , Yoshiyuki Kawazoe

The results of first-principles electronic structure calculations for the nitrogen-rich nickel nitrides $ {\rm NiN} $ and $ {\rm Ni_2N} $ are presented. The calculations are based on density functional theory and used the generalized…

强关联电子 · 物理学 2018-11-27 Abdesalem Houari , Samir F. Matar , Volker Eyert

First-principles calculations were performed, and the results from the study of structural, electronic and elastic properties of zincblende III-arsenide binary compounds (BAs, AlAs, GaAs and InAs) are presented. These properties have been…

材料科学 · 物理学 2019-11-28 Umang Agarwal , Satish Chandra , Virendra Kumar

In this systematic density functional theory study, we compare a standard gradient corrected functional (PBE) with a long-range hybrid functional (HSE06), with and without correction for the dispersion forces, relatively to their ability to…

The density of electronic states for bulk metals Au and Pd, their surfaces in the form of polycrystalline surface layers of nanometer thickness is investigated. The calculations were performed using density functional theory with…

材料科学 · 物理学 2018-02-14 U. N. Kurelchuk , P. V. Borisyuk , O. S. Vasilyev , Yu. Yu. Lebedinsky

The work presents the electronic structure, spin state and optical properties of TM-dinuclear molecules (TM = Cr, Mn, Fe, Co, and Ni) which was modelled according to the recently reported Pt$^{II}$-dinuclear complex…

材料科学 · 物理学 2019-12-19 Indukuru Ramesh Reddy , Kartick Tarafder

An extensive theoretical study is performed for wide bandgap crystalline oxides and nitrides, namely, SiO_{2}, GeO_{2}, Al_{2}O_{3}, Si_{3}N_{4}, and Ge_{3}N_{4}. Their important polymorphs are considered which are for SiO_{2}:…

材料科学 · 物理学 2009-11-11 C. Sevik , C. Bulutay

Silver fulminate (AgCNO) is a primary explosive, which exists in two polymorphic phases namely orthorhombic (\emph{Cmcm}) and trigonal (\emph{R$\bar{3}$}) forms at ambient conditions. In the present study, we have investigated the effect of…

材料科学 · 物理学 2015-06-22 N. Yedukondalu , G. Vaitheeswaran

The electronic structure of AlN in wurtzite and zinc-blende phases is studied experimentally and theoretically. By using x-ray emission spectroscopy, the Al 3p, Al 3s and N 2p spectral densities are obtained. The corresponding local and…

材料科学 · 物理学 2007-05-23 P. Jonnard , N. Capron , F. Semond , J. Massies , E. Martinez-Guerrero , H. Mariette

Although electron energy loss near edge structure analysis provides a tool for experimentally probing unoccupied density of states, a detailed comparison with simulations is necessary in order to understand the origin of individual peaks.…

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