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We perform first-principles calculations of the structural, electronic, mechanical, and thermodynamic properties of thorium hydrides (ThH$_{2}$ and Th$_{4}$H$_{15}$) based on the density functional theory with generalized gradient…

Materials Science · Physics 2015-05-14 Bao-Tian Wang , Ping Zhang , Hongzhou Song , Hongliang Shi , Dafang Li , Wei-Dong Li

Using gradient-corrected, all-electron, full-potential, density-functional calculations, including structural relaxations, it is found that the metal hydrides $RT$InH$_{1.333}$ (R = La, Ce, Pr, or Nd; T = Ni, Pd, or Pt) possess unusually…

Materials Science · Physics 2009-11-07 P. Ravindran , P. Vajeeston , R. Vidya , A. Kjekshus , H. Fjellvaag

The electronic structure of the nanolaminated transition metal carbide Ti2AlC has been investigated by bulk-sensitive soft x-ray emission spectroscopy. The measured Ti L, C K and Al L emission spectra are compared with calculated spectra…

Materials Science · Physics 2011-12-30 M. Magnuson , O. Wilhelmsson , J. -P. Palmquist , U. Jansson , M. Mattesini , S. Li , R. Ahuja , O. Eriksson

The electronic structure and the anisotropy of the Al - N {\pi} and {\sigma} chemical bonding of wurtzite AlN has been investigated by bulk-sensitive total fluorescence yield absorption and soft x-ray emission spectroscopies. The measured N…

Materials Science · Physics 2011-12-30 M. Magnuson , M. Mattesini , C. Höglund , J. Birch , L. Hultman

Aluminum hydride (alane) AlH_3 is an important material in hydrogen storage applications. It is known that AlH_3 exists in multiply forms of polymorphs, where $\alpha$-AlH_3 is found to be the most stable with a hexagonal structure. Recent…

Materials Science · Physics 2009-11-13 Yan Wang , Jia-An Yan , M. Y. Chou

X-ray diffraction multipole refinements of single-crystalline Mg$_x$Al$_{1-x}$B$_2$ and polarization-dependent near-edge x-ray absorption fine structure at the B 1$s$ edge reveal a strongly anisotropic electronic structure. Comparing the…

Superconductivity · Physics 2016-04-01 M. Merz , P. Schweiss , Th. Wolf , H. v. Löhneysen , S. Schuppler

The crystal structure, mechanical properties and electronic structure of ground state BeH$_{2}$ are calculated employing the first-principles methods based on the density functional theory. Our calculated structural parameters at…

Materials Science · Physics 2015-05-13 Bao-Tian Wang , Ping Zhang , Hongliang Shi , Bo Sun , Weidong Li

The electronic structures of epitaxially grown films of Ti3AlC2, Ti3SiC2 and Ti3GeC2 have been investigated by bulk-sensitive soft X-ray emission spectroscopy. The measured high-resolution Ti L, C K, Al L, Si L and Ge M emission spectra are…

The mechanical properties, electronic structure and phonon dispersion of ground state ThO$_{2}$ as well as the structure behavior up to 240 GPa are studied by using first-principles density-functional theory. Our calculated elastic…

Materials Science · Physics 2015-05-14 Baotian Wang , Hongliang Shi , Weidong Li , Ping Zhang

Atomically-thin magnetic crystals have been recently isolated experimentally, greatly expanding the family of two-dimensional materials. In this Article we present an extensive comparative analysis of the electronic and magnetic properties…

Strongly Correlated Electrons · Physics 2019-09-06 Guido Menichetti , Matteo Calandra , Marco Polini

The nature of the bonding in Li$_3$AlH$_6$ has been re-examined with additional analyses using density-functional calculations. From partial density of states, charge density distribution, charge transfer, electron localization function,…

Materials Science · Physics 2007-05-23 P. Vajeeston , P. Ravindran , A. Kjekshus , H. Fjellvåg

The electronic structure and intrinsic magnetic properties of $\text{Fe}_2\text{AlB}_2$-related compounds and their alloys have been investigated using density functional theory. For $\text{Fe}_2\text{AlB}_2$, the crystallographic $a$ axis…

Materials Science · Physics 2017-03-22 Liqin Ke , Bruce N. Harmon , Matthew J. Kramer

We study the electronic structures and dielectric functions of the simple hydrides LiH, NaH, MgH2 and AlH3, and the complex hydrides Li3AlH6, Na3AlH6, LiAlH4, NaAlH4 and Mg(AlH4)2, using first principles density functional theory and GW…

Materials Science · Physics 2007-05-23 M. J. van Setten , V. A. Popa , G. A. de Wijs , G. Brocks

By means of density functional theory the electronic structure of the MgB2 superconductor was characterised and compared with that of the related iso-structural systems: AlB2, ZrB2, NbB2, and TaB2. Using the full-potential linearized…

Superconductivity · Physics 2009-11-07 Pablo de la Mora , Miguel Castro , Gustavo Tavizon

The stability and bonding of the ternary complex K$_2$PtCl$_6$ structure hydrides is discussed using first principles density functional calculations. The cohesion is dominated by ionic contributions, but ligand field effects are important,…

Materials Science · Physics 2009-11-10 S. V. Halilov , D. J. Singh , M. Gupta , R. Gupta

We study the structural and electronic properties of phase III of solid hydrogen using accurate many-electron theories and compare to state-of-the-art experimental findings. The atomic structures of phase III modelled by C2/c-24 crystals…

Materials Science · Physics 2021-02-24 Ke Liao , Tong Shen , Xin-Zheng Li , Ali Alavi , Andreas Grüneis

Density functional calculations of the electronic structure of the complex hydride NaAlH4 and the reference systems NaH and AlH3 are reported. We find a substantially ionic electronic structure for NaAlH4, which emphasizes the importance of…

Materials Science · Physics 2009-11-10 A Aguayo , D. J. Singh

A combination of the extended Ice Rule of Pauling, Raman spectroscopy, and molecular dynamics calculations has enabled us to clarify the bonding origin of the anomalous volume expansion, Raman phonon relaxation, and the stiffness and…

Other Condensed Matter · Physics 2011-10-04 Xi Zhang , Xiaojian Fu , Yu Wen , Jer-lai Kuo , Zexiang Shen , Ji Zhou , Chang Q. Sun

Td-WTe2 is a topological Weyl semimetal. WTe2 in the orthorhombic structure is stable at room temperature. Elastic, electronic, bonding, and optoelectronic properties of WTe2 have been investigated in detail in this work using the density…

Materials Science · Physics 2020-12-01 B. Rahman Rano , Ishtiaque M. Syed , S. H. Naqib

We have studied the structural and electronic properties of defect chalcopyrite semiconductors AAl2Se4 (A = Ag, Cu, Cd, Zn) using Density Functional Theory (DFT) based first principle technique within Tight binding Linear Muffin Tin orbital…

Materials Science · Physics 2015-05-20 S. Mishra , B. Ganguli
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