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We perform a systematic \textit{ab initio} density functional study of the superconductivity, electronic and phononic band structures, electron-phonon coupling and elastic constants of all four possible structures of niobium nitride…

超导电性 · 物理学 2023-08-15 K. Ramesh Babu , Guang-Yu Guo

Adiabatic mixed quantum/classical molecular dynamics simulations were used to generate snapshots of the hydrated electron (e-) in liquid water at 300 K. Water cluster anions that include two complete solvation shells centered on the e- were…

数据分析、统计与概率 · 物理学 2016-09-28 Ilya A. Shkrob , William J. Glover , Ross E. Larsen , Benjamin J. Schwartz

We present an angle-resolved photoemission spectroscopy study of the electronic structure of SnTe, and compare the experimental results to ab initio band structure calculations as well as a simplified tight-binding model of the p-bands. Our…

The elastic properties of the $B_1$-structured transition-metal nitrides and their carbide counterparts are studied using the {\it ab initio\} density functional perturbation theory. The linear response results of elastic constants are in…

材料科学 · 物理学 2009-11-10 Zhigang Wu , Xiao-Jia Chen , Viktor V. Struzhkin , Ronald E. Cohen

The structural and electronic properties of zinc-blende (ZB) GaAs were calculated within the framework of plane wave density-functional theory (DFT) code JDFTx by using Becke 86 in 2D and PBE exchange correlation functionals from libXC. The…

计算物理 · 物理学 2019-11-26 Waqas Mahmood , Bing Dong

Traditional band theory of perfect crystalline solids often uses as input the structure deduced from diffraction experiments; when modeled by the minimal unit cell this often produces a spatially averaged model. The present study…

材料科学 · 物理学 2021-01-04 Zhi Wang , Xingang Zhao , Robert Koch , Simon J. L. Billinge , Alex Zunger

We present a finite-temperature density functional theory investigation of the nonequilibrium transient electronic structure of warm dense Li, Al, Cu, and Au created by laser excitation. Photons excite electrons either from the inner shell…

原子物理 · 物理学 2021-02-26 Hengyu Zhang , Shen Zhang , Dongdong Kang , Jiayu Dai , M. Bonitz

We have carried out a first principles study of the elastic properties and electronic structure for two room-temperature stable Pt silicide phases, tetragonal alpha-Pt_2Si and orthorhombic PtSi. We have calculated all of the equilibrium…

材料科学 · 物理学 2009-10-31 O. Beckstein , J. E. Klepeis , G. L. W. Hart , O. Pankratov

In aluminium electrolysis cells, a ledge of frozen electrolyte is formed, attached to the sides of the cell. The control of the side ledge thickness is essential in ensuring a reasonable lifetime for the cells. Numerical modelling of the…

材料科学 · 物理学 2016-09-30 Aimen E. Gheribi , Patrice Chartrand

Structural, elastic and thermal properties of cementite (Fe$_3$C) were studied using a Modified Embedded Atom Method (MEAM) potential for iron-carbon (Fe-C) alloys. Previously developed Fe and C single element potentials were used to…

We have performed systematic first principles study of the electronic structure and band topology properties of $LnPn$ compounds ($Ln$=Ce, Pr, Gd, Sm, Yb; $Pn$=Sb, Bi). Assuming the $f$-electrons are well localized in these materials, both…

强关联电子 · 物理学 2018-11-09 Xu Duan , Fan Wu , Jia Chen , Peiran Zhang , Yang Liu , Huiqiu Yuan , Chao Cao

The soft wall AdS/QCD holographic model provides simple estimates for the spectra of light mesons and glueballs satisfying linear Regge trajectories. It is also an interesting tool to represent the confinement/deconfinement transition of a…

高能物理 - 理论 · 物理学 2021-07-07 Nelson R. F. Braga , Octavio C. Junqueira

We present an approach to solid-state electronic-structure calculations based on the finite-element method. In this method, the basis functions are strictly local, piecewise polynomials. Because the basis is composed of polynomials, the…

凝聚态物理 · 物理学 2009-10-31 J. E. Pask , B. M. Klein , C. Y. Fong , P. A. Sterne

Through first-principles calculation based on the density functional theory (DFT) within the pseudo potential-plane wave (PP-PW) approach, we studied the structural, mechanical and thermal properties of Cu$_2$CdSnSe$_4$ and Cu$_2$HgSnSe$_4$…

材料科学 · 物理学 2017-02-13 S. Bensalem , M. Chegaar , A. Bouhemadou

The electronic energy structures and magnetic properties of iron-based compounds with group VI elements (FeTe, BiFeO$_3$, SrFe$_{12}$O$_{19}$ and SrCoTiFe$_{10}$O$_{19}$) are studied using the density functional theory (DFT) methods.…

材料科学 · 物理学 2015-10-05 G. E. Grechnev , A. A. Lyogenkaya , O. V. Kotlyar , A. S. Panfilov , V. P. Gnezdilov

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 electronic band structure of a liquid metal was investigated by measuring precisely the evolution of angle-resolved photoelectron spectra during the melting of a Pb monolayer on a Si(111) surface. We found that the liquid monolayer…

材料科学 · 物理学 2011-09-23 Keun Su Kim , Han Woong Yeom

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…

超导电性 · 物理学 2009-11-07 Pablo de la Mora , Miguel Castro , Gustavo Tavizon

The electronic band structure of CaSnN$_2$ in the wurtzite-based $Pna2_1$ structure is calculated using the Quasiparticle Self-consistent (QS)GW$^{BSE}$ method, including ladder diagrams in the screened Coulomb interaction W$^{BSE}$ and is…

材料科学 · 物理学 2026-04-20 Ilteris K. Turan , Sarker Md. Sadman , Walter R. L. Lambrecht

The first principles calculations of band gaps and bulk moduli of cesium lead halide perovskite solid solutions, $CsPb(I_{1-x}Cl_x)_3$ and $CsPb(I_{1-x}Br_x)_3$, are performed at the level of general gradient approximation of the density…

无序系统与神经网络 · 物理学 2020-01-08 Vladimir Saleev , Alexandra Shipilova
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