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The electronic structure of nanolaminate Ti2AlN and TiN thin films has been investigated by bulk-sensitive soft x-ray emission spectroscopy. The measured Ti L, N K, Al L1 and Al L2,3 emission spectra are compared with calculated spectra…

材料科学 · 物理学 2011-12-30 M. Magnuson , M. Mattesini , S. Li , C. Höglund , M. Beckers , L. Hultman , O. Eriksson

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

We have undertaken a study of diluted magnetic semiconductors $Ga_{1-x}Mn_{x}N$ and $Ga_{1-x}Cr_{x}N$ with $x=0.0625, 0.125$, using the all electron linearized augmented plane wave method (LAPW) for different configurations of Mn as well as…

材料科学 · 物理学 2009-11-11 Nandan Tandon , G P Das , Anjali Kshirsagar

Combining single-layer two-dimensional semiconducting transition metal dichalcogenides (TMDs) with graphene layer in van der Waals heterostructures offers an intriguing means of controlling the electronic properties through these…

Crystal phase semiconductor heterostructures allow for electron confinement without uncertainties caused by chemical intermixing found in material heterostructures and are candidates for next generation optoelectronics devices ranging from…

材料科学 · 物理学 2023-08-16 Joseph Sink , Craig Pryor

The electronic properties of the Mn:GaSe interface, produced by evaporating Mn at room temperature on an epsilon-GaSe(0001) single crystal surface, have been studied by soft X-ray spectroscopies. Substitutional effects of Mn replacing Ga…

Quaternary chalcogenide compositions have been broadly explored due to their promising potential for various optoelectronic applications. The band structure, density of states and optical properties of CuZn2InS4 and CuZn2GaS4 for kesterite…

材料科学 · 物理学 2023-12-29 Anima Ghosh , R. Thangavel

GaAs nanowires with a 100% wurtzite structure are synthesized by the vapor-liquid-solid method in a molecular beam epitaxy system, using gold as a catalyst. We use resonant Raman spectroscopy and photoluminescence to determine the position…

介观与纳米尺度物理 · 物理学 2012-10-15 Bernt Ketterer , Martin Heiss , Marie J. Livrozet , Elisabeth Reiger , Anna Fontcuberta i Morral

We report the first quasiparticle calculations of the newly observed wurtzite polymorph of InAs and GaAs. The calculations are performed in the GW approximation using plane waves and pseudopotentials. For comparison we also report the study…

材料科学 · 物理学 2009-11-11 Z. Zanolli , F. Fuchs , J. Furthmueller , U. von Barth , F. Bechstedt

The structural, electronic and optical properties of nearly ferromagnetic compound HfZn2 have been studied using ab-initio technique. We have carried out the plane-wave pseudopotential approach within the framework of the first-principles…

材料科学 · 物理学 2016-05-17 Md. Atikur Rahman , Md. Afjalur Rahman , Md. Zahidur Rahaman

We have investigated the electronic structure of the dilute magnetic semiconductor (DMS) $Ga_{0.98}Mn_{0.02}P$ and compared it to that of an undoped $GaP$ reference sample, using hard X-ray photoelectron spectroscopy (HXPS) and hard X-ray…

Preparation of solid solutions represents an effective means to improve the photocatalytic properties of semiconductor-based materials. Nevertheless, the effects of site-occupancy disorder on the mixing stability and electronic properties…

材料科学 · 物理学 2018-12-11 Joel Shenoy , Judy N. Hart , Ricardo Grau-Crespo , Neil L. Allan , Claudio Cazorla

The GaAs/GaAsN interface band offset is calculated from first principles. The electrostatic potential at the core regions of the atoms is used to estimate the interface potential and align the band structures obtained from respective bulk…

材料科学 · 物理学 2008-06-27 Hannu-Pekka Komsa , Eero Arola , Eric Larkins , Tapio T. Rantala

We develop an atomistic, nearest-neighbor sp3s* tight-binding Hamiltonian to investigate the electronic structure of dilute bismide alloys of GaP and GaAs. Using this model we calculate that the incorporation of dilute concentrations of Bi…

材料科学 · 物理学 2011-12-12 Muhammad Usman , Christopher A. Broderick , Andrew Lindsay , Eoin P. O'Reilly

We compute the electronic band structure and optical properties of boron arsenide using the relativistic quasiparticle self-consistent $GW$ approach, including electron-hole interactions through solution of the Bethe-Salpeter equation. We…

材料科学 · 物理学 2019-06-07 John Buckeridge , David O. Scanlon

High energy-resolution fluorescence-detected X-ray absorption spectroscopy and density functional theory calculations were used to investigate the local bonding and electronic structure of Sc in epitaxial wurtzite-structure…

材料科学 · 物理学 2014-05-20 S. M. Knoll , M. Rovezzi , S. Zhang , T. B. Joyce , M. A. Moram

The anisotropy of the electronic structure of ternary nanolaminate V2GeC is investigated by bulk-sensitive soft x-ray emission spectroscopy. The measured polarization-dependent emission spectra of V L2,3, C K, Ge M1 and Ge M2,3 in V2GeC are…

The electronic structure and chemical bonding of the recently discovered inverse perovskite Sc3AlN, in comparison to ScN and Sc metal have been investigated by bulk-sensitive soft x-ray emission spectroscopy. The measured Sc L, N K, Al L1,…

First principle calculations were performed to study the ground state electronic properties of Barium titanate within the density functional theory (DFT). In our DFT computations, we used Vosko-Wilk-Nusair correlation energy functional and…

材料科学 · 物理学 2007-05-23 Hong-Jian Feng , Fa-Min Liu

Using the hybrid exchange-correlation functional within the density-functional theory, we have systematically investigated the structural and electronic properties of MO (M = Be, Mg, Ca, Sr, Ba, Zn, Cd) in binary rocksalt (B1), zincblende…

材料科学 · 物理学 2019-03-19 Jinying Yu , Mingke Zhang , Zihan Zhang , Shangwei Wang , Yelong Wu