Fingerprinting the vibrational signatures of dopants and defects in a fully random alloy: An ab initio case study of Si, Se, and vacancies in In0.5Ga0.5As

2020 ◽  
Vol 127 (20) ◽  
pp. 205704
Author(s):  
Haili Jia ◽  
Jingyang Wang ◽  
Paulette Clancy
Keyword(s):  
Ab Initio ◽  
Random Alloy

Could the increased structural versatility imposed by non-halogen ligands bring something new for polynuclear superhalogens? A case study on binuclear [Mg2L5]− (L = –OH, –OOH and –OF) anions

2017 ◽  
Vol 19 (39) ◽  
pp. 26986-26995 ◽  
Author(s):  
Ru-Fang Zhao ◽  
Le Yu ◽  
Fu-Qiang Zhou ◽  
Jin-Feng Li ◽  
Bing Yin
Keyword(s):  
Ab Initio ◽  
Dft Study ◽  
Structural Versatility

A combined ab initio and DFT study is performed in this work to explore the superhalogen properties of polynuclear structures based on the ligands of –OH, –OOH and –OF.

scholarly journals Ab Initio Calculation of Molecular Aggregation Effects: A Coumarin-343 Case Study

2013 ◽  
Vol 117 (43) ◽  
pp. 11072-11085 ◽  
Author(s):  
Donghyun Lee ◽  
Loren Greenman ◽  
Mohan Sarovar ◽  
K. Birgitta Whaley
Keyword(s):  
Ab Initio ◽  
Ab Initio Calculation ◽  
Molecular Aggregation ◽  
Coumarin 343

scholarly journals Use of Precession Electron and X Powder for solution and refinement of materials

2014 ◽  
Vol 70 (a1) ◽  
pp. C927-C927
Author(s):  
Marie Colmont ◽  
Lukas Palatinus ◽  
Marielle Huvé ◽  
Olivier Mentré ◽  
Pascal Roussel
Keyword(s):  
Ab Initio ◽  
Title Compound ◽  
Rietveld Method ◽  
Structural Type ◽  
A Posteriori ◽  
New Materials ◽  
X Ray ◽  
3D Tomography ◽  
System A

This communication will present the case study of ALa5O5(VO4)2 (A= Li, Na, K, Rb), example of the use of a combination of Precession Electron and X-ray Powder Data for the solution and the refinement of new materials. Indeed, an original structural type has been evidenced in the system (A, La, V, O) with A=Li, Na, K, Rb. Attempts to solve the structure ab initio on X-ray powder data were unsuccessful (more particularly because the powder was a mixture of the title compound and of unreacted precursors). The structure was finally solved by charge flipping using Precession Electron Data (3D tomography) on a nanocrystal, enabling a posteriori the good formulation of a pure powder. This powder was then classically refined by Rietveld method showing the correctness of the electron-solved structure. It crystallizes in a monoclinic unit cell with space group C2/m and a=20.2282(14) b=5.8639(4) c=12.6060(9) Å and β=117.64(1)0. The ALa5O5(VO4)2 structure is built of (OLa4) tetrahedral units creating Crenel-like 2D ribbons. These ribbons, surrounded by four isolated VO4 tetrahedra, are creating channels parallel to b axis in which A+ ions are located.

scholarly journals Are superhalogens without halogen ligand capable of transcending traditional halogen-based superhalogens? Ab initio case study of binuclear anions based on pseudohalogen ligand

AIP Advances ◽  
2015 ◽  
Vol 5 (6) ◽  
pp. 067143 ◽  
Author(s):  
Jin-Feng Li ◽  
Yin-Yin Sun ◽  
Hongcun Bai ◽  
Miao-Miao Li ◽  
Jian-Li Li ◽  
...  
Keyword(s):  
Ab Initio

scholarly journals Exact quantum dynamics background of dispersion interactions: case study for CH4·Ar in full (12) dimensions

2020 ◽  
Vol 22 (5) ◽  
pp. 2792-2802
Author(s):  
Gustavo Avila ◽  
Dóra Papp ◽  
Gábor Czakó ◽  
Edit Mátyus
Keyword(s):  
Potential Energy ◽  
Potential Energy Surface ◽  
Ab Initio ◽  
Quantum Dynamics ◽  
Energy Surface ◽  
Van Der Waals ◽  
Dispersion Interactions ◽  
Van Der Waals Complex ◽  
Exact Quantum

A full-dimensional ab initio potential energy surface is developed and utilized in full-dimensional variational vibrational computations for the CH4·Ar van-der-Waals complex.

When a nanoparticle meets a superhalogen: a case study with C60 fullerene

2016 ◽  
Vol 18 (28) ◽  
pp. 18739-18749 ◽  
Author(s):  
Celina Sikorska
Keyword(s):  
Ab Initio ◽  
C60 Fullerene ◽  
Theoretical Considerations

The ability of a selected nanoparticle to form stable systems with superhalogens (i.e. AlF4, AlCl4, MgF3, MgCl3, LiF2, LiCl2, and LiI2) is examined on the basis of theoretical considerations supported by ab initio calculations.

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