First principles calculation on the magnetic, optical properties and oxygen vacancy effect of CexY3−xFe5O12

2015 ◽  
Vol 106 (5) ◽  
pp. 052401 ◽  
Author(s):  
Xiao Liang ◽  
Jianliang Xie ◽  
Longjiang Deng ◽  
Lei Bi
2011 ◽  
Vol 213 ◽  
pp. 483-486
Author(s):  
Fang Gui ◽  
Shi Yun Zhou ◽  
Wan Jun Yan ◽  
Chun Hong Zhang ◽  
Xiao Tian Guo ◽  
...  

The electronic structure and optical properties of Fe1-xMnxSi2 have been studied using the first principle plane-wave pseudo-potential based on the density function theory. Substitutional doping is considered with Mn concentrations of x=0.0625, 0.125, 0.1875 and 0.25, respectively. The calculated results show that the volume of β-FeSi2 increase and the band gap increase with increasing of Mn.


Author(s):  
Hong Shen ◽  
Riyi Yang ◽  
Kun Xie ◽  
Zhiyuan Yu ◽  
Yuxiang Zheng ◽  
...  

The electronic structures and optical properties of novel 2D biphenylene and hydrogen-terminated nanoribbons of different widths which are cut from a layer of biphenylene were explored by first-principles calculation. The...


2020 ◽  
Vol 22 (46) ◽  
pp. 27163-27172
Author(s):  
Jongwoo Park ◽  
Yu-Ning Wu ◽  
Wissam A. Saidi ◽  
Benjamin Chorpening ◽  
Yuhua Duan

We explore via first-principles the impact of oxygen vacancies on the electronic structure and optical responses of ABO3−δ (A = La, Sr; B = Cr, Mn) perovskites, which provides a reference for optical gas sensing applications.


2010 ◽  
Vol 114 (2) ◽  
pp. 1052-1059 ◽  
Author(s):  
Yanlu Li ◽  
Weiliu Fan ◽  
Honggang Sun ◽  
Xiufeng Cheng ◽  
Pan Li ◽  
...  

2013 ◽  
Vol 6 (1) ◽  
pp. 11-27 ◽  
Author(s):  
M. A. Hadi ◽  
M. Roknuzzaman ◽  
F. Parvin ◽  
S. H. Naqib ◽  
A. K. M. A. Islam ◽  
...  

This is the first DFT-based first-principles prediction of the detailed optical and thermodynamic properties, including Vickers hardness and Fermi surface of 211 MAX phase Ti2GeC for which superconductivity (Tc~ 9.5 K) was reported very recently. The calculated structural properties are in excellent agreement with experiments. Our results on elastic parameters indicate a slight elastic anisotropy and brittleness of the compound. The chemical bonding is seen to be a combination of covalent, ionic and metallic nature. The rather stronger covalent bonding is responsible for its high Vickers hardness of 11.6 GPa. The investigated Fermi surface is formed mainly by the low-dispersive bands, which should be responsible for the presence of superconductivity in Ti2GeC. All the optical properties are evaluated and analyzed for two different polarization directions of incident photon. The temperature and pressure dependence of primitive cell volume, thermal expansion coefficient, specific heats, bulk modulus, and Debye temperature of Ti2GeC are derived from the quasi-harmonic Debye model with phononic effect and the various implications are discussed in details.  Keywords: First-principles calculation; Vickers hardness; Optical properties; Thermodynamic properties. © 2014 JSR Publications. ISSN: 2070-0237 (Print); 2070-0245 (Online). All rights reserved. doi: http://dx.doi.org/10.3329/jsr.v6i1.16604 J. Sci. Res. 6 (1), 11-27 (2014)


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