Comparative Study on the Charge-Ordered and Mixed-Valence Phases of LuFe2O4 via First-Principles Calculations

2018 ◽  
Vol 31 (9) ◽  
pp. 2915-2923
Author(s):  
H. Si Abdelkader ◽  
A. Mahmoudi ◽  
H. I. Faraoun ◽  
G. Merad
RSC Advances ◽  
2016 ◽  
Vol 6 (53) ◽  
pp. 47753-47760 ◽  
Author(s):  
M. C. Righi ◽  
S. Loehlé ◽  
M. I. De Barros Bouchet ◽  
S. Mambingo-Doumbe ◽  
J. M. Martin

Sulfur reduces the adhesion and shear strength of iron more effectively than phosphorus. The surface chemistry, well described by first principles calculations, impacts macroscale tribological properties.


2010 ◽  
Vol 24 (24) ◽  
pp. 4851-4859
Author(s):  
KAIHUA HE ◽  
GUANG ZHENG ◽  
GANG CHEN ◽  
QILI CHEN ◽  
MIAO WAN ◽  
...  

The structural and electronic properties of BN(5, 5) and C(5, 5) nanotubes under pressure are studied by using first principles calculations. In our study range, BN(5, 5) undergoes obvious elliptical distortion, while for C(5, 5) the cross section first becomes an ellipse and then, under further pressure, is flattened. The band gap of BN(5, 5) decreases with increasing pressure, which is inverse to that of zinc blende BN, whereas for C(5, 5) the metallicity is always preserved under high pressure. The population of charge density indicates that intertube bonding is formed under pressure. We also find that BN(5, 5) may collapse, and a new polymer material based on C(5, 5) is formed by applying pressure.


2015 ◽  
Vol 91 (15) ◽  
Author(s):  
Sanjeev K. Nayak ◽  
Hans T. Langhammer ◽  
Waheed A. Adeagbo ◽  
Wolfram Hergert ◽  
Thomas Müller ◽  
...  

2012 ◽  
Vol 602-604 ◽  
pp. 870-873 ◽  
Author(s):  
Wei Zhao ◽  
Qing Yuan Meng

The adsorption of methane (CH4) molecule on the pristine and Al-doped (4, 8) graphene was investigated via the first-principles calculations. The results demonstrated that, in comparison to the adsorption of a CH4molecule on the pristine graphene sheet, a relatively stronger adsorption was observed between the CH4molecule and Al-doped graphene with a shorter adsorption distance, larger binding energy and more charge-transfer from the graphene surface to the CH4molecule. Therefore, the Al-doped graphene can be expected to be a novel sensor for the detection of CH4molecules in future applications.


2016 ◽  
Vol 90 (10) ◽  
pp. 1105-1113 ◽  
Author(s):  
M. Kamruzzaman ◽  
M. A. Helal ◽  
I. E. Ara ◽  
A. K. M. Farid Ul Islam ◽  
M. M. Rahaman

2003 ◽  
Vol 118 (19) ◽  
pp. 8621-8635 ◽  
Author(s):  
Rui-Hua Xie ◽  
Garnett W. Bryant ◽  
Lasse Jensen ◽  
Jijun Zhao ◽  
Vedene H. Smith

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