(Invited) Ferroelectric Materials Study Using First-Principles Calculations and Materials Informatics

2020 ◽  
Vol MA2020-01 (15) ◽  
pp. 1019-1019
Author(s):  
Hiroki Moriwake
Keyword(s):  
First Principles ◽  
Ferroelectric Materials ◽  
First Principles Calculations ◽  
Materials Informatics

Theoretical study of stability and electronic structure of the new type of ferroelectric materials XSnO3 (X = Mn, Zn, Fe, Mg)

2014 ◽  
Vol 28 (31) ◽  
pp. 1450224 ◽  
Author(s):  
Wei-Ling Zhu ◽  
Xing-Yuan Chen ◽  
Yu-Jun Zhao ◽  
Tian-Shu Lai
Keyword(s):  
Electronic Structure ◽  
First Principles ◽  
Chemical Potential ◽  
Theoretical Study ◽  
Ferroelectric Materials ◽  
Potential Range ◽  
First Principles Calculations ◽  
Equilibrium Conditions ◽  
New Type ◽  
Structure Calculations

Based on first-principles calculations and thermodynamic stability analysis, we find that MnSnO 3 and MgSnO 3 could be synthesized under restricted condition, as their bulk phases are stable in a limited chemical potential range with respect to the competing phases. It is also found that FeSnO 3 and ZnSnO 3 are unstable under thermodynamic equilibrium conditions. Electronic structure calculations suggest that the hybridization between TM (transition metal) and O could play important roles for magnetoelectric properties in the XSnO 3 (X = Mn, Zn, Fe), while the hybridization between Sn and O dominates in MgSnO 3.

Experiments and first principles calculations on the effects of hydrogen on the optical properties of ferroelectric materials

2009 ◽  
Vol 44 (21) ◽  
pp. 5768-5772 ◽  
Author(s):  
Ming Wu ◽  
Haiyou Huang ◽  
Bing Jiang ◽  
Wuyang Chu ◽  
Yanjing Su ◽  
...  
Keyword(s):  
Optical Properties ◽  
First Principles ◽  
Ferroelectric Materials ◽  
First Principles Calculations

Electronic Structure and X-ray Absorption Spectra of Rutile TiO2 Using First-Principles Calculations

2014 ◽  
Vol 52 (12) ◽  
pp. 1025-1029
Author(s):  
Min-Wook Oh ◽  
Tae-Gu Kang ◽  
Byungki Ryu ◽  
Ji Eun Lee ◽  
Sung-Jae Joo ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Absorption Spectra ◽  
First Principles ◽  
First Principles Calculations ◽  
Rutile Tio2 ◽  
X Ray ◽  
X Ray Absorption

To Bend or Not to Bend, the Dilemma of Multiple Bonds

2019 ◽  
Author(s):  
Michele Pizzocchero ◽  
Matteo Bonfanti ◽  
Rocco Martinazzo
Keyword(s):  
First Principles ◽  
2D Materials ◽  
Main Group ◽  
First Principles Calculations ◽  
Group 14 ◽  
Multiple Bonds ◽  
Main Group Elements ◽  
Structural Distortions

The manuscript addresses the issue of the structural distortions occurring at multiple bonds between high main group elements, focusing on group 14. These distortions are known as trans-bending in silenes, disilenes and higher group analogues, and buckling in 2D materials likes silicene and germanene. A simple but correlated \sigma + \pi model is developed and validated with first-principles calculations, and used to explain the different behaviour of second- and higher- row elements.

Thermodynamic Stability of Hexagonal and Rhombohedral Bn at Cvd Conditions from Van der Waals Corrected First Principles Calculations

2019 ◽  
Author(s):  
Henrik Pedersen ◽  
Björn Alling ◽  
Hans Högberg ◽  
Annop Ektarawong
Keyword(s):  
Thin Films ◽  
Thermodynamic Stability ◽  
First Principles ◽  
Thermal Equilibrium ◽  
Density Functional ◽  
Van Der Waals ◽  
Chemical Vapor ◽  
First Principles Calculations ◽  
Functional Theory ◽  
The Stability

Thin films of boron nitride (BN), particularly the sp<sup>2</sup>-hybridized polytypes hexagonal BN (h-BN) and rhombohedral BN (r-BN) are interesting for several electronic applications given band gaps in the UV. They are typically deposited close to thermal equilibrium by chemical vapor deposition (CVD) at temperatures and pressures in the regions 1400-1800 K and 1000-10000 Pa, respectively. In this letter, we use van der Waals corrected density functional theory and thermodynamic stability calculations to determine the stability of r-BN and compare it to that of h-BN as well as to cubic BN and wurtzitic BN. We find that r-BN is the stable sp<sup>2</sup>-hybridized phase at CVD conditions, while h-BN is metastable. Thus, our calculations suggest that thin films of h-BN must be deposited far from thermal equilibrium.

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