High Dielectric Constants in BaTiO3 Due to Phonon Mode Softening Induced by Lattice Strains: First Principles Calculations

H Guo, JS Baker, W Wu, KL Choy - Advanced Physics …, 2023 - Wiley Online Library
High‐dielectric‐constant materials attract much attention due to their broad applications in
modern electronics. Barium titanate (BTO) is an established material possessing an …

Defects in titanates

A Stashans - International journal of nanotechnology, 2004 - inderscienceonline.com
Electronic, structural and optical properties of titanates (BaTiO3, SrTiO3, CaTiO3 and
PbTiO3) containing different point defects are reviewed and discussed in the present work …

A quantum mechanical study of La-doped Pb (Zr, Ti) O3

A Stashans, F Maldonado - Physica B: Condensed Matter, 2007 - Elsevier
Lanthanum-modified Pb (Zr, Ti) O3 (PZT) crystals have been investigated applying a
quantum-mechanical approach based on the Hartree–Fock theory. A morphotropic phase …

Oxygen-vacancy defects on BaTiO3 (001) surface: a quantum chemical study

C Duque, A Stashans - Physica B: Condensed Matter, 2003 - Elsevier
A quantum-chemical study of technologically important BaTiO3 crystal and oxygen-vacancy
defects on its (001) surface is reported in the present work. The computations are made …

Oxgen-vacancy defects in PbTiO3 and BaTiO3 crystals: a quantum chemical study

S Serrano, C Duque, P Medina… - Advanced Organic and …, 2003 - spiedigitallibrary.org
We study effects produced by an O vacancy and F center in cubic and tetragonal lead
titanate (PbTiO 3) crystals as well as barium titanate (BaTiO 3)(001) surface. Displacements …

Structural and optical properties of F-center defects on barium titanate< 001> surface

C Duque, A Stashans - Materials Letters, 2003 - Elsevier
Structural and optical properties of F centers (two electrons trapped by an oxygen vacancy)
on the BaTiO3〈 001〉 surface are investigated using the quantum-chemical approach. The …

H atom in BaTiO3 and CaTiO3 crystals: structure, electronic properties, and diffusion

J Chimborazo, M Castillo, C Velasco… - … and Inorganic Optical …, 2003 - spiedigitallibrary.org
We investigate effects that an H impurity produces upon the geometry and the electronic
structure in the BaTiO 3 and CaTiO 3 crystals considering several lattices of these materials …

[PDF][PDF] A fresh look at the structural, ferroelectric and photoluminescent properties in perovskites

J Andrés, VM Longo, LS Cavalcante… - … , Types and Efficacy, 2011 - researchgate.net
The perovskite based materials ABO3 are in huge expansion worldwide. Fundamental
scientific studies on perovkite materials have been carried out intensively due to their unique …

First-principles investigation of Fe-doped MgSiO3-ilmenite

A Stashans, K Rivera, HP Pinto - Physica B: Condensed Matter, 2012 - Elsevier
First principles density functional theory and generalised gradient approximation (GGA)
have been exploited to investigate Fe-doped ilmenite-type MgSiO3 mineral. Strong electron …

Quantum chemical modelling of Al-doped PZT crystals

S Serrano, A Celi, A Stashans - International journal of …, 2006 - inderscienceonline.com
Complete analysis of the electronic and structural changes of the lead zirconate titanate
(PZT) crystal due to aluminium impurity doping is done based on the computationally …