Results 21 to 30 of about 11,585 (198)
Enhancing polarization by electrode-controlled strain relaxation in PbTiO3 heterostructures
APL Materials, 2016 A large remanent polarization close to theoretical value 80 μC/cm2 of bulk PbTiO3 is achieved in epitaxial heterostructures of (120–600)-nm-thick PbTiO3 films grown by pulsed laser deposition on (001) SrTiO3 substrate using a 100-nm-thick SrRuO3 bottom ...
J. Peräntie +4 more
doaj +1 more source
Soft Mode in cubic PbTiO3 by Hyper-Raman Scattering [PDF]
, 2012 Hyper-Raman scattering experiments allowed collecting the spectra of the lowest F1u-symmetry mode of PbTiO3 crystal in the paraelectric phase up to 930K as well as down to about 1K above the phase transition.
Gregora, I. +3 more
core +3 more sources
Efficacy of the DFT+U formalism for modeling hole polarons in perovskite oxides
, 2014 We investigate the formation of self-trapped holes (STH) in three prototypical perovskites (SrTiO3, BaTiO3, PbTiO3) using a combination of density functional theory (DFT) calculations with local potentials and hybrid functionals.
Erhart, Paul +3 more
core +1 more source
Unusual behaviour of the ferroelectric polarization in PbTiO$_{3}$/SrTiO$_{3}$ superlattices [PDF]
, 2005 Artificial PbTiO$_{3}$/SrTiO$_{3}$ superlattices were constructed using off-axis RF magnetron sputtering. X-ray diffraction and piezoelectric atomic force microscopy were used to study the evolution of the ferroelectric polarization as the ratio of PbTiO$
Cantoni, M. +8 more
core +3 more sources
Ferroelectricity in ultra-thin perovskite films
, 2005 We report studies of ferroelectricity in ultra-thin perovskite films with realistic electrodes. The results reveal stable ferroelectric states in thin films less than 10 \AA thick with polarization normal to the surface.
Alexie M. Kolpak +3 more
core +1 more source
Theory of PbTiO3, BaTiO3, and SrTiO3 Surfaces
, 1999 First-principles total-energy calculations are carried out for (001) surfaces of the cubic perovskite ATiO3 compounds PbTiO3, BaTiO3, and SrTiO3. Both AO-terminated and TiO2-terminated surfaces are considered, and fully-relaxed atomic configurations are ...
Meyer, B. +2 more
core +2 more sources
Glory of piezoelectric perovskites
Science and Technology of Advanced Materials, 2015 This article reviews the history of piezoelectric perovskites and forecasts future development trends, including Uchino’s discoveries such as the Pb(Mg1/3Nb2/3)O3–PbTiO3 electrostrictor, Pb(Zn1/3Nb2/3)O3–PbTiO3 single crystal, (Pb, La)(Zr, Ti)O3 ...
Kenji Uchino
doaj +1 more source
Coexistence of antiferrodistortive and ferroelectric distortions at the PbTiO$_3$ (001) surface
, 2004 The c(2$\times$2) reconstruction of (001) PbTiO$_3$ surfaces is studied by means of first principles calculations for paraelectric (non-polar) and ferroelectric ([001] polarized) films.
A. Munkholm +5 more
core +1 more source
Substantial bulk photovoltaic effect enhancement via nanolayering. [PDF]
, 2016 Spontaneous polarization and inversion symmetry breaking in ferroelectric materials lead to their use as photovoltaic devices. However, further advancement of their applications are hindered by the paucity of ways of reducing bandgaps and enhancing ...
Grinberg, Ilya +4 more
core +1 more source
, 2009 A first principles embedded cluster approach is used to calculate O chemical shielding tensors, sigma, in prototypical transition metal oxide ABO_3 perovskite crystals. Our principal findings are 1) a large anisotropy of sigma between deshielded sigma_x ~
Cohen M. H. +6 more
core +1 more source