Persistence of polar distortion with electron doping in lone-pair driven ferroelectrics
نویسندگان
چکیده
منابع مشابه
Phase transition in Tl2TeO3: influence and origin of the thallium lone pair distortion.
A new modification of thallium tellurite, beta-Tl(2)TeO(3), has been synthesized by methanolothermal reaction, and its phase transition has been studied by single-crystal X-ray diffraction. At a temperature of 440(10) degrees C an irreversible phase transition from a monoclinic structure (beta-Tl(2)TeO(3): P2(1)/c (No. 14), Z = 4, a = 8.9752(18) A, b = 4.8534(6) A, c = 11.884(2) A, beta = 109.6...
متن کاملDependence of the emission properties of the germanium lone pair center on Ge doping of silica.
We present an experimental investigation regarding the changes induced by the Ge doping level on the emission profile of the germanium lone pair center (GLPC) in Ge doped silica. The investigated samples have been produced by the sol-gel method and by plasma-activated chemical vapor deposition and have doping levels up to 20% by weight. The recorded photoluminescence spectra show that the GLPC ...
متن کاملPolar distortions in hydrogen-bonded organic ferroelectrics
Alessandro Stroppa,1,* Domenico Di Sante,2 Sachio Horiuchi,3,4 Yoshinori Tokura,5,6 David Vanderbilt,7 and Silvia Picozzi1 1CNR-SPIN, L’Aquila, Italy 2University of L’Aquila, Physics Department, Via Vetoio, L’Aquila, Italy 3National Institute of Advanced Industrial Science and Technology (AIST) Tsukuba, Ibaraki 305-8562, Japan 4CREST, JST, Tsukuba 305-8562, Japan 5Department of Applied Physics,...
متن کاملStudy of lone pair description in molecules by the modified delocalized floating spherical Gaussian orbital method.
This research has been carried out to study and find a rather general description for a lone pairorbital in molecules. Since the orbital parameters must be manageable in advance, and correctgeometry of the molecule (bond lengths) is depend on the appropriate lone pair description; theFSGO method including optimization has been used to obtain orbital parameters and energy. Theproposed models for...
متن کاملField-induced percolation of polar nanoregions in relaxor ferroelectrics.
A first-principles-based effective Hamiltonian is used to investigate low-temperature properties of Ba(Zr,Ti)O(3) relaxor ferroelectrics under an increasing dc electric field. This system progressively develops an electric polarization that is highly nonlinear with the dc field. This development leads to a maximum of the static dielectric response at a critical field, E(th), and involves four d...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physical Review B
سال: 2016
ISSN: 2469-9950,2469-9969
DOI: 10.1103/physrevb.94.224107