Bichiral structure of ferroelectric domain walls driven by flexoelectricity
نویسندگان
چکیده
منابع مشابه
Formation of charged ferroelectric domain walls with controlled periodicity
Charged domain walls in proper ferroelectrics were shown recently to possess metallic-like conductivity. Unlike conventional heterointerfaces, these walls can be displaced inside a dielectric by an electric field, which is of interest for future electronic circuitry. In addition, theory predicts that charged domain walls may influence the electromechanical response of ferroelectrics, with stron...
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Ferroelectric domain walls are of great interest as elementary building blocks for future electronic devices due to their intrinsic few-nanometre width, multifunctional properties and field-controlled topology. To realize the electronic functions, domain walls are required to be electrically conducting and addressable non-destructively. However, these properties have been elusive because conduc...
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In this letter we obtain the finite-temperature structure of 180◦ domain walls in PbTiO3 using a quasi-harmonic–lattice dynamics approach. We obtain the temperature dependence of the atomic structure of domain walls from 0K up to room temperature. We also show that both Pb-centered and Ti-centered 180◦ domain walls are thicker at room temperature; domain wall thickness at T = 300K is about thre...
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Using the method of anharmonic lattice statics, we calculate the equilibrium structure of steps on 180° ferroelectric domain walls DWs in PbTiO3. We consider three different types of steps: i Ti–Ti step that joins a Ti-centered DW to a Ti-centered DW, ii Pb–Pb step that joins a Pb-centered DW to a Pb-centered DW, and iii Pb–Ti step that joins a Pb-centered DW to a Ti-centered DW. We show that a...
متن کاملEfficient photovoltaic current generation at ferroelectric domain walls.
We elucidate the mechanism of a newly observed photovoltaic effect which occurs in ferroelectrics with periodic domain structures. Under sufficiently strong illumination, domain walls function as nanoscale generators of the photovoltaic current. The steps in the electrostatic potential function to accumulate electrons and holes on opposite sides of the walls while locally reducing the concentra...
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ژورنال
عنوان ژورنال: Physical Review B
سال: 2012
ISSN: 1098-0121,1550-235X
DOI: 10.1103/physrevb.86.134102