Results 71 to 80 of about 191,244 (266)
Absence of Critical Thickness in an Ultrathin Improper Ferroelectric Film [PDF]
Phys. Rev. Lett. 102, 107601 (2009), 2008 We study the ferroelectric stability and surface structural properties of an oxygen-terminated hexagonal YMnO$_3$ ultra-thin film using density functional theory. Under an open circuit boundary condition, the ferroelectric state with the spontaneous polarization normal to the (0001) surface, is found to be metastable in a single domain state despite ...
arxiv +1 more source
Mutual Insight on Ferroelectrics and Hybrid Halide Perovskites: A Platform for Future Multifunctional Energy Conversion [PDF]
Advances in Materials, 2017 An insight into the analogies, state‐of‐the‐art technologies, concepts, and prospects under the umbrella of perovskite materials (both inorganic–organic hybrid halide perovskites and ferroelectric perovskites) for future multifunctional energy conversion
R. Pandey +7 more
semanticscholar +1 more source
The rise of 2D materials/ferroelectrics for next generation photonics and optoelectronics devices
APL Materials, 2022 Photonic and optoelectronic devices have been limited in most two-dimensional (2D) materials. Researchers have attempted diverse device structures, such as introducing some ferroelectric materials to form new hybrid materials that could improve the ...
Linghua Jin +10 more
doaj +1 more source
Appearance of ferroelectricity in thin films of incipient ferroelectric [PDF]
, 2007 The consideration of size-induced ferroelectric-paraelectric phase transition for conventional and incipient ferroelectrics thin films with perovskite structure was carried out in phenomenological theory framework of Ginsburg-Landau-Devonshire. The more general form of surface free energy expansion that includes intrinsic surface stress tensor, surface
arxiv +1 more source
On the Physics of Ferroelectrics
Science Progress, 2003 The main physical properties of ferroelectric crystals are described, and the macroscopic and microscopic viewpoints are discussed along with some applications, such as in capacitors and nonlinear optics. The emphasis is on physical understanding, while the mathematical level is kept to a minimum or supplemented by graphical representations to make ...
openaire +3 more sources
Theory of electronic ferroelectricity [PDF]
Physical Review B, 1996 We present a theory of the linear and nonlinear optical characteristics of the insulating phase of the Falicov-Kimball model within the self-consistent mean-field approximation. The Coulomb attraction between the itinerant d-electrons and the localized f-holes gives rise to a built-in coherence between the d and f-states, which breaks the inversion ...
T. Portengen, L. J. Sham, Th. Östreich
openaire +4 more sources
Effect of a built-in electric field in asymmetric ferroelectric tunnel junctions [PDF]
, 2013 The contribution of a built-in electric field to ferroelectric phase transition in asymmetric ferroelectric tunnel junctions is studied using a multiscale thermodynamic model. It is demonstrated in details that there exists a critical thickness at which an unusual ferroelectric-\'\' polar non-ferroelectric\rq\rq phase transition occurs in asymmetric ...
arxiv +1 more source
General Theory for the Ferroelectric Polarization Induced by Spin-Spiral Order [PDF]
Phys. Rev. Lett. 107, 157202 (2011), 2011 The ferroelectric polarization of triangular-lattice antiferromagnets induced by helical spin-spiral order is not explained by any existing model of magnetic-order-driven ferroelectricity. We resolve this problem by developing a general theory for the ferroelectric polarization induced by spin-spiral order and then by evaluating the coefficients needed
arxiv +1 more source
Ferroelectricity and Self-Polarization in Ultrathin Relaxor Ferroelectric Films [PDF]
Scientific Reports, 2016 AbstractWe report ferroelectricity and self-polarization in the (001) oriented ultrathin relaxor ferroelectric PMN-PT films grown on Nb-SrTiO3, SrRuO3 and La0.7Sr0.3MnO3, respectively. Resistance-voltage measurements and AC impedance analysis suggest that at high temperatures Schottky depletion width in a 4 nm thick PMN-PT film deposited on Nb-SrTiO3 ...
Diyang Zhao +9 more
openaire +2 more sources
Far infrared and terahertz spectroscopy of ferroelectric soft modes in thin films: A review [PDF]
Ferroelectrics 503, 19-44 (2016), 2016 Far-infrared and terahertz spectroscopy of ferroelectric soft and central modes in thin films on substrates is reviewed. In addition to classical displacive proper ferroelectrics, also incipient and relaxor ferroelectrics and multiferroics are discussed.
arxiv +1 more source