Results 71 to 80 of about 111,474 (320)
The origins of electromechanical indentation size effect in ferroelectrics
, 2009 Metals exhibit a size-dependent hardening when subject to indentation. Mechanisms for this phenomenon have been intensely researched in recent times. Does such a size-effect also exist in the electromechanical behavior of ferroelectrics?--if yes, what ...
Gharbi, M. +3 more
core +1 more source
Advanced Functional Materials, EarlyView.The THz drive of the Mott insulating state of a rare‐earth nickelate induces instantaneous insulator‐metal transition via quantum tunneling of valence electrons across the bandgap. This transition is pure electronic and highly non‐thermal, which may find its applications in ultrafast opto‐electronics with enhanced performance and minimal device size ...
Gulloo Lal Prajapati +7 more
wiley +1 more source
A phase-field model of relaxor ferroelectrics based on random field theory
, 2015 A mechanically coupled phase-field model is proposed for the first time to simulate the peculiar behavior of relaxor ferroelectrics. Based on the random field theory for relaxors, local random fields are introduced to characterize the effect of chemical ...
Wang, Shuai, Xu, Bai-Xiang, Yi, Min
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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
Advanced Functional Materials, EarlyView.This study uncovers a new switching mechanism in HfO2 and ZrO2, where the absence of a non‐polar layer along the a‐direction induces interaction between polar layers. Consequently, the switching barriers for growth are lower than those for nucleation in this direction, leading to a size‐dependent coercive field that matches experimental observations ...
Kun Hee Ye +6 more
wiley +1 more source
Molecularly Thin BaTiO3 Nanosheets with Stable Ferroelectric Response
Advanced Electronic Materials, 2023 2D ferroelectrics provide great promise for future electronics owing to their unique properties at 2D limit. Although simple perovskite oxides (such as BaTiO3 and PbTiO3) are an important target for 2D ferroelectrics, controlled synthesis of 2D ...
Kazuki Hagiwara +6 more
doaj +1 more source
Plasmonic Ferroelectric Modulators [PDF]
Journal of Lightwave Technology, 2019 Integrated ferroelectric plasmonic modulators featuring large bandwidths, broad optical operation range, resilience to high temperature and ultracompact footprint are introduced. Measurements show a modulation bandwidth of 70 GHz and a temperature stability up to 250 C.
Andreas Messner +9 more
openaire +3 more sources
A Novel Approach to Implementing Artificial Thalamic Neurons with Ferroelectric Transistors
Advanced Functional Materials, EarlyView.Artificial neurons created using CMOS technology often require a large number of transistors and capacitors. This study introduces an artificial thalamic neuron that employs only five CMOS compatible ferroelectric transistors. The manufactured thalamic neuron demonstrates leaky integrate‐and‐fire‐or‐burst (LIFB) functionalities, featuring self ...
Andreas Grenmyr +7 more
wiley +1 more source
Crystals, 2023 Relaxor ferroelectrics play a vital role as functional components in electromechanical devices. The observation of micro-scale domain structure evolution under electric bias in relaxor ferroelectrics has posed challenges due to their complex domain ...
Kai Li +11 more
doaj +1 more source
Advances in ab-initio theory of Multiferroics. Materials and mechanisms: modelling and understanding
, 2012 Within the broad class of multiferroics (compounds showing a coexistence of magnetism and ferroelectricity), we focus on the subclass of "improper electronic ferroelectrics", i.e.
A. Girlando +204 more
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