Concept
Ferroélectricité
Publications associées (695)
Synthesis of polysiloxane elastomers modified with sulfonyl side groups and their electromechanical response
Holger Frauenrath, Yauhen Sheima
Dielectric elastomer transducers are elastic capacitors that respond to mechanical or electrical stress. They can be used in applications such as millimeter-sized soft robots and harvesters of the energy contained in ocean waves. The dielectric component o ...
ROYAL SOC CHEMISTRY2023How to Make Elastomers Piezoelectric?
Piezoelectrics play a significant role in modern electronics and electric devices. Thermal or mechanical stress on such materials induces a change in polarization generating an electric response, which is the sole effect of why they are so interesting. How ...
WILEY2023Energy-Efficient Electronic Functions Based on the Co-integration of 2D and Ferroelectric Materials
The digital revolution has significantly transformed our world over the past decades, driven by the scaling of transistor dimensions and the exponential increase in computation power. However, as the CMOS scaling era approaches its end, the semiconductor i ...
EPFL2023Covalent bonded bilayers from germanene and stanene with topological giant capacitance effects
The discovery of twisted bilayer graphene with tunable superconductivity has diverted great focus at the world of twisted van der Waals heterostructures. Here we propose a paradigm for bilayer materials, where covalent bonding replaces the van der Waals in ...
NATURE PORTFOLIO2023Induced giant piezoelectricity in centrosymmetric oxides
Paul Muralt, Dragan Damjanovic, Vasiliki Tileli, Mahmoud Hadad, Lukas Riemer, Daesung Park
Piezoelectrics are materials that linearly deform in response to an applied electric field. As a fundamental prerequisite, piezoelectric materials must have a noncentrosymmetric crystal structure. For more than a century, this has remained a major obstacle ...
2022Microscopic picture of paraelectric perovskites from structural prototypes
Nicola Marzari, Giovanni Pizzi, Michele Kotiuga, Boris Kozinsky
We highlight with first-principles molecular dynamics the persistence of intrinsic < 111 > Ti off-centerings for BaTiO3 in its cubic paraelectric phase. Intriguingly, these are inconsistent with the Pm (3) over barm space group often used to atomistically ...
AMER PHYSICAL SOC2022Negative Capacitance in HfO2 Gate Stack Structures With and Without Metal Interlayer
Mihai Adrian Ionescu, Igor Stolichnov, Ali Saeidi, Eamon Patrick O'Connor, Francesco Bellando, Matteo Cavalieri, Carlotta Gastaldi
In this work, we experimentally explore and compare FET gate stacks with and without an inner metal plane between a linear dielectric (SiO2) and a ferroelectric layer (Si-doped HfO2) operating in the negative capacitance (NC) regime. The use of nanosecond- ...
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC2022Pyroelectric material property considerations for x-ray generation
The method of generating x-rays using the pyroelectric effect has garnered interest for applications that desire portability and low power consumption, particularly for real-time in-field and on-line analyses. However, the x-ray intensity produced by this ...
2022Field-induced ultrafast modulation of Rashba coupling at room temperature in ferroelectric alpha-GeTe(111)
Rashba materials have appeared as an ideal playground for spin-to-charge conversion in prototype spintronics devices. Among them, alpha-GeTe(111) is a non-centrosymmetric ferroelectric semiconductor for which a strong spin-orbit interaction gives rise to g ...
NATURE PORTFOLIO2022Stretchable High Response Piezoelectric Elastomers Based on Polable Polynorbornene Fillers in a Polydimethylsiloxane Matrix
To advance the field of piezoelectrics, it is desirable to find materials that combine high piezoelectricity with high elasticity. Applications such as self-sensors, stretchable electronics, soft robots, and energy harvesting would benefit tremendously. Ho ...
WILEY-V C H VERLAG GMBH2022