Results 61 to 70 of about 388,640 (201)

Flexoelectric effect in the reversal of self-polarization and associated changes in the electronic functional properties of bifeo3 thin films

, 2018
Flexoelectricity can play an important role in the reversal of the self-polarization direction in epitaxial BiFeO3 thin films. The flexoelectric and interfacial effects compete with each other to determine the self-polarization state.
Jong-Gul Yoon, Tae Kwon Song, Sang Don Bu, Daesu Lee, Sang Mo Yang, Byung Chul Jeon, Myang Hwan Lee, Tae Won Noh, Seung Chul Chae, Jin-Seok Chung   +9 more
core   +1 more source

Flexoelectricity versus electrostatics in polar nematic liquid crystals

Physical Review E
Polar nematic liquid crystals have two special features, compared with conventional nematic liquid crystals. First, because of flexoelectricity, the combination of polar order and splay reduces the free energy. Second, because of electrostatics, any splay generates a bound charge density, which increases the free energy.
Lincoln Paik, Jonathan V. Selinger
openaire   +3 more sources

Colossal Modulation of Mechanical Resonance with temperature in single‐Crystalline SrTiO3 Microbridges Integrated on Silicon

Advanced Electronic Materials, EarlyView.
The structural characteristics and resonant mechanical behavior of suspended microbridges comprised of single‐crystalline SrTiO3 that has been grown on silicon are presented. Due to differences in thermal expansion between the SrTiO3 and silicon, we find that the resonant frequencies of the microbridges are not only enhanced, but also hyper‐sensitive ...
Deepa Guragain, Laveeza Ahmad, Alexander A. Puretzky, Carson Hester, Zheng Hui Lim, Richard Le, Sundeep Mukherjee, Ye Cao, Joseph H. Ngai   +8 more
wiley   +1 more source

Precise Tuning of Flexoelectricity in SrTiO3 by Ion Irradiation

Advanced Science
Flexoelectric coefficient is a tetradic and its introduction enables centrosymmetric materials to exhibit piezoelectricity. However, the flexoelectric paradigm currently lacks a strategy to effectively tune the strain gradient for optimal electro ...
Shuai Nan, Shipu Xu, Yunlong Ren, Xin Yuan, Yuhua Ma, Pengfei Zhai, Fuxiang Zhang   +6 more
doaj   +1 more source

Controllable Topological Domain Arrays in Periodically Wrinkle‐Patterned Pb(Zr0.2,Ti0.8)O3 Thin Films

Information &Functional Materials, EarlyView.
We demonstrate reversible mechanical and electrical control of ordered center‐type topological domains in wrinkled PZT films, with high‐conductivity channels at domain cores, enabling multifield manipulation for future topological devices. ABSTRACT Ferroelectric topological domain textures hold promise as key building blocks for next‐generation ...
Jiahui Zhao, Houlin Zhou, Yuyin Yang, Guo Tian, Huiyang Liu, Jiaqi Zhang, Fengbo Yan, Shuai Ning, Hua Fan, Zhen Fan, Ji‐Yan Dai, Jun‐Ming Liu, Xingsen Gao   +12 more
wiley   +1 more source

Bistable nematic liquid crystal device with flexoelectric switching

, 2006
Motivated generally by potential applications in the liquid crystal display industry [8,35], and specifically by recent experimental, theoretical and numerical work [6,7,13,14,21,25,30,31], we consider a thin film of nematic liquid crystal (NLC ...
RICHARDSON, Giles, CUMMINGS, L.J.
core   +1 more source

Topological transition from a hopfion to a toron via flexoelectric self-polarization in chiral liquid crystals

Physical Review Research
The presence of topological defects in apolar chiral liquid crystals causes orientational distortions, leading to nonuniform strain. This nonuniform strain generates an electric polarization response due to the flexoelectric effect, which induces an ...
Paul Leask
doaj   +1 more source

Strain-engineered flexoelectricity and oxygen vacancy dynamics for modulating interfacial charge transport in BaTiO3

Journal of Materiomics
Strain engineering has emerged as a powerful strategy for tailoring the ferroelectric properties and interfacial charge transport behaviors in complex oxide heterostructures. However, the underlying coupling mechanisms between strain-induced polarization
Guoyang Shen, Zhibin Wen, Zhiguo Wang, Longlong Shu   +3 more
doaj   +1 more source

A Polar Topology Network Induces Elastic Stiffening in Ferroelectric Oxide Superlattices

Small, EarlyView.
The periodicity in BiFeO3/SrTiO3 superlattices tunes the system into a dense, elastically constrained polar texture state. This topology‐rich regime reveals a collective mechanical response in which interactions among polar topological defects restrict local deformations, producing a pronounced elastic stiffening.
Mohammad Moein Seyfouri, Peiran Tong, Yoonah Ko, Menghui Xia, Qi Zhang, Zijian Hong, Bin Xu, Seungbum Hong, He Tian, Nagarajan Valanoor, Daniel Sando   +10 more
wiley   +1 more source

Flexoelectric polarizing and control of a ferromagnetic metal

Nature Physics
Abstract Electric polarization is well defined only in insulators not metals, and there is no general scheme to induce and control bulk polarity in metals. Here we circumvent this limitation by utilizing a pseudo-electric field generated by inhomogeneous lattice strain, namely a flexoelectric field, as a means of ...
Wei Peng, Se Young Park, Chang Jae Roh, Junsik Mun, Hwiin Ju, Jinkwon Kim, Eun Kyo Ko, Zhengguo Liang, Sungsoo Hahn, Jinfeng Zhang, Ana M. Sanchez, David Walker, Steven Hindmarsh, Liang Si, Yong Jin Jo, Yongjoo Jo, Tae Heon Kim, Changyoung Kim, Lingfei Wang, Miyoung Kim, Jong Seok Lee, Tae Won Noh, Daesu Lee   +22 more
openaire   +1 more source