Article
Materials Science, Multidisciplinary
Ekta Singh, Henrik Beccard, Zeeshan H. Amber, Julius Ratzenberger, Clifford W. Hicks, Michael Ruesing, Lukas M. Eng
Summary: The paper investigates the effect of uniaxial stress on the conductivity of domain walls in single crystal lithium niobate. An asymmetry in conductivity of domain walls was observed, with negatively screened walls becoming more conductive while positively screened walls showed a decrease in conductivity. Furthermore, smaller compressive stresses were found to increase the current in domain walls.
Article
Physics, Applied
C. J. McCluskey, A. Kumar, A. Gruverman, I. Luk'yanchuk, J. M. Gregg
Summary: Ferroelectric domain walls usually have enhanced electrical conductivity, but in lead germanate, head-to-head and tail-to-tail walls are electrically insulating. Recent studies suggest that this is because polar divergence is obviated by domain bifurcation and suspected local dipolar rotation. A study using tomographic piezoresponse force microscopy on triglycine sulfate confirms that mutual domain bifurcation and suspected local dipolar rotation are not unique to lead germanate and may be widely present in other uniaxial ferroelectrics.
APPLIED PHYSICS LETTERS
(2023)
Article
Materials Science, Ceramics
Menghan Ao, Yiming Li, Qilan Zhong, Yan Cheng, An Quan Jiang
Summary: We have developed an etching technique based on solid-state reaction and wet solution corrosion, using CMOS-compatible SiO2 masks to fabricate high-precision LiNbO3 nanodevice arrays. This technique allows for the large-scale fabrication of LiNbO3 nanodevices with good polarization retention and reduced imprint effect.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
B. Sturman, E. Podivilov
Summary: Domain wall conductivity, as a general ferroelectric phenomenon, can compensate the bound polarization charge on domain walls by free charges from electrodes, which effectively reduces the domain formation energy and resolves the issue of excessive depolarization energy.
Article
Nanoscience & Nanotechnology
Xiaobing Hu, Xu Hou, Yan Zhang, Xiaojie Chai, Jianwei Lian, Chao Wang, Jie Wang, Jun Jiang, Anquan Jiang
Summary: Highly conductive domain walls in insulating ferroelectric LiNbO3 (LNO) single-crystal thin films with atomic smoothness are attractive for use in high-density integration of the ferroelectric domain wall random access memory (DWRAM). However, downscaling of the memory size to the nanoscale could cause poor polarization retention. The cell, which has a lateral length above a critical size of 105 nm, is found to be a mixture of two phases across the cell area, with inner area suffering from poor polarization retention and outer periphery domains showing good retention but requiring a much higher coercive field.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Physics, Multidisciplinary
Xiao Zhuang, An Quang Jiang
Summary: Conducting domain walls created through the local domain 180 degrees reversal within LiNbO3 mesa-like cells fabricated at the surface of a single-crystal LiNbO3 thin film have enabled the development of ferroelectric domain wall memories, transistors, and sensors. The diodes at interfaces not only can perform logical functions for in-memory computing, but can also work as embedded selectors for the fabrication of crossbar arrays of the memories. A non-destructive estimation method has been developed to tailor the onset voltages of the diodes through the regulation of interfacial-layer thicknesses within various domain wall nanodevices.
Article
Computer Science, Interdisciplinary Applications
Mohammadreza Amjadian, Seyed Masood Mostafavi, Jiangbo Chen, Zahra Kavehvash, Jingyi Zhu, Lidai Wang
Summary: This paper proposes a novel super-resolution volumetric photoacoustic microscopy based on structured illumination theory, utilizing optical excitation and Fourier-domain reconstruction algorithm to improve lateral resolution and reduce computational load. Experimental results demonstrate significant enhancements in lateral resolution and signal-to-noise ratio of the imaging system.
IEEE TRANSACTIONS ON MEDICAL IMAGING
(2021)
Article
Materials Science, Multidisciplinary
A. Y. Yassin
Summary: By blending LiClO4 filler with PVA/PVP host matrix, the structural, thermal, and dielectric properties of the prepared composite material were improved, making it suitable for manufacturing lithium polymer batteries and high-performance energy storage devices.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2021)
Article
Materials Science, Multidisciplinary
A. R. Zanatta
Summary: This study presents a thorough investigation of the Egap of the congruent ferroelectric LiNbO3 (Z-cut) single crystal at room-temperature and in the temperature range of approximately 80-800 K.
RESULTS IN PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Anoop Pratap Singh, O. P. Pandey, Puneet Sharma
Summary: Z-type ferrites with Bi2O3 and SiO2 additives were prepared, and their electrical transport properties were investigated by impedance spectroscopy. The results showed that the additives segregated along the grain boundaries and had their own resistance, which was confirmed by the peak broadening in the impedance spectra. The study also found that the dynamic process of charge carriers was temperature dependent.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Engineering, Electrical & Electronic
V. Sanjay, K. M. Rajashekara, Vinayak Pattar, M. V. Murugendrappa
Summary: This study evaluates the electrical and dielectric properties of poly (vinyl alcohol)-tellurium (PVA-Te) nano-composite films. The dispersion and functional groups were characterized using X-ray diffraction and Fourier transmission infrared-attenuated total reflection spectroscopic studies. The surface morphology was studied using scanning electron microscope and high-resolution-transmission electron microscope. These composites show potential applications in microwave and microelectronic industries.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Multidisciplinary Sciences
Daehun Lee, Shahin Jahanbani, Jack Kramer, Ruochen Lu, Keji Lai
Summary: Implementing MEMS resonators requires detailed microscopic understanding and imaging. In this study, nanoscale imaging of a high-frequency overtone acoustic resonator was achieved, with excellent spatial resolution and displacement sensitivity. Various modes and imperfections were visualized and analyzed, contributing to the design and characterization of MEMS resonators with improved performance for various applications.
NATURE COMMUNICATIONS
(2023)
Article
Physics, Applied
Xinyu Li, Guangyuan Li, Zhihang Zhang, Wenjing Zhai, Wenhao Zheng, Liufang Chen, Lin Lin, Xiaohui Zhou, Zhibo Yan, J. -M. Liu
Summary: Habituation, a basic form of behavioral plasticity, is important for organisms to adjust their behaviors in response to external stimulation. However, few devices can mimic habituation, which includes opposite responses to the same repeated stimulus. In this study, a device of Au/LiTaO3/Pt was fabricated to demonstrate synaptic plasticity and habituation behavior, which was dependent on stimulus intensity and frequency. The habituation behavior was found to originate from the evolution of conductive domain walls in LiTaO3 ferroelectric.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Physical
Bappa Sona Kar, M. N. Goswami, P. C. Jana
Summary: La2O3-substituted polycrystalline 0.56BiFeO(3)-0.44BaTiO(3) ceramics were prepared via conventional solid-state reaction process, with investigations on crystal structure, dielectric, magnetic, and impedance properties. La substitution enhanced the multiferroic nature of the materials, as evidenced by improved energy storage density and remnant magnetization.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Optics
Xiaoliang Wang, Qiang Cao, Ruonan Wang, Xiangdong Cao, Sheng Liu
Summary: We demonstrate the growth of domains in lithium niobate crystal using a focused infrared femtosecond laser, without any displacement or additional treatment. The process involves modified domain generation, thermoelectric field formation, domain inversion, and domain growth. The length of domain growth depends on drive energy and drive time, reaching up to 155 μm. This laser-driven approach offers a rapid fabrication route for tailored functional materials.
