Article
Physics, Applied
Shelby S. Fields, Sean W. Smith, Samantha T. Jaszewski, Takanori Mimura, Diane A. Dickie, Giovanni Esteves, M. David Henry, Steve L. Wolfley, Paul S. Davids, Jon F. Ihlefeld
Summary: The study investigated the mechanisms leading to wake-up and fatigue in ferroelectric hafnium zirconium oxide thin film devices with symmetric RuO2 electrodes. It was found that wake-up involves transformations from the tetragonal to the orthorhombic phase and domain depinning, while fatigue is primarily driven by domain pinning. The near-zero measured switchable polarization in fatigued devices indicates the presence of immobile domains.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Christian M. Moehle, Prasanna K. Rout, Nayan A. Jainandunsing, Dibyendu Kuiri, Chung Ting Ke, Di Xiao, Candice Thomas, Michael J. Manfra, Michal P. Nowak, Srijit Goswami
Summary: In this study, tunneling spectroscopy measurements were conducted at the two ends of planar Josephson junctions to probe the effects of the magnetic vector potential on the energy spectrum of Andreev bound states (ABS). The results showed that the local superconducting phase difference arising from the vector potential is equal in magnitude and opposite in sign at the two ends, indicating the presence of localized ABS near the tunnel barriers. The experiments, combined with microscopic simulations, demonstrated the potential of using the local phase difference to estimate the relative position of localized ABS separated by a few hundred nanometers.
Article
Chemistry, Multidisciplinary
Christian M. Moehle, Prasanna K. Rout, Nayan A. Jainandunsing, Dibyendu Kuiri, Chung Ting Ke, Di Xiao, Candice Thomas, Michael J. Manfra, Michal P. Nowak, Srijit Goswami
Summary: In this study, tunneling spectroscopy measurements were used to investigate the energy spectrum of Andreev bound states (ABSs) in planar Josephson junctions (JJs). The effects of magnetic vector potential on the ABS spectrum were studied, and it was found that the local superconducting phase difference arising from the vector potential is equal in magnitude and opposite in sign at the two ends of the JJs. This finding suggests that the relative position of localized ABSs separated by a few hundred nanometers can be estimated using the local phase difference.
Article
Materials Science, Multidisciplinary
Sushree Ipsita, Sunil Ku. Sahu, P. K. Mahapatra
Summary: An in-depth theoretical investigation was conducted on four single-barrier Ferroelectric Tunnel Junctions (FTJs) to study the role of the emitter and collector electrode materials. It was found that direct quantum tunneling is the predominant conduction mechanism in the studied systems for bias range of 0-1.2 V. The tunneling electro-resistance ratio (TER) is determined by the screening charge density and the net charge density in the barrier layer.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Chemistry, Multidisciplinary
Yonas Assefa Eshete, Kyungrok Kang, Seunghun Kang, Yejin Kim, Phuong Lien Nguyen, Deok-Yong Cho, Yunseok Kim, Jaekwang Lee, Suyeon Cho, Heejun Yang
Summary: This study reports the atomic and electric manipulation of ferroelectric polymorphs in Mo1-xWxTe2, achieving tunable polar lattice structures and stable ferroelectricity at high temperatures. The ferroelectric switching in this atomically thin material can withstand high charge carrier densities.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Zongqi Bai, Sen Zhang, Yang Xiao, Miaomiao Li, Fang Luo, Jie Li, Shiqiao Qin, Gang Peng
Summary: Van der Waals heterojunctions, formed by stacking two-dimensional materials, provide a new way for designing functional devices and exploring novel physical phenomena. In this study, bilayer graphene/WS2/metal heterojunctions with vertical architecture were fabricated and their tunneling current-bias voltage properties were investigated. The results showed that the properties of GWMHs can be tuned by a large magnitude and exhibit potential for high-power field-effect transistors and next-generation logic electronic devices.
Article
Multidisciplinary Sciences
Zixiao Wang, Julio L. Palma, Hui Wang, Junzhi Liu, Gang Zhou, M. R. Ajayakumar, Xinliang Feng, Wei Wang, Jens Ulstrup, Alexei A. Kornyshev, Yueqi Li, Nongjian Tao
Summary: Single-molecule electrochemical science has made significant advancements in molecular electronics functions, particularly rectification. This article proposes an experimental and theoretical strategy for in situ rectification in symmetric molecular structures in an electrochemical environment. By independently controlling the electrochemical potential of the tip and substrate electrodes, single-molecule rectification is observed. The polarity and amplitude of the rectification can be tuned by varying the energy and electrolyte concentration. The study provides a promising approach for building controllable single-molecule rectifying devices without the need for asymmetric molecular structures.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Physics, Multidisciplinary
Sushree Ipsita, Sunil Ku Sahu, P. K. Mahapatra
Summary: The role of electrodes in composite barrier Ferroelectric Tunnel Junctions (FTJs) has been investigated, and it has been found that the tunneling current is controlled by the potential drop in the electrodes, which depends on the ratio of their screening length to permittivity. Under certain conditions, the Tunneling electro resistance ratio (TER) becomes significant, leading to an increase in the tunneling current. Among the studied systems, the //Pt/20 angstrom STO/24 angstrom BTO/SRO system shows promising current density and TER, making it a potential candidate for efficient application in memory devices.
Article
Chemistry, Physical
Dong Wang, Pengfei Wang, Borong Lu, Ke Ye, Kai Zhu, Qian Wang, Jun Yan, Guiling Wang, Dianxue Cao
Summary: The study developed a novel carbon-based electrode material that functions as both an anode and cathode for potassium-ion hybrid capacitors, demonstrating excellent energy storage performance. The developed symmetrical freestanding potassium-ion hybrid capacitors exhibit impressive performance in terms of power density, energy density, and cyclic stability.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Qinqin Wang, Ti Xie, Nicholas A. Blumenschein, Zhihao Song, Aubrey T. Hanbicki, Michael A. Susner, Benjamin S. Conner, Tony Low, Jian-Ping Wang, Adam L. Friedman, Cheng Gong
Summary: This study demonstrates high-performance FTJs constructed with graphene and a two-dimensional ferroelectric material, showing high tunneling electroresistance and gate tunability. This structure has potential applications in energy-efficient non-volatile memories and computing.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
L. N. Jiang, Yun-Peng Wang, Y. Zhu, X. F. Han
Summary: The long electrical screening length of an insulator allows changes in local ferroelectric polarization to affect the electrostatic potential across the entire insulating region, enhancing the tunneling electroresistance effect. First-principles calculations of multiferroic tunnel junctions reveal a unique local ferroelectric polarization at the interface, leading to an optimistic TER ratio.
Article
Materials Science, Multidisciplinary
M. Tarnaoui, A. Zaim, M. Kerouad
Summary: This study provides an exhaustive analysis of the ferroelectric and thermal properties, as well as phase diagrams, of a nanoparticle with antiferroelectric core/ferroelectric shell. The results indicate that the core exchange interaction and transverse field have considerable implications on critical temperature and properties. The study suggests the important role played by the core exchange interaction in controlling the transition temperature and provides insights into its effect on critical properties.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Hui Gan, Shengchun Shen, Yaoxin Li, Yuewei Yin, Xiaoguang Li
Summary: We find that the electronic structures and transport properties of ferroelectric tunnel junctions (FTJs) are highly influenced by the types and locations of oxygen vacancies (OVs) in the ferroelectric barrier. The presence of OVs leads to the formation of local tail-to-tail domain walls, which alters the ferroelectricity of the barrier and the local density of states in the TiO2 layers. Consequently, the tunneling electroresistance (TER) effect is enhanced in the presence of OVs and is sensitive to their types and locations. These findings are crucial for the design of FTJs.
Article
Chemistry, Physical
Jin Yuan, Jian-Qing Dai, Miao-Wei Zhao
Summary: This study theoretically demonstrates that Pt/BiAlO3/Pt (Pt/BAO/Pt) structures can achieve a giant tunneling electroresistance (TER) effect, comparable to van der Waals tunnel junctions, by switching the electric polarization of the ferroelectric barrier. Furthermore, the use of a graphene monolayer can enhance the TER effect and improve the writing endurance of FTJ memories.
APPLIED SURFACE SCIENCE
(2023)
Article
Nanoscience & Nanotechnology
Liming Chen, Jian Zhou, Xiao Zhang, Kuankuan Ding, Jianxiang Ding, Zhengming Sun, Xuefeng Wang
Summary: This study investigates the influence of quantum interference effects on tunneling electroresistance in La0.7Sr0.3MnO3/BaTiO3/Nb:SrTiO3 FTJs at low temperatures. It is found that the ON/OFF current ratio can be significantly enhanced by manipulating the ferroelectric polarization effect.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Mechanics
Biao Wang
Summary: The failure of materials under loading is a well-known natural phenomenon, and reliable prediction is crucial for engineering materials. Classical strength theories are based on assumptions, while the rational energy strength theory provides more reasonable predictions without relying on assumptions.
JOURNAL OF APPLIED MECHANICS-TRANSACTIONS OF THE ASME
(2021)
Article
Physics, Multidisciplinary
Yangfan Hu, Xuejin Wan, Biao Wang
Summary: Mechanical forces and magnetic fields can alter the deformation and stability of magnetic emergent crystals (MECs) such as Bloch skyrmion crystals (SkX), N'eel SkX, and Anti-SkX. By constructing a thermodynamic model for noncentrosymmetric ferromagnets under coupled magnetoelastic fields, new terms in the free energy were found to influence MECs and cause instability as misfit strains increase.
NEW JOURNAL OF PHYSICS
(2021)
Article
Nanoscience & Nanotechnology
Lili Ding, Ye Ji, Xiaoyue Zhang, Mengjun Wu, Yue Zheng, Biao Wang, Weijin Chen
Summary: A new type of topological nanoisland domain texture has been discovered, with unique transport characteristics and rectifying behavior. These nanoislands exhibit exotic quad-domain textures, which show a higher conductance in the quad-domains compared to the cross-shaped buffer domains, indicating a correlation between local conductance and domain textures. This research sheds light on the potential applications of these domain textures in configurable electronic devices.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Materials Science, Multidisciplinary
Xianfeng Ma, Hailin Zhai, Fanqiang Meng, Jishen Jiang, Xiujie He, Yanying Hu, Wenjie Zhang, Jiajun Tu, Donghui Wei, Biao Wang
Summary: This study investigated the effects of different accident tolerant coatings (Cr coating and TiCrAlN coating) on the low-cycle fatigue life of Zr-4 alloy. It was found that the Cr coating significantly improved the fatigue life, while the TiCrAlN coating dramatically decreased the fatigue life. The variation in fatigue life was closely related to the ratcheting strain of each type of sample.
JOURNAL OF NUCLEAR MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Shasha Huang, Haohua Wen, Qing Guo, Biao Wang, Kan Lai
Summary: In this study, irradiation-induced vacancy evolution in face-centered cubic (FCC) Ni under mechanical strains was investigated using molecular dynamics simulations. It was found that the applied strain led to different stable forms of vacancy clusters, with the entropy contribution playing an important role in the thermodynamic stability of these clusters. The results provide insights into the dynamic evolution and thermodynamic stability of vacancy clusters in FCC Ni.
JOURNAL OF NUCLEAR MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Fangyan Liu, Mengye Wang, Xiaolong Liu, Biao Wang, Caifu Li, Chenning Liu, Zhang Lin, Feng Huang
Summary: A simple and robust strategy using light and solution treatment has been developed to create an organic membrane that effectively passivates CH3NH3PbI3, improving the stability and crystal quality of perovskites, significantly enhancing the photocatalytic hydrogen evolution rate.
Article
Materials Science, Coatings & Films
Jishen Jiang, Dekui Zhan, Junnan Lv, Xianfeng Ma, Xiujie He, Dongqing Wang, Yanying Hu, Hailin Zhai, Jiajun Tu, Wenjie Zhang, Biao Wang
Summary: A comparative study was conducted on the tensile behaviors of CrN coating and Cr coating at both room temperature and 400 degrees C, showing that Cr coating exhibited brittle-toductile transition at 400 degrees C and better crack resistance.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Zhao Liu, Biao Wang
Summary: This study investigates the mechanical behaviors of Nb3Al and Nb3Sn under different tensile loadings through first-principles calculations. It is found that the theoretical strength of Nb3Al is slightly higher than that of Nb3Sn, and the property difference is attributed to their different bonding states and strain sensitivities. The research reveals why the superconductivity of Nb3Sn is more sensitive to strain than Nb3Al at the microscopic level.
MATERIALS RESEARCH EXPRESS
(2021)
Article
Physics, Multidisciplinary
Xuejin Wan, Yangfan Hu, Zhipeng Hou, Biao Wang
Summary: Analyzing the effects of various anisotropies on the reorientation of skyrmion crystal, it was found that fourth order anisotropies have significant impacts that cannot be overlooked.
FRONTIERS IN PHYSICS
(2021)
Article
Nuclear Science & Technology
Ze Xu, Junlong Wei, Yulan Liu, Biao Wang
Summary: This paper investigates the fracture properties of Cr-coated Zircaloy cladding with initial oblique cracks, analyzing stress distribution, fracture mechanical behavior, and different types of cladding failure. The study provides a map of the relation between initial crack state and crack development trend, offering reference and guidance for coating monitoring in nuclear engineering.
ANNALS OF NUCLEAR ENERGY
(2021)
Article
Chemistry, Physical
Zhihua Liu, Yunzhong Zhu, Wenjia Wang, Siwei Long, Shaopeng Lin, Decai Ma, Biao Wang
Summary: Coating different thicknesses of Au nano-films on Tm3+/Yb3+/lithium niobate (LN) single crystal wafers can significantly enhance the luminescence intensity for blue and red emission. The enhancement is attributed to size-dependent localized surface plasmon resonance (LSPR) and manipulation of resonance intensity and enhancement factor by calculating the electron density of Au coating using an analytical optical absorption model.
APPLIED SURFACE SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Jishen Jiang, Xianfeng Ma, Biao Wang
Summary: The study found that the preoxidation temperature significantly affects the tensile properties of Cr-coated Zr-4 alloy. Preoxidation at lower temperatures can effectively reduce crack formation, while preoxidation at higher temperatures is more likely to result in the initiation of microcracks during tension, leading to premature failure.
Article
Materials Science, Multidisciplinary
Ze Xu, Yulan Liu, Biao Wang
Summary: An improved Weibull failure probability model taking into account initial cracks distributed in the cladding has been proposed in this paper. The study focuses on the failure probabilities of multi-layered SiC cladding under different conditions, showing that the cladding is more sensitive to changes in the inner pressure of fuel elements and can be optimized by adjusting the proportion of different layers. The effects of different Weibull parameters of CVD SiC on failure probability are small and negligible in real fuel elements.
JOURNAL OF NUCLEAR MATERIALS
(2021)
Article
Chemistry, Applied
Biao Wang, Qian Zhang, Jiaqing He, Feng Huang, Caifu Li, Mengye Wang
Summary: The study found that single crystal ZnO prepared by hydrothermal method can efficiently catalyze hydrogen generation from pure water, with a large surface area. Compared to Ga-doped ZnO powder, the hydrogen production rate of Ga-doped ZnO bulk crystal in pure water is higher.
JOURNAL OF ENERGY CHEMISTRY
(2022)
Article
Materials Science, Multidisciplinary
Zhao Liu, Biao Wang, Claudio Cazorla
Summary: CeO2 exhibits anisotropic mechanical and electronic properties under uniaxial tensile strain, with highest ideal strength and fracture strain along the [100] direction. Additionally, [100] tensile strain results in the largest band gap reduction compared to other strain directions. This study provides valuable insights into the behavior of CeO2 under stress, essential for its application in SOFCs.
