检索结果-内蒙古大学图书馆

First-principles study of the Pr-doped bilayer nickelate La3Ni2O7

Physical Review B 2025年第19期111卷 195118-195118页

作者： Zihao Huo Peng Zhang Haoliang Shi Xiaochun Yan Defang Duan Tian Cui Key Laboratory of Material Simulation Methods and Software of Ministry of Education State Key Laboratory of Superhard Materials College of Physics Jilin University Changchun 130012 China MOE Key Laboratory for Non-equilibrium Synthesis and Modulation of Condensed Matter Shaanxi Province Key Laboratory of Advanced Functional Materials and Mesoscopic Physics School of Physics Xi'an Jiaotong University Xi'an 710049 China Institute of High Pressure Physics School of Physical Science and Technology Ningbo University Ningbo 315211 China

Recently, the Pr-doped Ruddlesden-Popper (RP) phase of bilayer nickelate La3Ni2O7 has been reported to exhibit a superconducting transition temperature (Tc) of 82.5 K and a superconducting volume fraction of about 57% at high pressure. However, the effect of Pr doping on La3Ni2O7 remains unclear. Here, we studied the crystal structures and electronic properties of Pr-doped La3Ni2O7 at 0 and 15 GPa based on the first-principles calculations to explore the doping effect of Pr. Our findings indicate that the praseodymium atoms prefer to occupy the outer La-O layers site. We then investigated the evolution of crystal structures in both the ambient pressure phase and the high-pressure phase of La3Ni2O7 as a function of doping concentration, revealing inconsistent trends in their evolution with increasing doping levels. Finally, by fitting the bilayer two-orbital model, we propose that doping Pr may reduce the required pressure for the superconductivity of La3Ni2O7. These results not only can help the further experimental search of RP phase nickelate at lower pressure, but also provide a helpful guide for understanding the effect of chemical pressure in an isovalent-doped RP phase nickelate superconductor.

关键词： Crystal atomic structure

来源：评论

学校读者我要写书评

暂无评论

Crack-based and Hair-like Sensors Inspired from Arthropods:A Review

引用

Journal of Bionic Engineering 2020年第5期17卷 867-898页

作者： Changchao Zhang Junqiu Zhang Daobing Chen Xiancun Meng Linpeng Liu Kejun Wang Zhibin Jiao Tao Sun Dakai Wang Shichao Niu Zhiwu Han Luquan Ren Key Laboratory of Bionic Engineering(Ministry of Education China)Jilin UniversityChangchun 130022China State Key Laboratory of Automotive Simulation and Control Jilin UniversityChangchun 130022China State Key Laboratory of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China School of Mechanical and Electric Engineering Jiangsu Provincial Key Laboratory of Advanced RoboticsSoochow UniversitySuzhou 215123China

Over a long period of time,arthropods evolve to have two excellent mechanical sensilla of slit sensilla and trichobothria sensilla,which construct a perfect perception *** former mainly perceives the change of the in-the-plane force while the latter perceives that of the out-of-plane *** recent years,these two sensilla have attracted researchers as the models for developing artificial mechanical *** review mainly includes the biomechanics and biomimetic manufacturing techniques as well as their future application *** order to better understand the advantages of biological strategies,this review describes the morphology,mechanical analysis,and information recognition of slit sensilla and trichobothria *** this review highlights the recent development of Crack-based Sensors(CBSs)and Hair-like Sensors(HLSs)based on the analysis of biological *** manufacturing method and substrate of crack in CBS and those of hair rods in HLS are discussed ***,the practical applications and potential value of two sensilla,such as flexible wearable electronic devices,robot sensing system,autopilot sensing and wind tunnel speed detection,are briefly discussed.

关键词： crack-based sensors hair-like sensors slit sensilla trichobothria sensilla bioinspiration

来源：评论

学校读者我要写书评

暂无评论

A Successive "Conversion-Deposition" Mechanism Achieved by Micro-Crystalline Cu2O Modified Current Collector for Composite Lithium Anode

SSRN

引用

SSRN 2022年

作者： Cai, Yifei Qin, Bin Li, Chun Si, Xiaoqing Cao, Jian Zheng, Xiaohang Qiao, Liang Qi, Junlei State Key Laboratory of Advanced Welding and Joining Harbin Institute of Technology Harbin150001 China Key Laboratory of Materials Design and Quantum Simulation College of Science Changchun University Changchun130022 China

Lithium (Li) metal is a promising material for high-energy-density batteries, but it is still plagued by obvious capacity degradation and low average Coulombic efficiency resulting from dendrite Li propagation. One main reason is the electro-mechanic coupled failure of plated Li on the current collector, which contributes to non-dense Li deposition on the anode. Transition metal oxides (TMOs) with a conversion-type mechanism have been used directly as the anode materials for lithium ion batteries, which demonstrated better electro-mechanical stability than metal Li. Herein, a successive ''conversion-deposition'' mechanism is ingeniously developed to restrain the generation of dendritic Li. Specifically, a micro-crystalline Cu2O modified current collector was prepared, in which Li+ are sequentially inserted into Cu2O and deposited in the form of Li metal at successive low potential. A Li-Cu half-cell based on the hybrid mechanism sustains a high Coulombic efficiency of over 99.3% in up to 800 cycles. This work ingeniously inhibits the generation of dendrite Li by incorporating conversion-type materials with deposition-dissolution type metal Li, which contributes to a novel concept for the design of functional current collectors for composite Li anodes. © 2022, The Authors. All rights reserved.

关键词： Copper oxides

来源：评论

学校读者我要写书评

暂无评论

Effect of Overlap Pattern on the Residual Stress, Surface Morphology and Fatigue Properties of Ti-6al-4v Alloy by Multiple Laser Shock Peening

SSRN

引用

SSRN 2024年

作者： Luo, Xuekun Tian, Kai Xu, Ziheng Wang, Yiming Wang, Xin Wang, Kun Yu, Yang Guo, Lulu Ye, Chang Dang, Ning Aviation Key Laboratory of Advanced Corrosion and Protection on Aviation Materials Beijing Institute of Aeronautical Material Beijing100095 China School of Mechanical Science and Engineering Huazhong University of Science and Technology Hubei Wuhan430074 China Shenyang Engine Research Institute Shenyang110000 China State Key Laboratory for Performance and Structure Safety of Petroleum Tubular Goods and Equipment Materials CNPC Tubular Goods Research Institute Shaanxi Xi’an710077 China

In this study, the effects of the laser shock peening (LSP) pattern on the fatigue properties of Ti-6Al-4V alloy were investigated. The residual stress distribution and surface morphology generated by LSP were analyzed using both experiments and numerical simulations. The results show that by optimizing the LSP patterns and overlap ratios, deep compressive residual stresses and beneficial surface morphology can be obtained, resulting in a significant improvement of the fatigue performance. Specifically, LSP without optimization improves the fatigue life by a factor of 1.68 when the stress level is 550 MPa and the stress ratio is 0.1, while LSP with optimized parameters improves the fatigue life by a factor of 29.67. It has been demonstrated that the optimization of LSP patterns and overlap ratios plays an important role in enhancing the surface integrity and, thus, the fatigue performance of the Ti-6Al-4V alloy. © 2024, The Authors. All rights reserved.

关键词： Surface morphology

来源：评论

学校读者我要写书评

暂无评论

Introduction

Engineering Applications of Computational Methods

引用

Engineering Applications of Computational Methods 2023年 13卷 1-5页

作者： Wen, Chih-Yung Jiang, Yazhong Shi, Lisong Department of Aeronautical and Aviation Engineering Faculty of Engineering The Hong Kong Polytechnic University Hong Kong Hubei Key Laboratory of Theory and Application of Advanced Materials Mechanics School of Science Wuhan University of Technology Hubei Wuhan China

With the rapid development of electronic computers, numerical computation has become an important paradigm of scientific discovery as well as a powerful tool for engineering research. Solving complex problems in a computational fashion is more than applying theories, equations, and formulas. Computational methods, also called algorithms or schemes, have strong influences on the outcomes of computations. © 2023, The Author(s).

关键词：

来源：评论

学校读者我要写书评

暂无评论

Electronic Correlations and Hund’s Rule Coupling in Trilayer Nickelate La4Ni3O10

arXiv

引用

arXiv 2024年

作者： Huo, Zihao Zhang, Peng Zhang, Zihan Duan, Defang Cui, Tian Key Laboratory of Material Simulation Methods & Software of Ministry of Education State Key Laboratory of Superhard Materials College of Physics Jilin University Changchun130012 China MOE Key Laboratory for Non-equilibrium Synthesis and Modulation of Condensed Matter Shaanxi Province Key Laboratory of Advanced Functional Materials and Mesoscopic Physics School of Physics Xi’an Jiaotong University Xi’an710049 China Institute of High Pressure Physics School of Physical Science and Technology Ningbo University Ningbo315211 China

Trilayer Ruddlesden–Popper phase La4Ni3O10 has been observed with Tc of ~ 30 K at high pressure in recent experiment, which further expanded the family of nickelate superconductors. In this study, we explored the effects of electronic correlations in La4Ni3O10 using density function theory plus dynamical mean–field theory at ambient and high pressures. Our derived spectral functions and Fermi surface of ambient pressure phase are nicely consistent with the experimental results by angle–resolved photoemission spectroscopy, which emphasized the importance of electronic correlations in La4Ni3O10. We also found the electronic correlations in pressured La4Ni3O10 are both orbital–dependent and layer–dependent due to the presence of Hund’s rule coupling. There is a competition between the Hund’s rule coupling and the crystal–field splitting, and therefore the Ni–O layers with weaker crystal-field splitting energy would have stronger electronic correlations. Copyright © 2024, The Authors. All rights reserved.

关键词： Photoacoustic spectroscopy

来源：评论

学校读者我要写书评

暂无评论

Electrically Switchable Longitudinal Nonlinear Conductivity in Magnetic Semiconductors

引用

Physical Review Letters 2025年第4期134卷 046801-046801页

作者： Hong Jian Zhao Yuhao Fu Yurong Yang Yanchao Wang Laurent Bellaiche Yanming Ma Key Laboratory of Material Simulation Methods and Software of Ministry of Education College of Physics Jilin University Changchun 130012 China Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education) College of Physics Jilin University Changchun 130012 China International Center of Future Science Jilin University Changchun 130012 China National Laboratory of Solid State Microstructures and Jiangsu Key Laboratory of Artificial Functional Materials Department of Materials Science and Engineering Nanjing University Nanjing 210093 China State Key Laboratory of Superhard Materials College of Physics Jilin University Changchun 130012 China Smart Functional Materials Center Physics Department and Institute for Nanoscience and Engineering University of Arkansas Fayetteville Arkansas 72701 USA Department of Materials Science and Engineering Tel Aviv University Ramat Aviv Tel Aviv 6997801 Israel

Writing data by electric field (as opposed to electric current) offers promises for energy efficient memory devices. While this data writing scheme is enabled by the magnetoelectric effect, the narrow spectrum of room-temperature magnetoelectrics hinders the design of practical magnetoelectric memories, and the exploration of other mechanisms toward low-power memories is greatly demanding. Here, we propose a mechanism that allows the electric-field writing of data beyond the framework of magnetoelectric effect. By symmetry analysis, we show that electric field can induce longitudinal nonlinear conductivity (LNC) in a wide spectrum of magnetic materials, including ferromagnets, antiferromagnets, magnetoelectrics, and nonmagnetoelectrics. The LNC is electrically switchable by reversing the electric field, where the switched LNC is detectable by transport measurements. Our first-principles simulations combined with transport calculations further predict YFeO3 and CuFeS2 (room-temperature antiferromagnets) to showcase electrically switchable LNC. Our Letter helps enrich the research avenues in nonlinear charge transport, and offers a pathway for designing energy efficient devices based on LNC.

关键词： Magnetoelectric effects

来源：评论

学校读者我要写书评

暂无评论

Intrinsic and extrinsic anomalous transport properties of the Heusler ferromagnets Fe2CoAl and Fe2NiAl from first principles

引用

Physical Review B 2023年第22期107卷 224405-224405页

作者： Xiuxian Yang Wanxiang Feng Xiao-Ping Li Gui-Bin Liu Yuriy Mokrousov Yugui Yao Centre for Quantum Physics Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement (MOE) School of Physics Beijing Institute of Technology Beijing 100081 China Beijing Key Lab of Nanophotonics and Ultrafine Optoelectronic Systems School of Physics Beijing Institute of Technology Beijing 100081 China School of Physical Science and Technology Inner Mongolia University Hohhot 010021 China Institute of Physics Johannes Gutenberg University Mainz 55099 Mainz Germany Peter Grünberg Institut and Institute for Advanced Simulation Forschungszentrum Jülich and JARA 52425 Jülich Germany

Recently, Heusler ferromagnets have been found to exhibit unconventional anomalous electric, thermal, and thermoelectric transport properties. In this study, we employed first-principles density functional theory calculations to systematically investigate both intrinsic and extrinsic contributions to the anomalous Hall effect (AHE), anomalous Nernst effect (ANE), and anomalous thermal Hall effect (ATHE) in two Heusler ferromagnets: Fe2CoAl and Fe2NiAl. Our analysis reveals that the extrinsic mechanism originating from disorder dominates the AHE and ATHE in Fe2CoAl, primarily due to the steep band dispersions across the Fermi energy and corresponding high longitudinal electronic conductivity. Conversely, the intrinsic Berry phase mechanism, physically linked to nearly flat bands around the Fermi energy and gapped by spin-orbit interaction band crossings, governs the AHE and ATHE in Fe2NiAl. With respect to ANE, both intrinsic and extrinsic mechanisms are competing in Fe2CoAl as well as in Fe2NiAl. Furthermore, Fe2CoAl and Fe2NiAl exhibit tunable and remarkably pronounced anomalous transport properties. For instance, the anomalous Nernst and anomalous thermal Hall conductivities in Fe2NiAl attain giant values of 8.29 A/Km and 1.19 W/Km, respectively, at room temperature. To provide a useful comparison, we also thoroughly investigated the anomalous transport properties of Co2MnGa. Our findings suggest that Heusler ferromagnets Fe2CoAl and Fe2NiAl are promising candidates for spintronics and spin caloritronics applications.

关键词： Anomalous Hall effect Magnetism Transport phenomena Alloys

来源：评论

学校读者我要写书评

暂无评论

Influence of Assembly Parameters on Tensile Behavior of Hybrid CMC and Superalloy Bolted Joints by Progressive Damage Analysis

引用

Journal of Harbin Institute of technology(New Series) 2021年第3期28卷 53-60页

作者： Chao Lv Feng Li Shuyuan Zhao Qian Sun Mingrui Li Xinyang Sun China Academy of Aerospace Aerodynamics Beijing 100074China National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of TechnologyHarbin 150080China Shenyang Aircraft Design and Research Institute Aviation Industry Corporation of ChinaShenyang 110000China School of Aeronautics and Astronautics Harbin Institute of TechnologyHarbin 150001China

With the considerable applications of ceramic matrix composites(CMC) in aircraft engineering, the design of CMC bolted joint gains paramount attention because of its capacity to to improve load-bearing efficiency of aircraft key structure. In this work, a 3 D finite element model was established to predict tensile performance and failure modes of single-lap, single-bolt 2 D C/SiC composite, and superalloy joint, which considers the progressive damage behavior of 2 D woven C/SiC composites. On the basis of the developed progressive damage model, a parametric study was carried out to illustrate the effects of bolt preload and bolt-hole clearance on mechanical behaviors of the hybrid bolted joint. It was found that the increase in the value of bolt preload made the failure load grow first and then drop, and the optimum value of bolt preload 5.00 kN generated 56.47% rise in the initial failure load and 22.83% rise in the final failure load for the bolted joint in comparison with zero preload case. As the clearance increased from 0 to 2.00%, the initial and final failure loads respectively declined by 45.88% and 24.02% for 2.00% bolt-hole clearance relative to the neat-fit case. The loss in failure loads can be reduced to compressive stress concentration around the fastening hole-edge area, leading to the appearance of earlier damages by the introduction of increasing bolt hole clearance.

关键词： ceramic matrix composite progressive damage analysis tensile performance bolt preload bolt-hole clearance

来源：评论

学校读者我要写书评

暂无评论

Simultaneous Generation of Quantum Frequency Combs across Distinct Modal Families in a Single Silicon Nitride Whispering Gallery Mode Resonator

arXiv

引用

arXiv 2024年

作者： Ji, Bo Yang, Yongjun Wu, Tengfei Li, Nianqin He, Guangqiang State Key Laboratory of Advanced Optical Communication Systems and Networks Department of Electronic Engineering Shanghai Jiao Tong University Shanghai200240 China Science and Technology on Metrology and Calibration Laboratory Changcheng Institute of Metrology Measurement Aviation Industry Corporation of China Beijing100095 China State Key Laboratory of Precision Spectroscopy East China Normal University Shanghai200062 China

Quantum frequency combs (QFCs) are versatile resources for multi-mode entanglement, such as cluster states, crucial for quantum communication and computation. On-chip whispering gallery mode resonators (WGMRs) can generate these states at ultra-low threshold power. This work demonstrates the simultaneous generation of multiple QFCs using a single on-chip silicon nitride WGMR across distinct modal families. It presents a micro-ring resonator with a radius of 240 µm, capable of supporting four modal families within the 130 to 260 THz frequency range for consistency regulation. The results indicate that, by carefully designing the structure of silicon nitride WGMRs, it is possible to generate quantum entangled frequency combs across distinct modal families simultaneously using monochromatic pump light. It is achieved by modulating the pump mode profiles with a spatial light modulator (SLM) or an on-chip inverse-designed mode converter. This approach offers a simple and low-cost method to achieve higher-density entanglement integration on-chip. Copyright © 2024, The Authors. All rights reserved.

关键词： Silicon nitride

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：