检索结果-内蒙古大学图书馆

arXiv 2024年

作者： Acharya, Gokul Neupane, Bimal Hsu, Chia-Hsiu Yang, Xian P. Graf, David Choi, Eun Sang Pandey, Krishna Un Nabi, Md Rafique Chhetri, Santosh Karki Basnet, Rabindra Rahman, Sumaya Wang, Jian Hu, Zhengxin Da, Bo H., Churchill G., Chang M.Z., Hasan Y., Wang J., Hu Department of Physics University of Arkansas FayettevilleAR United States Department of Physics University of North Texas DentonTX United States Division of Physics and Applied Physics School of Physical and Mathematical Sciences Nanyang Technological University Singapore Singapore Okinawa904-0495 Japan Department of Physics Princeton University PrincetonNJ United States National High Magnetic Field Lab TallahasseeFL United States Materials Science and Engineering Program Institute for Nanoscience and Engineering University of Arkansas FayettevilleAR United States MonArk NSF Quantum Foundry University of Arkansas FayettevilleAR United States Department of Chemistry & Physics University of Arkansas at Pine Bluff Pine BluffAR71603 United States Department of Chemistry and Biochemistry Wichita State University WichitaKS United States Ibaraki Tsukuba Japan Department of Chemistry University of Cambridge Cambridge United Kingdom Princeton Institute for Science and Technology of Materials Princeton University PrincetonNJ United States Lawrence Berkeley National Laboratory BerkeleyCA United States

Magnetotransport, the response of electrical conduction to external magnetic field, acts as an important tool to reveal fundamental concepts behind exotic phenomena and plays a key role in enabling spintronic applications. Magnetotransport is generally sensitive to magnetic field orientations. In contrast, efficient and isotropic modulation of electronic transport, which is useful in technology applications such as omnidirectional sensing, is rarely seen, especially for pristine crystals. Here we propose a strategy to realize extremely strong modulation of electron conduction by magnetic field which is independent of field direction. GdPS, a layered antiferromagnetic semiconductor with resistivity anisotropies, supports a field-driven insulator-to-metal transition with a paradoxically isotropic gigantic negative magnetoresistance insensitive to magnetic field orientations. This isotropic magnetoresistance originates from the combined effects of a near-zero spin-orbit coupling of Gd3+-based half-filling f-electron system and the strong on-site f-d exchange coupling in Gd atoms. Our results not only provide a novel material system with extraordinary magnetotransport that offers a missing block for antiferromagnet-based ultrafast and efficient spintronic devices, but also demonstrate the key ingredients for designing magnetic materials with desired transport properties for advanced functionalities. © 2024, CC BY-NC-SA.

关键词： Magnetoresistance

来源：评论

学校读者我要写书评

暂无评论

Correction: Polyaniline nanorods dotted on graphene oxide nanosheets as a novel super adsorbent for Cr(VI)

引用

Dalton transactions (Cambridge, England : 2003) 2022年第1期52卷 2022 Dec 8页

作者： Shouwei Zhang Meiyi Zeng Wenqing Xu Jiaxing Li Jie Li Jinzhang Xu Xiangke Wang Key Laboratory of Novel Thin Film Solar Cells Institute of Plasma Physics Chinese Academy of Sciences 230031 Hefei PR China. lijx@***. School of Materials Science and Engineering Hefei University of Technology Hefei 230031 China. Department of Chemical Engineering Environmental Engineering Program Yale University New Haven Connecticut 06520 USA.

Correction for 'Polyaniline nanorods dotted on graphene oxide nanosheets as a novel super adsorbent for Cr(VI)' by Shouwei Zhang , , 2013, , 7854-7858, https://***/10.1039/C3DT50149C.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Carbon Monoxide Promotes the Catalytic Hydrogenation on Metal Cluster Catalysts

引用

Research 2020年第1期2020卷 702-710页

作者： Ruixuan Qin Pei Wang Pengxin Liu Shiguang Mo Yue Gong Liting Ren Chaofa Xu Kunlong Liu Lin Gu Gang Fu Nanfeng Zheng State Key Laboratory for Physical Chemistry of Solid Surfaces Collaborative Innovation Center of Chemistry for Energy Materialsand National&Local Joint Engineering Research Center for Preparation Technology of NanomaterialsCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China College of Science Huazhong Agricultural UniversityWuhan 430070China Institute of Physics Chinese Academy of SciencesBeijing 100190China

Size effect plays a crucial role in catalytic *** highly dispersed ultrasmall clusters with a limited number of metal atoms are one candidate of the next generation catalysts that bridge the single-atom metal catalysts and metal ***,for the unfavorable electronic property and their interaction with the substrates,they usually exhibit sluggish *** advantage of the small size,their catalytic property would be mediated by surface binding *** combination of metal cluster coordination chemistry brings new *** poisoning is notorious for Pt group metal catalysts as the strong adsorption of CO would block the active *** this work,we will demonstrate that CO could serve as a promoter for the catalytic hydrogenation when ultrasmall Pd clusters are *** means of DFT calculations,we show that Pd_(n)(n=2-147)clusters display sluggish activity for hydrogenation due to the too strong binding of hydrogen atom and reaction intermediates thereon,whereas introducing CO would reduce the binding energies of vicinal sites,thus enhancing the hydrogenation ***,supported Pd_(2)CO catalysts are fabricated by depositing preestablished[Pd_(2)(μ-CO)_(2)Cl_(4)]2-clusters on oxides and demonstrated as an outstanding catalyst for the hydrogenation of *** promoting effect of CO is further verified experimentally by removing and reintroducing a proper amount of CO on the Pd cluster catalysts.

关键词： reaction. hydrogenation introducing

来源：评论

学校读者我要写书评

暂无评论

Liquid-like thermal conductivity in solid materials: Dynamic behavior of silver ions in argyrodites

引用

Nano Energy 2024年 122卷

作者： Wei, Pai-Chun Hsing, Cheng-Rong Yang, Chun-Chuen Tung, Yung-Hsiang Wu, Hsin-Jay Yen, Wan-Ting Lai, Yen-Chung Lee, Jey-Jau Wang, Chin-Wei Wu, Hung-Cheng Yang, Hung-Duen Singaravelu, Venkatesh Miao, Xiaohe Giugni, Andrea Hu, Jia-Kai Fu, Jui-Han Tung, Vincent He, Jian Wei, Ching-Ming He, Jr-Hau Department of Materials Science and Engineering National Cheng Kung University Tainan70101 Taiwan Division of Natural Science Center for General Education Chang Gung University Taoyuan City33302 Taiwan Department of Physics National Central University Taoyuan City320317 Taiwan Department of Materials Science and Engineering National Yang Ming Chiao Tung University Hsinchu30010 Taiwan National Synchrotron Radiation Research Center Hsin-Chu30076 Taiwan Department of Physics and Center of Crystal Research National Sun Yat-Sen University Kaohsiung80424 Taiwan Core Laboratories King Abdullah University of Science and Technology Thuwal23955-6900 Saudi Arabia Instrumentation and Service Center for Physical Sciences Westlake University China Department of Physics University of Milano Milano20133 Italy Department of Chemical System Engineering School of Engineering The University of Tokyo Tokyo113-8656 Japan Department of Physics and Astronomy Clemson University Clemson29634-0978 United States Institute of Atomic and Molecular Sciences Academia Sinica Taipei10617 Taiwan Department of Materials Science and Engineering City University of Hong Kong Kowloon Hong Kong

Argyrodite-type compounds are renowned for their exceptional thermoelectric performance and ultralow thermal conductivity. While the latter is commonly attributed to the superionic behavior of cations, there has been limited research into how cations' static or dynamic behavior affects the thermal transport properties of argyrodites. To address and bridge this research gap, we employ a wide range of measurements and develop ab-initio based machine-learning interatomic potentials to perform large-scale molecular dynamics simulations on Ag8SiTe6 under different temperatures. We highlight the symmetry breaking and lattice-distortion scattering caused by chilled ions at low temperatures and the enhanced ionic diffusion behavior at elevated temperatures endowing argyrodites with superior superionicity and liquid-like thermal conductivity. Our findings also provide valuable insights into the ionic diffusion kinetics and the exotic lattice dynamics of liquid-like thermoelectrics. © 2024

关键词： Molecular dynamics

来源：评论

学校读者我要写书评

暂无评论

Study of Ultrafast Photocarrier Dynamics in Polycrystalline Cdte Films Under Low Illumination

SSRN

引用

SSRN 2022年

作者： Hu, Gang Li, Bo-Han Li, Huang Cao, Hongyuan Ren, Zefeng Zhao, Dewei Li, Wei Zhang, Jingquan Institute of Solar Energy Materials and Devices College of Materials Science and Engineering Sichuan University No. 24 South Section 1 Yihuan Road Chengdu610065 China Engineering Research Center of Alternative Energy Materials & Devices Ministry of Education China State Key Laboratory of Molecular Reaction Dynamics and Dynamics Research Center for Energy and Environmental Materials Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian116023 China Hefei National Laboratory for Physical Sciences at the Microscale Department of Chemical Physics University of Science and Technology of China Hefei230026 China

The photocarrier dynamics in polycrystalline CdTe films is closely related to device performance. However, the test results obtained at different illumination intensity may be different, and even significantly deviate from the ones in practical application environments. Here, the photocarrier dynamics in polycrystalline CdTe films deposited by thermal evaporation was studied through time-resolved transient absorption (TA) under different pump intensity. It was found that the behaviors of photocarriers in CdTe films is strongly dependent on the pump intensity. Under low pump intensity that close to operating environments, the lifetime of free carriers becomes extremely short compared to high intensity, which is interpreted as a rapid trapping of free carriers by defects. For low pump intensity, numerical fitting by a physical model with one defect level shows that the free carriers in band-edge can be rapidly trapped by defects within tens of picoseconds and then slowly recover to the ground state within several nanoseconds. Our results renewed the knowledge of photocarrier dynamics in polycrystalline CdTe films and develops a new characterization method for the preparation of high-quality films. © 2022, The Authors. All rights reserved.

关键词： Cadmium telluride

来源：评论

学校读者我要写书评

暂无评论

Mechanochemical carbon dioxide capture and conversion

引用

Nature nanotechnology 2025年 2025 Jun 5页

作者： Runnan Guan Li Sheng Changqing Li Jiwon Gu Jeong-Min Seo Boo-Jae Jang Seung-Hyeon Kim Jiwon Kim Hankwon Lim Qunxiang Li Jong-Beom Baek Department of Energy and Chemical Engineering Center for Dimension-Controllable Organic Frameworks Ulsan National Institute of Science and Technology Ulsan South Korea. Hefei National Research Center for Physical Sciences at the Microscale Department of Chemical Physics University of Science and Technology of China Hefei China. Department of Energy and Chemical Engineering Carbon Neutrality Demonstration and Research Center Graduate School of Carbon Neutrality Ulsan National Institute of Science and Technology Ulsan South Korea. Department of Energy and Chemical Engineering Carbon Neutrality Demonstration and Research Center Graduate School of Carbon Neutrality Ulsan National Institute of Science and Technology Ulsan South Korea. hklim@unist.ac.kr. Hefei National Research Center for Physical Sciences at the Microscale Department of Chemical Physics University of Science and Technology of China Hefei China. liqun@***. Department of Energy and Chemical Engineering Center for Dimension-Controllable Organic Frameworks Ulsan National Institute of Science and Technology Ulsan South Korea. jbbaek@unist.ac.kr.

Developing a direct carbon dioxide (CO) capture and methanation method is one of the most important challenges to achieving carbon neutrality. However, converting CO into methane (CH) kinetically requires the activation of stable CO at high temperatures (300-500 °C), while the CO-to-CH conversion thermodynamically favours low temperatures. Here we report an efficient mechanochemical CO capture and conversion under mild conditions (65 °C). Using commercial zirconium oxide (ZrO) and nickel catalysts, the mechanochemical CO capture capacity was 75-fold higher than the conventional thermochemical process. The mechanochemical CO conversion reached a nearly quantitative CO conversion (99.2%) with CH selectivity (98.8%). We determined that repeatedly induced abundant oxygen vacancies on ZrO by dynamic mechanical actions are responsible for efficient CO capture and, thus, subsequently spontaneous methanation.

关键词：

来源：评论

学校读者我要写书评

暂无评论

DeePMD-kit v3: A Multiple-Backend Framework for Machine Learning Potentials

arXiv

引用

arXiv 2025年

作者： Zeng, Jinzhe Zhang, Duo Peng, Anyang Zhang, Xiangyu He, Sensen Wang, Yan Liu, Xinzijian Bi, Hangrui Li, Yifan Cai, Chun Zhang, Chengqian Du, Yiming Zhu, Jia-Xin Mo, Pinghui Huang, Zhengtao Zeng, Qiyu Shi, Shaochen Qin, Xuejian Yu, Zhaoxi Luo, Chenxing Ding, Ye Liu, Yun-Pei Shi, Ruosong Wang, Zhenyu Bore, Sigbjørn Løland Chang, Junhan Deng, Zhe Ding, Zhaohan Han, Siyuan Jiang, Wanrun Ke, Guolin Liu, Zhaoqing Lu, Denghui Muraoka, Koki Oliaei, Hananeh Singh, Anurag Kumar Que, Haohui Xu, Weihong Xu, Zhangmancang Zhuang, Yong-Bin Dai, Jiayu Giese, Timothy J. Jia, Weile Xu, Ben York, Darrin M. Zhang, Linfeng Wang, Han School of Artificial Intelligence and Data Science Unversity of Science and Technology of China Hefei China AI for Science Institute Beijing100080 China DP Technology Beijing100080 China Academy for Advanced Interdisciplinary Studies Peking University Beijing100871 China State Key Lab of Processors Institute of Computing Technology Chinese Academy of Sciences Beijing100871 China University of Chinese Academy of Sciences Beijing China Baidu Inc. Beijing China Department of Computer Science University of Toronto TorontoON Canada Department of Chemistry Princeton University PrincetonNJ08540 United States University of Chinese Academy of Sciences Beijing100871 China State Key Laboratory of Physical Chemistry of Solid Surfaces iChEM College of Chemistry and Chemical Engineering Xiamen University Xiamen361005 China College of Integrated Circuits Hunan University Changsha410082 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Center for Smart Materials and Device Integration School of Material Science and Engineering Wuhan University of Technology Wuhan430070 China College of Science National University of Defense Technology Changsha410073 China Hunan Key Laboratory of Extreme Matter and Applications National University of Defense Technology Changsha410073 China ByteDance Research Beijing100098 China Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo315201 China College of Materials Science and Opto-Electronic Technology University of Chinese Academy of Sciences Beijing100049 China Key Laboratory of Theoretical and Computational Photochemistry of Ministry of Education College of Chemistry Beijing Normal University Beijing100875 China Department of Geosciences Princeton University PrincetonNJ08544 United States Department of Applied Physics and Applied Mathematics Columbia University New YorkNY10027 United States IKKEM Fujian Xiamen361005 China Graduate

In recent years, machine learning potentials (MLPs) have become indispensable tools in physics, chemistry, and materials science, driving the development of software packages for molecular dynamics (MD) simulations and related applications. These packages, typically built on specific machine learning frameworks such as TensorFlow, PyTorch, or JAX, face integration challenges when advanced applications demand communication across different frameworks. The previous TensorFlow-based implementation of DeePMD-kit exemplified these limitations. In this work, we introduce DeePMD-kit version 3, a significant update featuring a multi-backend framework that supports TensorFlow, PyTorch, JAX, and PaddlePaddle backends, and demonstrate the versatility of this architecture through the integration of other MLPs packages and of Differentiable Molecular Force Field. This architecture allows seamless backend switching with minimal modifications, enabling users and developers to integrate DeePMD-kit with other packages using different machine learning frameworks. This innovation facilitates the development of more complex and interoperable workflows, paving the way for broader applications of MLPs in scientific research. Copyright © 2025, The Authors. All rights reserved.

关键词： Molecular dynamics

来源：评论

学校读者我要写书评

暂无评论

Brownian motion of snowman-shaped colloidal particles

引用

The Journal of chemical physics 2025年第21期162卷 214903页

作者： Man Liu Wendi Yi Huaguang Wang Zexin Zhang College of Chemistry Chemical Engineering and Materials Science Soochow University Suzhou 215123 China. Institute for Advanced Study Center for Soft Condensed Matter Physics and Interdisciplinary Research School of Physical Science and Technology Soochow University Suzhou 215006 China.

We investigate the Brownian motion of isolated snowman-shaped particles consisting of pairs of large and small spheres by video microscopy. Our observations reveal that the particle exhibits varying degrees of anisotropic translational diffusion depending on the reference point used for tracking. In particular, when tracking the snowman's geometrical center, the diffusion coefficient along the particle's long axis (Da) is greater than that along the short axis (Db). When tracking the large sphere's center, Da and Db are identical, while tracking the small sphere's center results in Da being smaller than Db. Since Da remains constant across these geometrical centers, the higher Db thus leads to the fastest diffusion for the small sphere's center. These differences in diffusion arise from the varying coupling between translational and rotational motions, determined by the tracking points relative to the center of hydrodynamic stress (CoH). The CoH has been experimentally confirmed to be the geometrical center of the snowman-shaped particle. Our findings are consistent with the Langevin theory for the Brownian motion of anisotropic particles.

关键词： Geometry

来源：评论

学校读者我要写书评

暂无评论

Strain Dependent Spin Hall Magnetoresistance in the Multiferroic Antiferromagnet BiFeO3

arXiv

引用

arXiv 2023年

作者： Sando, D. Chen, S. Paull, O. Xu, B. van Rijn, J.J.L. Xu, C. Xu, S. Appert, F. Juraszek, J. Bellaiche, L. Nagarajan, V. Banerjee, T. School of Materials Science and Engineering UNSW Sydney Kensington2052 Australia School of Physical and Chemical Sciences University of Canterbury Christchurch8041 New Zealand Australian Research Council Centre of Excellence in Future Low Energy Electronics Australia University of Groningen Zernike Institute for Advanced Materials Groningen9747 AG Netherlands Jiangsu Key Laboratory of Thin Films School of Physical Science and Technology Soochow University Suzhou215006 China Department of Physics Institute for Nanoscience and Engineering University of Arkansas FayettevilleAR United States Univ Rouen Normandie INSA Rouen Normandie CNRS Normandie Univ GPM UMR 6634 RouenF-76000 France

The spin Hall magnetoresistance (SMR) of epitaxial BiFeO3 thin films is investigated. SMR consistent with ferromagnetic interfacial states for BiFeO3 films fabricated on (001) SrTiO3 (R' BFO) and LaAlO3 (T' BFO) substrates is found, albeit with different temperature dependencies. For T' BFO, the SMR is enhanced at room temperature, and decays with reduced temperatures. By contrast, R' BFO shows a monotonic decrease in SMR response with increasing temperature, mirroring the trend of a weak ferromagnet. Density functional theory shows that this difference originates from the coupling of the applied magnetic field to oxygen octahedral rotation (R') and spin (T') degrees of freedom. © 2023, CC BY.

关键词： Bismuth compounds

来源：评论

学校读者我要写书评

暂无评论

STEM-EELS: A Proper Tool for Observation of Strong Coupling Effects between Surface Excitations with High Spatial and Energy Resolution

引用

Microscopy and Microanalysis 2024年第SUPPLEMENT_1期30卷

作者： Gallina, Pavel Kvapil, Michal Konečná, Andrea Horák, Michal Bitton, Ora Houben, Lothar Křápek, Vlastimil Haran, Gilad Idrobo, Juan Carlos Šikola, Tomáš Brno University of Technology CEITEC Brno Czech Republic Brno University of Technology FME Institute of Physical Engineering Brno Czech Republic Weizmann Institute of Science Chemical Research Support Department Rehovot Israel Weizmann Institute of Science Department of Chemical and Biological Physics Rehovot Israel Center for Nanophase Materials Sciences Oak Ridge National Laboratory Oak Ridge Tennessee USA

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：