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Charge transport across LaMnO3 / Nd0.7Sr0.3MnO3 manganite interfaces: Role of swift heavy ion irradiation

Ceramics International 2025年第17期51卷 23865-23880页

作者： Goswami, Hardika Rajyaguru, Bhargav Gadani, Keval Chondagar, N.A. Donga, Amiras Raval, Nisarg Negi, Puneet Ganesan, V. Kandasami, Asokan Shah, N.A. Solanki, P.S. Department of Physics Saurashtra University Rajkot360005 India Division of Solid State Physics Department of Materials Science and Engineering Uppsala University SE–751 03 Sweden Department of Physics Center of Education Indian Institute of Teacher Education Gandhinagar382016 India Department of Physics Akal College of Basic Sciences Eternal University Baru Sahib Himachal Pradesh 173101 India UGC–DAE Consortium for Scientific Research Mumbai Center BARC Campus Mumbai400085 India Medi–Caps University A.B. Road Pigdamber Rau Indore453331 India Inter University Accelerator Center Aruna Asaf Ali Marg New Delhi110067 India Department of Physics & Center for Interdisciplinary Research University of Petroleum and Energy Studies Dehradun248007 India

Interface in thin film is the most sensitive tool to alter the transport, magnetic and other physical properties of functional materials. In the present communication, LaMnO3/Nd0.7Sr0.3MnO3/SrTiO3 (LMO/NSMO/STO) manganite structures were prepared by sol–gel–assisted chemical solution deposition (CSD) followed by irradiation using 100 MeV O7+ high energetic ions. Irradiation induced modifications in the structural and microstructural aspects of LMO/NSMO/STO structures have been explored to understand the LMO/NSMO interface resistivity recorded under the influence of 5 μA applied interface current. Modifications in the LMO/NSMO interface resistivity through different thermal cycles, namely, zero field cooled cooling (ZFC), field cooled cooling (FCC) and field cooled warming (FCW) (ZFC–FCC–FCW protocol) have been understood based on the trapping or freezing and release of trapped electronic phase fractions. While metallic nature of the interface has been explored based on Zener double exchange (ZDE) polynomial law for charge conduction, the semiconducting nature of interface resistivity on small polaron conduction mechanism where variation in activation energy (Ea) with thermal cycle and ion fluence. Ion fluence and interface current influenced MR has been explored across the LMO/NSMO interface. © 2025 Elsevier Ltd and Techna Group S.r.l.

关键词： Activation energy

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Ultra-low hysteresis, high-toughness, anti-swelling nanocomposite hydrogel derived from dynamic multiple noncovalent interactions for wearable strain sensing and underwater gait recognition

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Chemical engineering Journal 2025年 516卷

作者： Tang, Jie Chen, Yongmei Li, Kexin Bai, Yuyu Guo, Ruiqi Fukuda, Kenjiro Someya, Takao Ito, Yoshihiro Kawamoto, Masuki College of Bioresources Chemical and Materials Engineering National Demonstration Center for Experimental Light Chemistry Engineering Education Shaanxi University of Science & Technology Xi'an710021 China RIKEN Center for Emergent Matter Science 2-1 Hirosawa Saitama Wako351-0198 Japan Solid State Chemistry Laboratory RIKEN Pioneering Research Institute 2-1 Hirosawa Saitama Wako351-0198 Japan

Hydrogel-based wearable strain sensors offer a promising solution to challenge such as mechanical mismatch and the influence of environmental media on underwater gait training. However, the underwater instability of hydrogel and its inability to surmount trade-offs between low hysteresis and high toughness restrict sensor's real-time response and reliability for gait monitoring and recognition. Tough hydrogels dissipate energy through numerous bond breakages during deformation, but the slow recovery of these broken bonds leads to hysteresis. A multiple noncovalent crosslinking strategy is proposed to simultaneously overcome the trade-offs and prevent swelling by tailoring the dynamic balance of multiple noncovalent interactions in hydrogels. Nanocomposite-Noncovalent-Water hydrogels exhibit low hysteresis-yet-high toughness (a recovery rate of 91.1 % after 30 s and 2.5 MPa strength), anti-swelling (3.45 %, 60 days), excellent underwater strain sensing performance (gauge factor: 4.26 and 3500 cycles). These hydrogels enable the integration of the monitoring system with machine learning-based gait recognition algorithms for abnormal detection. Our approach reconciles the trade-off, resulting in low hysteresis and reliable data for machine learning-based recognition. These findings provide advanced design concepts for materials to mediate conflicting functions and advance rehabilitation equipment that integrates intelligence. © 2025

关键词： Human rehabilitation equipment

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Effect of thermal longitudinal spin fluctuations on the elastic properties of Ni3Nb

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Physical Review B 2024年第21期110卷 214109-214109页

作者： Ziyi Xiong Wei Li Zhihua Dong Weiwei Xu Levente Vitos Applied Materials Physics Department of Materials Science and Engineering Royal Institute of Technology SE-10044 Stockholm Sweden College of Materials Science and Engineering Chongqing University Chongqing 400030 People's Republic of China College of Aerospace Engineering Xiamen University Xiamen 361005 People's Republic of China Department of Physics and Astronomy Division of Materials Theory Uppsala University Box 516 SE-75120 Uppsala Sweden Research Institute for Solid State Physics and Optics Wigner Research Center for Physics P.O. Box 49 H-1525 Budapest Hungary

Using an efficient first-principles computational approach, we investigate the influence of the thermal longitudinal spin fluctuations (LSFs) within the nickel sublattices on the thermoelastic properties of Ni3Nb with D022 structure. Leveraging the mean magnetic moment values to represent the spin-fluctuation state at respective temperatures and incorporating the lattice vibration contributions via the Debye model, the equilibrium bulk parameters and elastic constants are derived. We find that, although the volume expansion remains the primary mechanism behind the softening of the elastic constants with increasing temperature, the LSFs effect contributes significantly to the temperature dependence of c11 and c33. Our analysis reveals that including the LSFs makes the theoretical thermal-expansion coefficient highly anisotropic, in line with the experiments. Quantitative agreement between theory and experiment is obtained for the thermal expansion along the c axis at temperatures up to 500 K, whereas the measured thermal expansion along the a axis is underestimated by theory. The present results provide theoretical thermoelastic data for free-standing Ni3Nb precipitates with D022 structure, which can be used to estimate the lattice strains around such precipitates in Ni-based superalloys.

关键词： Temperature distribution

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Amino-functionalized porous PDVB with high adsorption and regeneration performance for fluoride removal from water

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Green Chemical engineering 2021年第2期2卷 224-232页

作者： Yuanyuan Huang Xianbiao Wang Yongfei Xu Shaojie Feng Jin Liu Huanting Wang Anhui Province International Research Center on Advanced Building Materials School of Materials Science and Chemical EngineeringAnhui Jianzhu UniversityHefei230601China Institute of Solid State Physics Chinese Academy of SciencesHefei230031China Anhui Institute of Building Science Research and Design Hefei230001China Department of Chemical Engineering Monash UniversityClaytonVictoria3800Australia

Excessive fluoride anions in drinking water are toxic to the health of human *** this article,an effective fluoride removal adsorbent on the basis of amino-functionalized porous polydivinylbenzene(PDVB)was prepared through low cost processes,which included solvothermal preparation of porous PDVB and subsequent surface *** obtained amino-functionalized porous PDVB(A-PDVB)has high surface area of 443 m2 g1 and high adsorption capacity towards fluoride anion up to 105.9 mg *** adsorbents surface area,the adsorption capacity per unit surface area of A-PDVB is 0.24 mg m2 which is more than 4 times of porous PDVB(0.058 mg m2).The enhanced adsorption performance of A-PDVB was due to amino groups electrostatic interaction coupled with hydrogen bond binding with fluoride *** addition,the aminofunctionalized porous PDVB could be regenerated in high efficiency under alkaline *** work not only exhibits the possibility of A-PDVB for application as an environment-friendly adsorbent for fluoride removal but also gives an insight into understanding mechanism of the fluoride anions adsorption onto aminofunctionalized porous PDVB.

关键词： Amino-functionalization Porous polydivinylbenzene(PDVB) Adsorption Regeneration Fluoride anion

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Topological magnetic corner states in two-dimensional ferrimagnetic metal-organic frameworks

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Physical Review B 2025年第7期111卷 075433-075433页

作者： Qing-Bo Liu Xiangyang Li Ziyang Yu Lun Xiong Hua-Hua Fu Hubei Key Laboratory of Optical Information and Pattern Recognition School of Optical Information and Energy Engineering School of Mathematics and Physics Wuhan Institute of Technology Wuhan 430073 China Key Laboratory of Materials Physics Institute of Solid State Physics Hefei Institutes of Physical Science (HFIPS) Chinese Academy of Sciences Hefei 230031 China School of Physics and Wuhan National High Magnetic Field Center Huazhong University of Science and Technology Wuhan 430074 China Institute for Quantum Science and Engineering Huazhong University of Science and Technology Wuhan Hubei 430074 China

Topological corner states have been extensively studied in two-dimensional (2D) topological insulators (TIs), yet they remain rarely reported in 2D magnetic metal-organic frameworks (MOFs). In this work, we uncover the nontrivial corner states protected by C2z and C4z symmetry in three 2D ferrimagnetic MOFs. In the ferrimagnetic Cr(ODZ)2 (DZ = 1.2.5-diazole) with a magnetic space group (MSG) 14.2.87, the occupied electronic bands contain the essential band representations (BRs) of Au@2b and Ag@2c with unconventional features, facilitating the formation of quantized fractional charge (e2) in both spin-up and spin-down channels under C2z symmetry protection. Even in the presence of spin-orbit coupling (SOC), these nontrivial corner states are well preserved. Additionally, the C4z symmetry protected corner states are also identified in two other types of ferrimagnetic MOFs, specifically, Cr(SDZ)2 and Cr(SeDZ)2 monolayers in MSG 100.5.840 in the presence of SOC, contributed by the following basic BRs: Au@2b+Ag@2d. In the former, the magnetic corner states only exist in the spin-up channel, whereas in the latter, they are present in both spin-up and spin-down channels. Our research findings offer an ideal material platform for exploring the application of magnetic corner states in a special topological device.

关键词： Ferrimagnetism

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Crystal electric field excitation and vibrational properties of the quantum spin liquid candidate LiYbSe2

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Physical Review B 2024年第17期109卷 174101-174101页

作者： Enlai Wang Min Zhang Chao An Ying Zhou Yonghui Zhou Jian Zhou Zhaorong Yang Institutes of Physical Science and Information Technology Anhui University Hefei 230601 China Anhui Key Laboratory of Low-Energy Quantum Materials and Devices High Magnetic Field Laboratory HFIPS Chinese Academy of Sciences Hefei 230031 China National Laboratory of Solid State Microstructures & Department of Materials Science and Engineering Nanjing University Nanjing 210093 China Collaborative Innovation Center of Advanced Microstructures Nanjing 210093 China

LiYbSe2 was recently discovered and assumed to be a new member of the quantum spin liquid candidates. In the paper, polarization-resolved Raman scattering and temperature-dependent Raman scattering experiments were utilized to study the elementary excitations in LiYbSe2. Four phonon modes with Eg, T2g1, T2g2, and A1g symmetry, respectively, and three crystal electric field (CEF) excitations, including CEF1, CEF2, and CEF3 at 116.2, 200.9, and 232.1cm−1, respectively, were conclusively identified. With 633 and 532 nm excitation, resonant conditions were satisfied and caused the breakdown of selection rules for T2g and also prompted the observation of higher-order modes. Helicity-resolved CEF modes were studied based on circularly polarized light and the conservation law of angular momentum. Moreover, CEF modes showed abnormal redshift with decreasing temperature which can be attributed to the reduction of electronegativity of Se atoms due to the lattice contraction. Contributing to the close energy between Eg and CEF1, weak CEF-phonon coupling was induced in this system and caused abnormal softening of Eg at low temperature. The CEF excitations and vibration properties studied here provide information about the electronic elementary excitations, which help to further study or control the frustrated magnetism and novel quantum spin liquid state in LiYbSe2.

关键词： Electron-phonon coupling Frustrated magnetism Quantum spin liquid Raman spectroscopy

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Oxidization engineered Dzyaloshinskii-Moriya interaction and topological magnetism at Fe/MgO bilayers

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Physical Review B 2023年第21期108卷 214404-214404页

作者： Liming Wang Yonglong Ga Qirui Cui Peng Li Jinghua Liang Yan Zhou Shouguo Wang Hongxin Yang Anhui Key Laboratory of Magnetic Functional Materials and Devices School of Materials Science and Engineering Anhui University Hefei 230601 China National Laboratory of Solid State Microstructures School of Physics Collaborative Innovation Center of Advanced Microstructures Nanjing University Nanjing 210093 China Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo 315201 China School of Science and Engineering The Chinese University of Hong Kong Shenzhen 518172 China

Fe/MgO system is the one of the most important material prototypes in modern magnetic devices owing to its rich physics such as large perpendicular magnetic anisotropy and magnetoresistance effect. However, both large Dzyaloshinskii-Moriya interaction (DMI) and the topological magnetism that are mostly observed in heavy metals/ferromagnet (oxide) heterostructures have not been reported in this system. Here, we present evidence for sizable DMI that is even comparable to the Co/Pt interface can also be realized at pure and oxidized Fe/MgO bilayers due to the Rashba effect. More importantly, we find that both the strength and chirality of DMI can be engineered via interfacial oxygen manipulation, e.g., oxidization degree. The microscopic mechanism of oxidization inducing 3d orbitals reconstruction of Fe atoms dominates the variation of DMI is also unveiled. Using micromagnetic simulations, we further confirm that zero-field chiral spin textures can be achieved at the designed Fe/MgO films. These results not only enrich the physics of Fe/MgO interface but also provide a possible strategy to tailor noncolinear magnetic interaction and topological magnetism in the ferromagnet/oxide system.

关键词： Dzyaloshinskii-Moriya interaction Magnetic texture Bilayer films Interfaces Density functional calculations Micromagnetic modeling

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Boosting flexible electronics with integration of two-dimensional materials

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InfoMat 2024年第7期6卷 1-50页

作者： Chongyang Hou Shuye Zhang Rui Liu Thomas Gemming Alicja Bachmatiuk Hongbin Zhao Hao Jia Shirong Huang Weijia Zhou Jian-Bin Xu Jinbo Pang Mark HRümmeli Jinshun Bi Hong Liu Gianaurelio Cuniberti Institute for Advanced Interdisciplinary Research(iAIR) University of JinanJinanthe People’s Republic of China State Key Laboratory of Advanced Welding and Joining Harbin Institute of TechnologyHarbinthe People’s Republic of China State Key Laboratory of Transducer Technology Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghaithe People’s Republic of China Institute for Materials Chemistry Leibniz Institute for Solid State and Materials Research Dresden(IFW Dresden)DresdenGermany Lukasiewicz Research Network PORT Polish Center for Technology DevelopmentWroclawPoland State Key Laboratory of Advanced Materials for Smart Sensing GRINM Group Co.LtdBeijingthe People’s Republic of China Institute for Materials Science and Max Bergmann Center of Biomaterials TUD Dresden University of TechnologyDresdenGermany Department of Electronic Engineering The Chinese University of Hong KongHong Kong SARthe People’s Republic of China Institute of Environmental Technology VSB-Technical University of OstravaOstravaCzech Republic College of Energy Soochow Institute for Energy and Materials InnovationsSoochow UniversitySuzhouthe People’s Republic of China Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province Soochow UniversitySuzhouthe People’s Republic of China Centre of Polymer and Carbon Materials Polish Academy of SciencesZabrzePoland School of Integrated Circuits University of Chinese Academy of SciencesBeijingthe People’s Republic of China Institute of Microelectronics of Tianjin Binhai New Area Tianjinthe People’s Republic of China Institute of Microelectronics Chinese Academy of SciencesBeijingthe People’s Republic of China State Key Laboratory of Crystal Materials Center of Bio and Micro/Nano Functional MaterialsShandong UniversityJinanthe People’s Republic of China

Flexible electronics has emerged as a continuously growing field of ***-dimensional(2D)materials often act as conductors and electrodes in elec-tronic devices,holding significant promise in the design of high-performance,flexible *** studies have focused on harnessing the potential of these materials for the development of such ***,to date,the incorporation of 2D materials in flexible electronics has rarely been summa-rized or ***,there is an urgent need to develop compre-hensive reviews for rapid updates on this evolving *** review covers progress in complex material architectures based on 2D materials,including interfaces,heterostructures,and 2D/polymer ***-ally,it explores flexible and wearable energy storage and conversion,display and touch technologies,and biomedical applications,together with integrated design *** the pursuit of high-performance and high-sensitivity instruments remains a primary objective,the integrated design of flexible electronics with 2D materials also warrants *** combin-ing multiple functionalities into a singular device,augmented by machine learning and algorithms,we can potentially surpass the performance of existing wearable ***,we briefly discuss the future trajectory of this burgeoning *** review discusses the recent advancements in flex-ible sensors made from 2D materials and their applications in integrated archi-tecture and device design.

关键词： 2D materials biomedical healthcare energy storage and conversion flexible electronics heterostructures sensors

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Growth of two-inch free-standing heteroepitaxial diamond on Ir/YSZ/Si (001) substrates via laser-patterned templates

arXiv

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arXiv 2024年

作者： Qu, Pengfei Jin, Peng Zhou, Guangdi Wang, Zhen Wang, Zhanguo Laboratory of Solid-State Optoelectronic Information Technology Institute of Semiconductors Chinese Academy of Sciences Beijing100083 China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Beijing100049 China

In this paper, 2-inch free-standing diamonds were prepared by using heteroepitaxy on composite Ir/YSZ/Si (001) substrates. To release stress, patterned templates were fabricated using laser etching after the initial growth of 50-nm-diamond. Then, the subsequent growth was completed on a patterned template. The full width at half maximum of the diamond (400) and (311) X-ray rocking curves were 313.5 and 359.3 arcsecs, respectively. Strong band-edge emission in the cathodoluminescence spectrum of the resulting diamond revealed excellent crystalline quality. Furthermore, the 2D mapping of Raman spectra was conducted on a 2 mm × 2 mm area located at the center of the 2-inch sample with a thickness of 400 µm. The result showed an average peak width of 2.85 ± 0.36 cm-1 and residual stress of -0.03 ± 0.37 GPa. The dislocation density, determined by counting etching pits generated from H2/O2 plasma etching, was estimated to be around 2.2 × 107 cm-2. These results evidence that the laser-patterned method can effectively release stress during the growth of large-size diamonds, offering a simpler and more cost-effective alternative to the traditional photolithography-patterned scheme. Copyright © 2024, The Authors. All rights reserved.

关键词： Cost effectiveness

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Machine Learning-Assisted Low-Dimensional Electrocatalysts Design for Hydrogen Evolution Reaction

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Nano-Micro Letters 2023年第12期15卷 161-187页

作者： Jin Li Naiteng Wu Jian Zhang Hong‑Hui Wu Kunming Pan Yingxue Wang Guilong Liu Xianming Liu Zhenpeng Yao Qiaobao Zhang College of Chemistry and Chemical Engineering and Henan Key Laboratory of Function‑Oriented Porous MaterialsLuoyang Normal UniversityLuoyang 471934People’s Republic of China New Energy Technology Engineering Lab of Jiangsu Province College of ScienceNanjing University of Posts and Telecommunications(NUPT)Nanjing 210023People’s Republic of China School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083People’s Republic of China Department of Chemistry University of Nebraska-LincolnLincolnNE 8588USA Henan Key Laboratory of High‑Temperature Structural and Functional Materials National Joint Engineering Research Center for Abrasion Control and Molding of Metal MaterialsHenan University of Science and TechnologyLuoyang 471003People’s Republic of China National Engineering Laboratory for Risk Perception and Prevention Beijing 100041People’s Republic of China Center of Hydrogen Science Shanghai Jiao Tong UniversityShanghai 200000People’s Republic of China State Key Laboratory of Metal Matrix Composites School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200000People’s Republic of China State Key Laboratory of Physical Chemistry of Solid Surfaces College of MaterialsXiamen UniversityXiamen 361005People’s Republic of China

Efficient electrocatalysts are crucial for hydrogen generation from electrolyzing ***,the conventional"trial and error"method for producing advanced electrocatalysts is not only cost-ineffective but also time-consuming and ***,the advancement of machine learning brings new opportunities for electrocatalysts discovery and *** analyzing experimental and theoretical data,machine learning can effectively predict their hydrogen evolution reaction(HER)*** review summarizes recent developments in machine learning for low-dimensional electrocatalysts,including zero-dimension nanoparticles and nanoclusters,one-dimensional nanotubes and nanowires,two-dimensional nanosheets,as well as other *** particular,the effects of descriptors and algorithms on screening low-dimensional electrocatalysts and investigating their HER performance are ***,the future directions and perspectives for machine learning in electrocatalysis are discussed,emphasizing the potential for machine learning to accelerate electrocatalyst discovery,optimize their performance,and provide new insights into electrocatalytic ***,this work offers an in-depth understanding of the current state of machine learning in electrocatalysis and its potential for future research.

关键词： Machine learning Hydrogen evolution reaction Low-dimensional electrocatalyst Descriptor Algorithm

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