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arXiv 2025年

作者： Wang, Xiangqi Wang, Cong Wang, Yupeng Ye, Chunhui Rahman, Azizur Zhang, Min Son, Suhan Tan, Jun Zhang, Zengming Ji, Wei Park, Je-Geun Zhang, Kai-Xuan Jihua Laboratory Testing Center Jihua Laboratory Foshan528000 China Beijing Key Laboratory of Optoelectronic Functional Materials & Micro-Nano Devices School of Physics Renmin University of China Beijing100872 China Renmin University of China Beijing100872 China Deep Space Exploration Laboratory The Centre for Physical Experiments CAS Key Laboratory of Strongly Coupled Quantum Matter Physics Department of Physics School of Physical Sciences University of Science and Technology of China Hefei230026 China Institutes of Physical Science and Information Technology Anhui University Hefei230601 China Department of Physics and Astronomy Seoul National University Seoul08826 Korea Republic of Center for Quantum Materials Department of Physics and Astronomy Seoul National University Seoul08826 Korea Republic of Institute of Applied Physics Seoul National University Seoul08826 Korea Republic of

Van der Waals (vdW) magnets, with their two-dimensional (2D) atomic structures, provide a unique platform for exploring magnetism at the nanoscale. Although there have been numerous reports on their diverse quantum properties, the emergent interfacial magnetism—artificially created at the interface between two layered magnets—remains largely unexplored. This work presents observations of such emergent interfacial magnetism at the ferromagnet/antiferromagnet interface in a vdW heterostructure. We report the discovery of an intermediate Hall resistance plateau in the anomalous Hall loop, indicative of emergent interfacial antiferromagnetism fostered by the heterointerface. This plateau can be stabilized and further manipulated under varying pressures but collapses under high pressures over 10 GPa. Our theoretical calculations reveal that charge transfer at the interface is pivotal in establishing the interlayer antiferromagnetic spin-exchange interaction. This work illuminates the previously unexplored emergent interfacial magnetism at a vdW interface comprised of a ferromagnetic metal and an antiferromagnetic insulator, and highlights its gradual evolution under increasing pressure. These findings enrich the portfolio of emergent interfacial magnetism and support further investigations on vdW magnetic interfaces and the development of next-generation spintronic devices. Copyright © 2025, The Authors. All rights reserved.

关键词： Van der Waals forces

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Cooperation and competing of antipolar charge order and superconducting states in a quasi-2D superatomic metallic crystal

arXiv

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arXiv 2025年

作者： Xing, Shuya Wei, Zhongxu Chen, Xu Zhang, Junming Yuan, Zhenyu Zhao, Jiali Jin, Feng Sun, Tao Ren, Huifen Cui, Minjie Chang, Hong Ying, Tianping Guo, Jiangang Chen, Xiaolong Zhao, Shifeng Zhou, Wenping Li, Xinqi Qian, Tian Cheng, Zhihai Research Center for Quantum Physics and Technologies Inner Mongolia University Hohhot010021 China Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing100190 China Beijing Key Laboratory of Optoelectronic Functional Materials & Micro-nano Devices Department of Physics Renmin University of China Beijing100872 China School of Physical Science and Technology Inner Mongolia University Hohhot010021 China Inner Mongolia Key Laboratory of Microscale Physics and Atom Innovation Inner Mongolia University Hohhot010021 China

Exploring various unexpected new quantum states and their corresponding extraordinary physics in low dimensional quantum materials, and investing them into application fields, is a primary concern of condensed matter physics. Previously, we performed joint experiments and theoretical calculations to investigate a superatomic crystal of Au6Te12Se8 with low symmetry, which stacks through non-covalent inter-cube quasi-bonds. Au6Te12Se8 exhibits a triple-cube charge density wave and spatially polarized metallic states interweaving at 9 K. In addition, it undergoes a BKT phase transition at 2.8 K to form a quasi-two-dimensional superconducting state. The subsequent high-pressure experimental results indicate that the two quantum states above compete with superconductivity. Here, we experimentally revealed competition and coexistence among superconductivity, triple-cube charge density waves, and polarized metallic states during further temperature-decreasing process, as examined using ultra-low temperature scanning tunneling microscopy/spectroscopy, transport measurement, and Raman spectra. An extraordinary inversion symmetry broken emerged inside the triple-cube-period of the original CDW at 300 mK, leading to the polarized metallic states transforming into parallel polarization states. The evidence of spontaneous polarization coexisting with superconductivity in real space is extremely rare and has been revealed by STM. In addition, transport and Raman measurements indicate that there are multiple phase transition temperatures from 80 K to that below the superconducting transition temperature of Au6Te12Se8, which may also contain more unknown exotic quantum states, providing a platform for further exploration of intriguing physical properties. © 2025, CC BY-NC-SA.

关键词： Charge density waves

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Maximal quantum Interaction between Free Electrons and Photons

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Physical Review Letters 2025年第4期134卷 043803-043803页

作者： Zetao Xie Zeling Chen Hao Li Qinghui Yan Hongsheng Chen Xiao Lin Ido Kaminer Owen D. Miller Yi Yang Department of Physics and HK Institute of Quantum Science and Technology The University of Hong Kong Pokfulam Hong Kong China Z. X. and Z. C. contributed equally to this Letter. Department of Applied Physics and Energy Sciences Institute Yale University New Haven Connecticut 06520 USA Interdisciplinary Center for Quantum Information State Key Laboratory of Modern Optical Instrumentation College of Information Science and Electronic Engineering Zhejiang University Hangzhou 310027 China Solid State Institute and Faculty of Electrical and Computer Engineering Technion—Israel Institute of Technology 32000 Haifa Israel

The emerging field of free-electron quantum optics enables electron-photon entanglement and holds the potential for generating nontrivial photon states for quantum information processing. Although recent experimental studies have entered the quantum regime, rapid theoretical developments predict that qualitatively unique phenomena only emerge beyond a certain interaction strength. It is thus pertinent to identify the maximal electron-photon interaction strength and the materials, geometries, and particle energies that enable one to approach it. We derive an upper limit to the quantum vacuum interaction strength between free electrons and single-mode photons, which illuminates the conditions for the strongest interaction. Crucially, we obtain an explicit energy selection recipe for electrons and photons to achieve maximal interaction at arbitrary separations and identify two optimal regimes favoring either fast or slow electrons over those with intermediate velocities. We validate the limit by analytical and numerical calculations on canonical geometries and provide near-optimal designs indicating the feasibility of strong quantum interactions. Our findings offer fundamental intuition for maximizing the quantum interaction between free electrons and photons and provide practical design rules for future experiments on electron-photon and electron-mediated photon-photon entanglement. They should also enable the evaluation of key metrics for applications such as the maximum power of free-electron radiation sources and the maximum acceleration gradient of dielectric laser accelerators.

关键词： quantum optics

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A review of nano-reactive multilayered films and their applications in micro-energetic igniters

FirePhysChem

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FirePhysChem 2025年

作者： Xu, Jianbing Zhang, Jiangtao Ye, Yinghua Zhou, Yuxuan Lai, Yuan Shen, Ruiqi Department of Applied Chemistry School of Chemistry and Chemical Engineering Nanjing University of Science and Technology Nanjing210094 China The State Key Laboratory of Transient Chemical Effects and Control Shaanxi Applied Physics and Chemistry Research Institute Shaanxi Xi'an710061 China Micro-Nano Energetic Devices Key Laboratory of MIIT Nanjing210094 China Institute of Space Propulsion Nanjing University of Science and Technology Nanjing210094 China

nano-reactive multilayer films consisting of alternating layers of the nano-aluminum and nano-metal oxide is a new type of nano thermite. These multilayer films can be stimulated by an external energy to promptly release stored chemical energy in a sudden emission of light and heat, which has high energy releasing rate and energy transforming efficiency since the scale of the composite components for nanoscale and the reaction mechanism based on the interaction between molecules. This multilayer composite film can be prepared by Complementary Metal-Oxide-Semiconductor (CMOS) compatible technology with magnetron sputtering, and can be integrated with circuit chips to construct micro-nano energetic devices. In this paper, the influence of processing parameters on the structure and properties of nano-reactive multilayer films is analyzed systematically. And the application of reactive multilayer films in micro igniter is also introduced. In addition, the application prospect and development direction of nano-reactive multilayer films in micro-nano energetic devices are prospected. © 2025

关键词： Oxide semiconductors

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Novel Antigen-Presenting Cell-Targeted nanoparticles Enhance Split Vaccine Immunity Through microneedles Inoculation

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International Journal of nanomedicine 2025年 20卷 5529-5549页

作者： Xiu, Xueliang Fu, Hongyang Zhang, Ruipeng Ma, Shichao Guo, Panpan Li, Zhipeng Zhu, Yihan Ma, Fengsen College of Pharmacy Zhejiang University of Technology China Department of Dermatology First Affiliated Hospital of Zhejiang Chinese Medical University (Zhejiang Provincial Hospital of Chinese Medicine) Hangzhou 310006 China Emergency Department Beijing Tiantan Hospital Capital Medical University 100070 Beijing China State Key Laboratory of Green Technologies for Chemical Synthesis and Conversion College of Chemical Engineering Zhejiang University of Technology Hangzhou 310014 China Micro-nano Scale Biomedical Engineering Laboratory Institute for Frontiers and Interdisciplinary Sciences Zhejiang University of Technology Hangzhou 310014 China Zhejiang Provincial Key Laboratory of Quantum Precision Measurement Hangzhou 310023 China

Aim/Background: Despite their superior safety and widespread use, split vaccines typically suffer from reduced immunogenicity due to the lack of an intact viral structure. Targeting the mannose receptors on antigen-presenting cells (APCs) with nanoparticles (NPs) and delivering them via microneedles (MNs) offers a promising solution. We designed and synthesized NPs that could form complexes with split H1N1 antigens, and evaluated the immunogenicity after loading them into dissolvable microneedle arrays (dMAs). Methods: Man-N-HACC was synthesized by conjugating mannose moieties to N-2-hydroxypropyl trimethyl ammonium chloride chitosan (N-HACC), followed by cross-linking with tripolyphosphate to form Man-N-HACC NPs. The NPs were characterized in terms of morphology, size, zeta potential, spatial orientation, macrophage internalization, and stability. The microstructure, mechanical strength, skin penetration capability, and release behavior of dMAs loaded with Man-N-HACC NPs/H1N1 complexes were investigated. Finally, the efficacy of dMAs was assessed in a rat model using ELISA and hemagglutination inhibition (HAI) assay. Results: Characterization via Fourier transform infrared spectroscopy and nuclear magnetic resonance confirmed the synthesis of Man-N-HACC. The cross-linked generated Man-N-HACC NPs displayed uniform morphology and good stability over 28 days, along with confirmed spatial orientation of mannose ligands and macrophage internalization. The dMAs loaded with Man-N-HACC NPs/ H1N1 exhibited mechanical robustness, capable of fully penetrating the skin and releasing nanovaccines. The increase in HAI titers and total IgG antibody levels in rat serum indicates the effectiveness of humoral immunity, and this effect only occurs after NPs formed post-crosslinking, rather than directly using raw nanomaterials, highlighting the critical role of the nanoparticle structure. Conclusion: This study confirms that the delivery of Man-N-HACC NPs via dMAs provides a novel an

关键词： dissolvable microneedle arrays mannose receptor nanoparticles split vaccine target

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A flexible nanostructured paper of MnO NPs@MWCNTs/r-GO multilayer sandwich composite for high-performance lithium-ion batteries

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Ceramics International 2017年第10期43卷 7588-7593页

作者： Li, Ya Wang, Panpan Bao, Yunxia Huang, Kai Hunan Key Laboratory for Micro-Nano Energy Materials and Devices Laboratory for Quantum Engineering and Micro-Nano Energy Technology School of Physics and Optoelectronics Xiangtan University Hunan411105 China

Designing a high capacity and long cycle life MnO-based composite material for lithium ion batteries (LIBs) is still a great challenge because of the intrinsically low electrical conductivity and dramatic volume variations during lithiation/delithiation. In this paper, the MnO nanoparticles (MnO NPs) are recombined with multi-walled carbon nanotubes (MWCNTs) and reduced graphene oxide (r-GO) to rationally construct a novel MnO NPs@MWCNTs/r-GO multilayer sandwich structure via electrostatic interaction self-assembly and vacuum filtration processes. As a result, the MnO NPs are closely attracted in the conductive MWCNTs network, and the MWCNTs adsorbed on the surface of MnO NPs can be served as a soft and flexible carbon coating layer to self-adapt the huge volume expansion. For another, the r-GO between two MnO NPs@MWCNTs layers is the cause to form a free-standing paper, enhancing the transverse conductivity of the whole electrode simultaneously. These features will contribute to achieve excellent cycling stability and improved rate capability. © 2017 Elsevier Ltd and Techna Group S.r.l.

关键词： Manganese oxide

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Synthesizing nitrogen-doped porous carbon@sulfur cathode for high-performance and stable cycling Li-S batteries

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Journal of Alloys and Compounds 2017年 691卷 613-618页

作者： Wang, Haotian Huang, Kai Wang, Panpan Zhong, Jiangxin Hunan Key Laboratory for Micro-Nano Energy Materials and Devices Laboratory for Quantum Engineering and Micro-Nano Energy Technology School of Physics and Optoelectronics Xiangtan University Hunan411105 China

The rechargeable Lithium-Sulfur battery has been regarded as a promising candidate for the next generation energy storage devices owing to its high energy density, low cost and environment friendliness. The further development of Li-S battery, however, is still hindered by capacity decay and kinetics sluggish caused by the poor electrochemical activity and polysulfide shuttle effect. Herein, a nitrogen-doped porous carbon framework is synthesized by a facial strategy, delivering large special surface area and narrow pore size distribution. As a result, the composited cathode with sulfur loading of 62% shows an excellent rate performance and extreme cycling stability (100 cycles at 1.0 C and 457 mAh g−1after 500 cycles at 2.0 C), which demonstrates that the N-doped porous carbon host can effectively improve the transport of electron and ion, entrap the dissolved polysulfide, thus improving the electrochemical performance significantly in rate performance and cycle stability. © 2016 Elsevier B.V.

关键词： Lithium sulfur batteries

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Effect of crystal field on the formation and diffusion of oxygen vacancy at anatase(101)surface and sub-surface

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Progress in Natural Science:Materials International 2020年第1期30卷 128-133页

作者： Wenjin Yin Bo Wen Qingxia Ge Xiaolin Wei Gilberto Teobaldi Limin Liu Laboratory of Quantum Devices and Micro-Nano Dynamics School of Physics and Electronic ScienceHunan University of Science and Technology Xiangtan School of Physics Beihang University Beijing Computational Science Research Center Department of Physics and Laboratory for Quantum Engineering and Micro-Nano Energy Technology Xiangtan University Stephenson Institute for Renewable Energy and Department of Chemistry The University of Liverpool

The intrinsic oxygen vacancy（O;） in TiO;is a vital topic of semiconductor ***,we use the firstprinciples calculations to explore the formation and diffusion properties of O;at anatase（101） slab,combined with the crystal filed *** calculated result shows that O;at subsurface is not only more stable than that at surface,but also prefers to cluster together at *** stability of O;at subsurface is mainly attributed to the Ti3d orbitals in different crystal fields occupied by the excess *** calculation reveals that the O;diffusion is greatly affected by the excess *** results presented here show the importance of 3d orbitals in different crystal field,which should be helpful to understand the behavior of O;at other transition metal oxide.

关键词： The first-principles calculation Crystal field Oxygen vacancy TiO 2

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Strongly Hybridized Phonons in One-Dimensional van der Waals Crystals

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Physical Review Letters 2025年第17期134卷 176101-176101页

作者： Shaoqi Sun Qingyun Lin Yihuan Li Daichi Kozawa Huizhen Wu Shigeo Maruyama Pilkyung Moon Toshikaze Kariyado Ryo Kitaura Sihan Zhao School of Physics Zhejiang Key Laboratory of Micro-Nano Quantum Chips and Quantum Control and State Key Laboratory of Silicon and Advanced Semiconductor Materials Zhejiang University Hangzhou 310058 China Center of Electron Microscopy School of Materials Science and Engineering Zhejiang University Hangzhou 310027 China Research Center for Materials Nanoarchitectonics (MANA) National Institute for Materials Science (NIMS) 1-1 Namiki Tsukuba 305-0044 Japan Department of Mechanical Engineering The University of Tokyo Tokyo 113-8656 Japan Arts and Sciences NYU Shanghai Shanghai 200124 China NYU-ECNU Institute of Physics at NYU Shanghai Shanghai 200062 China

The phenomena of pronounced electron-electron and electron-phonon interactions in one-dimensional (1D) systems are ubiquitous, which are well described by frameworks of Luttinger liquid, Peierls instability, and concomitant charge density wave. However, the experimental observation of strongly hybridized phonons in 1D was not demonstrated. Herein we report the first observation of strongly hybridized phonons in 1D condensed matters by using double-walled carbon nanotubes (DWNTs), representative 1D van der Waals crystals, by combining the spectroscopic and microscopic tools as well as the ab initio density functional theory (DFT) calculations. We observe uncharted phonon modes in one commensurate and three incommensurate DWNT crystals, three of which concurrently exhibit strongly reconstructed electronic band structures. Our DFT calculations for the experimentally observed commensurate DWNT (7, 7) @ (12, 12) reveal that this new phonon mode originates from a (nearly) degenerate coupling between two transverse acoustic modes (ZA modes) of constituent inner and outer nanotubes having approximately trigonal and pentagonal rotational symmetry along the nanotube circumferences. Such coupling strongly hybridizes the two phonon modes in different shells and leads to the formation of a unique lattice motion featuring evenly distributed vibrational amplitudes over inner and outer nanotubes, distinct from any known phonon modes in 1D systems. All four DWNTs that exhibit the pronounced new phonon modes show small chiral angle twists, closely matched diameter ratios of 35 and decreased frequencies of new phonon modes with increased diameters, all supporting the uncovered coupling mechanism. Our discovery of strongly hybridized phonons in DWNTs opens new opportunities for engineering phonons and exploring novel phonon-related phenomena in 1D condensed matters.

关键词： Van der Waals forces

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Tunable altermagnetism via inter-chain engineering in parallel-assembled atomic chains

arXiv

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arXiv 2025年

作者： Guo, Deping Zong, Canbo Zhang, Weihan Wang, Cong Liu, Junwei Ji, Wei College of Physics and Electronic Engineering Center for Computational Sciences Sichuan Normal University Chengdu610101 China Beijing Key Laboratory of Optoelectronic Functional Materials & Micro-Nano Devices School of Physics Renmin University of China Beijing100872 China Renmin University of China Beijing100872 China Department of Physics Hong Kong University of Science and technology 999077 Hong Kong

Altermagnetism has recently drawn considerable attention in three- and two-dimensional materials. Here, we extend this concept to quasi-one-dimensional (Q1D) monolayers assembled from single-atomic magnetic chains. Through systematically examining nine types of structures, two stacking orders, and intra/inter-chain magnetic couplings, we identify four out of thirty promising structural prototypes for hosting altermagnetism, which yields 192 potential monolayer materials. We further confirm eight thermodynamically stable Q1D monolayers via high-throughput calculations. Using symmetry analysis and first-principles calculations, we find that the existence of altermagnetism is determined by the type of inter-chain magnetic coupling and predict three intrinsic altermagnets, CrBr3, VBr3, and MnBr3, due to their ferromagnetic inter-chain couplings and five extrinsic ones, CrF3, CrCl3, CrI3, FeCl3, and CoTe3, ascribed to their neglectable or antiferromagnetic inter-chain couplings. Moreover, the inter-chain magnetic coupling here is highly tunable by manipulating the inter-chain spacing, leading to experimentally feasible transitions between altermagnetic and nodal-line semiconducting states. In addition, applying external electric fields can further modulate the spin splitting. Our findings establish a highly tunable family of Q1D altermagnets, offering fundamental insights into the intricate relationship between geometry, electronic structure, and magnetism. These discoveries hold significant promises for experimental realization and future spintronic applications. Copyright © 2025, The Authors. All rights reserved.

关键词： Ferromagnetism

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