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Planar Hall plateau in magnetic Weyl semimetals

Science Bulletin 2025年第2期70卷 187-192页

作者： Lei Li Chaoxi Cui Run-Wu Zhang Zhi-Ming Yu Yugui Yao Centre for Quantum physics Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurement(MOE)School of PhysicsBeijing Institute of TechnologyBeijing 100081China Beijing Key Lab of Nanophotonics&Ultrafine Optoelectronic Systems School of PhysicsBeijing Institute of TechnologyBeijing 100081China International Center for Quantum Materials Beijing Institute of TechnologyZhuhai 519000China

Despite the rapid progress in the study of planar Hall effect(PHE)in recent years,all the previous works only showed that the PHE is connected to local geometric quantities,such as Berry ***,for the first time,we point out that the PHE in magnetic Weyl semimetals is directly related to a global quantity,namely,the Chern number of the Weyl *** leads to a remarkable consequence that the PHE observation predicted here is robust against many system details,including the Fermi *** main difference between non-magnetic and magnetic Weyl points is that the latter breaks time-reversal symmetry T,thus generally possessing an energy *** semiclassical Boltzmann theory,we investigate the PHE in generic magnetic Weyl models with energy tilt and arbitrary Chern *** find that by aligning the magnetic and electric fields in the same direction,the trace of the PHE conductivity contributed by Berry curvature and orbital moment is proportional to the Chern number and the energy tilt of the Weyl points,resulting in a previously undiscovered quantized PHE plateau by varying the Fermi *** further confirm the existence of PHE plateaus in a more realistic lattice model without T *** proposing a new quantized physical quantity,our work not only provides a new tool for extracting the topological character of the Weyl points but also suggests that the interplay between topology and magnetism can give rise to intriguing physics.

关键词： Magnetic Weyl semimetals Planar Hall effect Quantized plateau Chern number

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Recent development in electrode design for wide-temperature supercapacitors

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Science China Chemistry 2025年第1期68卷 96-117页

作者： Jianhong Liu Qiang Zhou Yuxiao Lin Xinsheng Zhao Guangmin Zhou Xiaoxiao Li school of physics and Electronic Engineering Jiangsu Normal UniversityXuzhou 221116China Tsinghua-Berkeley Shenzhen Institute&Tsinghua Shenzhen International Graduate school Tsinghua UniversityShenzhen 518055China

An ever-increasing market demand has stimulated the soaring enthusiasm of researchers to develop wide-temperature supercapacitors(SCs).The active electrode is one of the most important parts of SC,which is directly related to the energy density,power transmission and long-term cyclability of the device in the wide-temperature *** with the SC electrodes aimed for room-temperature application,the SC electrodes for operating at wide-temperature scene often face greater *** this review,the main challenges of SC electrodes under various temperature conditions,including low,high and cross-fade temperatures,are *** relevant performance decay and failure mechanisms of wide-temperature SC electrodes are *** addition,this review deals with the recent studies and developments in robust wide-temperature SC electrodes with respect to the rational design of electrode structures and the exploitation of advanced active ***,the future directions for exploring reliable wide-temperature SCs are also proposed.

关键词： supercapacitor wide-temperature electrode design active materials

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Noncommutativity and its role in constant-roll inflation models with non-minimal coupling constrained by swampland conjectures

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Chinese physics C 2025年第02期 241-258页

作者： Saeed Noori Gashti Mohammad Reza Alipour Mohammad Ali S.Afshar Jafar Sadeghi school of physics Damghan University Department of physics Faculty of Basic SciencesUniversity of Mazandaran

In this paper, using Hamiltonian formalism, we obtain solutions for constant-roll inflation according to the noncommutativity and the non-minimal coupling field of the Lagrangian. We consider three different types of couplings: power-law, exponential, and logarithmic. Subsequently, by plotting some figures, we study the effects of these coupling in constant-roll inflation with noncommutative parameters. We identify and specify the permissible regions of each case of the swampland conjecture and determine the best model. We find that the exponential, logarithmic, and power-law couplings with θ>0 ar results in both cases, some of which are compatible and some incompatible with the dS swampland ***,θ>0 is more compatible than θ<0, and the consistency value in the second boundary condition is much higher than in the first. The order of better compatibility of couplings with the swampland conjecture is ranked as follows: exponential non-minimal coupling, logarithmic non-minimal coupling, and power-law non-minimal coupling. For each type of coupling, we calculate the values of the scalar spectral index n s and the tensor-to-scalar ratio r for two different potentials and compare them with the observational data from Planck 2018. We also determine the range of the free parameters(a, b, q)model consistent with the conjecture. We find that the model satisfies the FRDSSC for all types of couplings and both potentials, with some constraints on the parameters.

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Nonlinear optical oscillation in on-chip erbium-doped lithium niobate microring resonators

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Science China(physics,Mechanics & Astronomy) 2025年第04期Mechanics & Astronomy) .卷 116-122页

作者： Ru Zhang Xianhong Zeng Xueshan Zheng Chen Yang Dahuai Zheng Hongde Liu Xuanyi Yu Feng Gao Fang Bo Yongfa Kong Guoquan Zhang Jingjun Xu school of physics and Information Engineering Shanxi Normal University MOE Key Laboratory of Weak-Light Nonlinear Photonics TEDA Institute of Applied Physics and School of Physics Nankai University

Erbium-doped lithium niobate(LN) on insulator active devices, such as lasers and amplifiers, have received increasing attention. The nonlinear optical oscillation in them at high power destabilizes the output of signals and cannot be ignored. In this study, we reported the experimental observation and theoretical analysis of the nonlinear optical oscillation in erbiumdoped lithium niobate-on-insulator(LNOI) microring resonators while scanning the pump wavelength. Under the same pump power, the number of oscillation cycles decreases when the wavelength scanning rate increases from 10.6 to 33.9 nm/μs. A theoretical model based on the competition between the thermo-optic nonlinearity and the photorefractive effect was introduced to interpret the oscillation in transmission. A series of parameters were obtained from the comparison between the theoretical and experimental results; some of them, the relaxation rates of the thermal and the electric field, are significantly different from those of undoped LNOI microcavities. This work provides a valuable reference for future applications of active LNOI devices.

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Constructing 2D bismuth-based heterostructure for highly efficient photocatalytic CO2 reduction

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Tungsten 2025年第1期7卷 71-79页

作者： Ruo-Hang Xu Hao-Yu Jiang Dan-Dan Cui Kun-Rong Du Hong-Run Zhang Sheng-Jie Xu Ya-Qi Li Zhi-Zhen Ren Liang Wang Wei-Chang Hao Yi Du school of physics and BUAA-UOW Joint Research Centre Beihang University Shenzhen Institute of Beihang University Centre for Catalysis and Clean Energy School of Environment and Science Griffith University

Reforming carbon dioxide（CO2） into fuels and valuable chemicals using solar energy holds significant potential for emission reduction and addressing energy supply *** recombination of photocarriers remains a major obstacle,however,to enhancing solar energy conversion efficiency in the photocatalytic reaction *** two-dimensional materials,constructing heterogeneous structures has emerged as an effective strategy to enhance the separation of photoexcited carriers by leveraging the internal electric field at the heterogeneous ***,we present a facile strategy for preparing Bi4NbO8Br/Bi2WO6plate-on-plate Z-scheme junctions with a strong internal electric field by in situ *** unique heterostructure facilitates efficient separation and transport of photoexcited charges by harnessing the internal electric field induced by chemical bonding at the lateral ***,the Bi4NbO8Br/Bi2WO6heterostructure exhibits enhanced CO2photoreduction properties,along with a CO yield rate of approximately 35 μmol·g-1·h-1under full light *** work offers novel insights into the synthesis of unique hetero structures intended to enhance the efficiency of photocatalytic CO2reduction.

关键词： Bi4NbO8Br/Bi2WO6 CO2 reduction Heterostructures Photocatalysts

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AI-Driven Inverse Design of Materials:Past,Present,and Future

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Chinese physics Letters 2025年第2期42卷 135-174页

作者： Xiao-Qi Han Xin-De Wang Meng-Yuan Xu Zhen Feng Bo-Wen Yao Peng-Jie Guo Ze-Feng Gao Zhong-Yi Lu school of physics Renmin University of ChinaBeijing 100872China school of physics and Information Shaanxi Normal UniversityXi’an 710119China

The discovery of advanced materials is a cornerstone of human technological development and *** structures of materials and their corresponding properties are essentially the result of a complex interplay of multiple degrees of freedom such as lattice,charge,spin,symmetry,and *** poses significant challenges for the inverse design methods of *** have long explored new materials through numerous experiments and proposed corresponding theoretical systems to predict new material properties and *** the improvement of computational power,researchers have gradually developed various electronic-structure calculation methods,such as the density functional theory and high-throughput computational ***,the rapid development of artificial intelligence(AI)technology in computer science has enabled the effective characterization of the implicit association between material properties and structures,thus forming an efficient paradigm for the inverse design of functional *** progress has been achieved in the inverse design of materials based on generative and discriminative models,attracting widespread interest from *** this rapid technological progress,in this survey,we examine the latest advancements in AI-driven inverse design of materials by introducing the background,key findings,and mainstream technological development *** addition,we summarize the remaining challenges for future *** survey provides the latest overview of AI-driven inverse design of materials,which can serve as a useful resource for researchers.

关键词： materials. inverse corners

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PandaX-xT——A deep underground multi-ten-tonne liquid xenon observatory

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Science China(physics,Mechanics & Astronomy) 2025年第2期68卷 105-120页

作者： Abdusalam Abdukerim Zihao Bo Wei Chen Xun Chen Chen Cheng Zhaokan Cheng Xiangyi Cui Yingjie Fan Deqing Fang Lisheng Geng Karl Giboni Linhui Gu Xunan Guo Xuyuan Guo Zhichao Guo Chencheng Han Ke Han Changda He Jinrong He Di Huang Junting Huang Zhou Huang Ruquan Hou Yu Hou Xiangdong Ji Yonglin Ju Chenxiang Li Jiafu Li Mingchuan Li Shuaijie Li Tao Li Qing Lin Jianglai Liu Congcong Lu Xiaoying Lu Lingyin Luo Yunyang Luo Wenbo Ma Yugang Ma Yajun Mao Yue Meng Xuyang Ning Binyu Pang Ningchun Qi Zhicheng Qian Xiangxiang Ren Nasir Shaheed Xiaofeng Shang Xiyuan Shao Guofang Shen Lin Si Wenliang Sun Yi Tao Anqing Wang Meng Wang Qiuhong Wang Shaobo Wang Siguang Wang Wei Wang Xiuli Wang Xu Wang Zhou Wang Yuehuan Wei Mengmeng Wu Weihao Wu Yuan Wu Mengjiao Xiao Xiang Xiao Binbin Yan Xiyu Yan Yong Yang Chunxu Yu Ying Yuan Zhe Yuan Youhui Yun Xinning Zeng Minzhen Zhang Peng Zhang Shibo Zhang Shu Zhang Tao Zhang Wei Zhang Yang Zhang Yingxin Zhang Yuanyuan Zhang Li Zhao Jifang Zhou Ning Zhou Xiaopeng Zhou Yong Zhou Yubo Zhou Zhizhen Zhou New Cornerstone Science Laboratory Tsung-Dao Lee InstituteShanghai Jiao Tong UniversityShanghai 200240China school of physics and Astronomy Shanghai Jiao Tong UniversityKey Laboratory for Particle Astrophysics and Cosmology(MoE)Shanghai Key Laboratory for Particle Physics and CosmologyShanghai 200240China Shanghai Jiao Tong University Sichuan Research Institute Chengdu 610213China school of physics Sun Yat-sen UniversityGuangzhou 510275China Sino-French Institute of Nuclear Engineering and Technology Sun Yat-sen UniversityZhuhai 519082China Department of physics Yantai UniversityYantai 264005China Key Laboratory of Nuclear physics and Ion-beam Application(MOE) Institute of Modern PhysicsFudan UniversityShanghai 200433China school of physics Beihang UniversityBeijing 102206China Peng Huanwu Collaborative Center for Research and Education Beihang UniversityBeijing 100191China Beijing Key Laboratory of Advanced Nuclear Materials and physics Beihang UniversityBeijing 102206China Southern Center for Nuclear-Science Theory(SCNT) Institute of Modern PhysicsChinesen Academy of SciencesHuizhou 516000China Yalong River Hydropower Development Company Ltd.Chengdu 610051China school of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 200240China Department of physics University of MarylandCollege ParkMaryland 20742USA State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China Department of Modern physics University of Science and Technology of ChinaHefei 230026China Research Center for Particle Science and Technology Institute of Frontier and Interdisciplinary ScienceShandong UniversityQingdao 266237China Key Laboratory of Particle physics and Particle Irradiation of Ministry of Education Shandong UniversityQingdao 266237China State Key Laboratory of Nuclear physics and Technology School of PhysicsPeking UniversityBeijing 100871China school of physics Nankai UniversityTianjin 300071China SJTU Paris Elite I

We propose a major upgrade to the existing PandaX-4T experiment at the China Jinping Underground *** new experiment,PandaX-xT,will be a multi-ten-tonne liquid xenon,ultra-low background,and general-purpose *** full-scaled PandaX-xT contains a 43-t liquid xenon active *** an experiment will significantly advance our fundamental understanding of particle physics and *** sensitivity of dark matter direct detection will be improved by nearly two orders of magnitude compared to the current best limits,approaching the so-called“neutrino floor”for a dark matter mass above 10 GeV/c^(2),providing a key test to the Weakly Interacting Massive Particle *** searching for the neutrinoless double beta decay of^(136)Xe isotope in the detector,the effective Majorana neutrino mass can be measured to a 10-41 meV/c^(2) sensitivity,providing a key test to the Dirac/Majorana nature of *** neutrinos and other ultra-rare interactions can also be measured and searched for with an unprecedented background level,opening up new windows of *** on the findings,PandaX-xT will seek the next stage upgrade utilizing isotopic separation of natural xenon.

关键词： dark matter neutrino less double beta decay astrophysical neutrinos liquid xenon

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Decycling Number of Type-k Halin Graphs

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Journal of Mathematical Research with Applications 2025年第2期 143-151页

作者： Wanjia ZHANG Chao YANG Han REN school of Mathematics and physics Xinjiang Hetian College school of Mathematics Physics and Statistics Shanghai University of Engineering Science school of Mathematical Sciences East China Normal University

A set S of vertices of a graph G is called a decycling set if G-S is *** smallest size of a decycling set is called the decycling number of G and is denoted by?(G).In this paper,we investigate the decycling number of type-k Halin graphs,focusing on those that are formed from trees that have just two degrees k and *** any type-k Halin graph G of order n,we prove that■The result not only supports the largest forest conjecture due to Albertson and Berman (1976),but also offers a tight lower bound for the decycling number of type-3 Halin graphs and several type-k Halin ***,a new formula to determine the cardinality of any decycling set S of a type-k Halin graph G is provided.

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Vector meson’s spin alignments in high energy reactions

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Science China(physics,Mechanics & Astronomy) 2025年第1期68卷 1-16页

作者： Jin-Hui Chen Zuo-Tang Liang Yu-Gang Ma Xin-Li Sheng Qun Wang Key Laboratory of Nuclear physics and Ion-beam Application(MoE) Institute of Modern PhysicsFudan UniversityShanghai 200433China Institute of Frontier and Interdisciplinary Science Key Laboratory of Particle Physics and Particle Irradiation(MOE)Shandong UniversityQingdao 266237China INFN-Firenze Sesto Fiorentino FI 50019Italy Department of Modern physics University of Science and Technology of ChinaHefei 230026China school of Mechanics and physics Anhui University of Science and TechnologyHuainan 232001China

The global spin alignment of vector mesons has been observed by the STAR collaboration at the Relativistic Heavy Ion Collider(RHIC)at Brookhaven National Laboratory(BNL).It provides a unique opportunity to probe the correlation between the po-larized quark and antiquark in the strongly coupled quark-gluon plasma(sQGP)produced in relativistic heavy ion collisions,opening a new window to explore the properties of *** addition,spin alignments of vector mesons have also been observed in other high-energy particle collisions such as e^(+)e^(−)annihilations at high energies where hadron production is dominated by quark fragmentation *** results obtained are quite different from those obtained in heavy ion collisions where quark coalescence/combination mechanism dominates suggesting strong dependence on hadronization *** comprehensive studies in different hadronization processes are *** this article,we present a brief review of theoretical and experimen-tal advances in the study of vector meson’s spin alignments in a variety of high-energy particle collisions,with emphasis on hadronization mechanisms.

关键词： vector meson spin alignment global polarization relativistic heavy ion collisions fragmentation

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QED effects on Kerr-Newman black hole shadows

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Chinese physics C 2025年第02期 185-196页

作者：元绍冰罗昶恺胡泽州张震宇陈斌 school of physics Peking University Institute of Fundamental physics and Quantum Technology Ningbo University school of Physical Science and Technology Ningbo University Center for High Energy physics Peking University

By incorporating first-order QED effects, we explored the shadows of Kerr-Newman black holes with a magnetic charge through the numerical backward ray-tracing method. Our investigation encompassed both the direct influence of the electromagnetic field on light rays and the distortion of the background spacetime metric due to QED corrections. We found that the area of the shadow increases with the QED effect, mainly owing to the fact that the photons travel more slowly in the effective medium, making them more susceptible to being trapped by the black hole.

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