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Journal of Rare Earths 2024年第7期42卷 1344-1353,I0006页

作者： Mohsen Choupani Ahmad Gholizadeh school of {1. Damghan UniversityDamghan36716-45667Iran

The doping of the spinel ferrites with selective cations usually improves the properties of the parent *** effect of Co^(2+)/Gd^(3+)co-substitution on the microstructure,optical,and magnetic properties of Cu1.xCoxFe2-xGdxO4 prepared by the citrate-nitrate auto-combustion synthesis was *** of the samples was performed with powder X-ray diffraction(XRD),Raman and Fouriertransform infrared(FTIR)spectroscopy,field-emission scanning electron microscopy,X-ray energydispersive spectroscopy,UV-Vis spectroscopy,and a vibrating sample *** results of XRD,Raman,and FTIR analysis show a gradual structural phase transition from a tetragonal(I41.amd)structure to a cubic(Fd3m)*** bandgap energy of the studied samples is in a range of 1.57-1.75 eV with a minimum in sample x=0.06 and then *** investigations show that the presence of Co^(2+)/Gd^(3+)cations in an octahedral site of the copper ferrite structure could increase saturation magnetization and coercive field from 567.9 Oe and 23.62 emu/g to 929.4 Oe and 28.27 emu/g,respectively.

关键词： Spinel copper ferrite Citrate-nitrate method Structure phase transition Microstructure properties Magnetic properties Rare earths

Spectral observation of symmetry-protected selection rules for dynamical high-dimensional parity in alignment magnetic resonance

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Science China(physics,Mechanics & Astronomy) 2024年第10期67卷 1-11页

作者： Xu-Xing Geng Kai Jin Lu Zhou Wang-Wang Tang Guoqing Yang Shangqing Liang Shao-Ping Wu Guang-Ming Huang Gao-Xiang Li Department of physics Huazhong Normal UniversityWuhan 430079China College of Electronics and information Hangzhou Dianzi UniversityHangzhou 310018China State Key Laboratory of Precision Spectroscopy School of Physics and Electronic ScienceEast China Normal UniversityShanghai 200241China

Multidimensional Floquet-driven alignment systems with dynamical symmetry present various exotic phenomena and ***,there are challenges in directly characterizing large-spin dynamical symmetry from ***,we first observe the symmetry-protected selection rules of dynamical high-dimensional parity in a large-spin(F=4)*** theoretically construct a Floquet-driven alignment system that can be used to reveal high-dimensional spatiotemporal *** the experiment,the system is implemented in Cs atomic gas subjected to two-dimensional Floquet-modulated magnetic resonance *** developing Floquet detection protocols of alignment double-sided spectra,we directly verify symmetry-protected selection rules of dynamical high-dimensional parity for large-spin *** work advances the exploration of dynamical symmetry to large spins,and unravels a universal Floquet scheme for the investigation of symmetry-protected selection rules.

关键词： dynamical high-dimensional symmetry symmetry-protected selection rules large-spin alignment magnetic resonance,Floquet two-mode detection

Dynamical behavior of memristor-coupled heterogeneous discrete neural networks with synaptic crosstalk

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Chinese physics B 2024年第2期33卷 545-550页

作者：马铭磷熊康灵李志军贺少波 school of Automation and Electronic {1. Xiangtan UniversityXiangtan 411105China

Synaptic crosstalk is a prevalent phenomenon among neuronal synapses,playing a crucial role in the transmission of neural ***,considering synaptic crosstalk behavior and investigating the dynamical behavior of discrete neural networks are highly *** this paper,we propose a heterogeneous discrete neural network(HDNN)consisting of a three-dimensional KTz discrete neuron and a Chialvo discrete *** two neurons are coupled mutually by two discrete memristors and the synaptic crosstalk is *** impact of crosstalk strength on the firing behavior of the HDNN is explored through bifurcation diagrams and Lyapunov *** is observed that the HDNN exhibits different coexisting attractors under varying crosstalk ***,the influence of different crosstalk strengths on the synchronized firing of the HDNN is investigated,revealing a gradual attainment of phase synchronization between the two discrete neurons as the crosstalk strength decreases.

关键词： discrete memristor synaptic crosstalk coexisting attractor phase synchronization

Multiple mixed state variable incremental integration for reconstructing extreme multistability in a novel memristive hyperchaotic jerk system with multiple cubic nonlinearity

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Chinese physics B 2024年第2期33卷 238-246页

作者：王梦蛟辜玲芳 school of Automation and Electronic {1. Xiangtan UniversityXiangtan 411105China

Memristor-based chaotic systems with infinite equilibria are interesting because they generate extreme *** initial state-dependent dynamics can be explained in a reduced-dimension model by converting the incremental integration of the state variables into system ***,this approach cannot solve memristive systems in the presence of nonlinear terms other than the memristor *** addition,the converted state variables may suffer from a degree of *** allow simpler mechanistic analysis and physical implementation of extreme multistability phenomena,this paper uses a multiple mixed state variable incremental integration(MMSVII)method,which successfully reconstructs a four-dimensional hyperchaotic jerk system with multiple cubic nonlinearities except for the memristor term in a three-dimensional model using a clever linear state variable mapping that eliminates the divergence of the state ***,the simulation circuit of the reduced-dimension system is constructed using Multisim simulation software and the simulation results are consistent with the MATLAB numerical simulation *** results show that the method of MMSVII proposed in this paper is useful for analyzing extreme multistable systems with multiple higher-order nonlinear terms.

关键词： extreme multistability hyperchaotic jerk system nonlinearity

General multi-attack detection for continuous-variable quantum key distribution with local local oscillator

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Chinese physics B 2024年第5期33卷 255-262页

作者：康茁刘维琪齐锦贺晨 school of {1. Science and Technology Northwest UniversityXi'an 710127China

Continuous-variable quantum key distribution with a local local oscillator(LLO CVQKD)has been extensively researched due to its simplicity and *** practical security of an LLO CVQKD system,there are two main attack modes referred to as reference pulse attack and polarization attack ***,there is currently no general defense strategy against such attacks,and the security of the system needs further ***,we employ a deep learning framework called generative adversarial networks(GANs)to detect both *** first analyze the data in different cases,derive a feature vector as input to a GAN model,and then show the training and testing process of the GAN model for attack *** proposed model has two parts,a discriminator and a generator,both of which employ a convolutional neural network(CNN)to improve *** results show that the proposed scheme can detect and classify attacks without reducing the secret key rate and the maximum transmission *** only establishes a detection model by monitoring features of the pulse without adding additional devices.

关键词： CVQKD generative adversarial network attack classification

Detection accuracy of target accelerations based on vortex electromagnetic wave in keyhole space

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Chinese physics B 2024年第2期33卷 283-290页

作者：郭凯雷爽雷艺周红平郭忠义 school of Computer and {1. Hefei University of TechnologyHefei 230009China

The influence of the longitudinal acceleration and the angular acceleration of detecting target based on vortex electromagnetic waves in keyhole space are *** spectrum spreads of different orbital angular momentum(OAM)modes in different non-line-of-sight situations are *** errors of target accelerations in detection are calculated and compared based on the OAM spectra spreading by using two combinations of composite OAM modes in the keyhole *** to the research,the effects about spectrum spreads of higher OAM modes are more *** error in detection is mainly affected by OAM spectrum spreading,which can be reduced by reasonably using different combinations of OAM modes in different practical *** above results provide a reference idea for investigating keyhole effect when vortex electromagnetic wave is used to detect accelerations.

关键词： vortex electromagnetic waves detect accelerations keyhole space spectrum spread

Photoionisation detection of a single Er3+ ion with sub-1.0-ns time resolution

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National Science Review 2024年第4期11卷 38-45页

作者： Yangbo Zhang Wenda Fan Jiliang Yang Hao Guan Qi Zhang Xi Qin Changkui Duan Gabriele G.de Boo Brett C.Johnson Jeffrey C.Mc Callum Matthew J.Sellars Sven Rogge Chunming Yin Jiangfeng Du CAS Key Laboratory of Microscale Magnetic Resonance and school of Physical Sciences University of Science and Technology of China CAS Center for Excellence in Quantum information and Quantum {1. University of Science and Technology of China Hefei National Laboratory University of Science and Technology of China Centre of Excellence for Quantum Computation and Communication Technology School of Physics University of New South Wales Centre of Excellence for Quantum Computation and Communication Technology School of Engineering RMIT University Centre of Excellence for Quantum Computation and Communication Technology School of Physics University of Melbourne Centre of Excellence for Quantum Computation and Communication Technology Research School of Physics and Engineering Australian National University

Efficient detection of single optical centres in solids is essential for quantum information processing, sensing and single-photon generation *** this work,we use radio-frequency（RF） reflectometry to electrically detect the photoionisation induced by a single Er3+ion in *** high bandwidth and sensitivity of the RF reflectometry provide sub-1.0-ns time resolution for the photoionisation *** this technique,the optically excited state lifetime of a single Er3+ion in a Si nano-transistor is measured for the first time to be 0.49±0.04μ*** results demonstrate an efficient approach for detecting a charge state change induced by Er excitation and *** approach could be used for fast readout of other single optical centres in solids and is attractive for large-scale integrated optical quantum systems thanks to the multi-channel RF reflectometry demonstrated with frequency multiplexing techniques.

关键词： single optical centres erbium ions RF reflectometry photoionisation detection

Metallic Sb-stabilized porous silicon with stable SEI and high electron/ion conductivity boosting lithium-ion storage performance

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Rare Metals 2024年第9期43卷 4234-4242页

作者： Jia-Guo Deng Hao-Qin Feng Yu-Long Xu Si-Guang Guo Jian-Ping Li Kai-Fu Huo Ji-Jiang Fu Biao Gao Pual-K.Chu The State Key Laboratory of Refractories and Metallurgy and Institute of Advanced Materials and Nanotechnology Wuhan University of Science and TechnologyWuhan 430081China Wuhan National Laboratory for optoelectronics(WNLO) School of Optical and Electronic InformationHuazhong University of Science and TechnologyWuhan 430074China Department of physics Department of Materials Science&Engineeringand Department of Biomedical EngineeringCity University of Hong KongHong Kong 999077China

Silicon(Si)has mild discharge potential and high theoretical capacity,making it a highly desirable material for lithium-ion batteries(LIBs).Nevertheless,the excessive volume expansion,poor ion/electron conductiv ity and unstable solid electrolyte interface(SEI)hinde practical application to ***,the metallic antimony(Sb)stabilized porous Si(SiDSb)composite was prepared by magnesiothermic reduction of Sb_(2)O_(3)and Mg_(2)Si and chemical etching to remove the by-product of *** highly conductive Sb nanodots embedded in the Si liga ments promote not only the formation of conductive and stable LiF-rich SEI,but also the electron/ion transpor ability of *** to the outstanding bulk/interface stability,excellent conductivity,as well as ideal porous structure,the SiDSb electrode demonstrates a capacity of820 mAh·g^(-1.after undergoing 320 turns at 1.00 mA·g^(-1..Additionally,it exhibits a stable capacity of 675 m Ah·g^(-1.when tested at a higher current density of 5000 m A·g^(-1..The results reveal a viable solution to solve three problems at the same time,namely the poor conductivity,inferior SEI and excessive volume expansion of Si,boding well for the design of Si-based materials for high-energy LIBs.

关键词： Silicon Anodes Lithium-ion batteries Antimony Solid electrolyte interphase

Characteristic Study of Self-Powered Sensors Based on Native Protein Composite Film

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Energy & Environmental Materials 2024年第1期7卷 222-228页

作者： Jiehui Xue Huijing Xiang Yanrong Zhang Jun Yang Xia Cao Zhonglin Wang Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of SciencesBeijing 101400China school of Resources Environment and MaterialsSchool of PhysicsScience and TechnologyCenter on Nanoenergy ResearchGuangxi UniversityNanning 530004China Center for Green Innovation School of Mathematics and PhysicsUniversity of Science and Technology BeijingBeijing 100083China Research Centre of information Technology Shenzhen Institute of Information TechnologyShenzhen 518172China school of Chemistry and Biological Engineering University of Science and Technology BeijingBeijing 100083China school of Materials Science and Engineering Georgia Institute of TechnologyAtlanta GA 30332-0245USA

Flexible electronic sensors composed of flexible film and conductive materials play an increasingly important role in wearable and internet information *** has received more and more attention and made some progress over the ***,it is still a great challenge to prepare biocompatible and highly transparent conductive *** white is a pure natural protein-rich *** cellulose has a good compatibility and high transparency,which is an ideal material for flexible ***,we overcome the problem of poor mechanical flexibility and electrical conductivity of protein,and develop a high transparency and good flexibility hydroxypropylmethyl cellulose/egg white protein composite membrane-based triboelectric nanogenerator('X'-TENG).The experimental results show that the flexible pressure sensor based on'X'-TENG has a high sensitivity,fast response speed,and low detection *** can even be used as a touch/pressure sensing artificial electronic *** can also be made into an intelligent waffle keyboard for recording and tracking users of the *** strategy may provide a new way to easily build flexible electronic sensors and move toward practical applications.

关键词： flexible sensors intelligent sensing natural protein-rich material triboelectric nanogenerators

Non-Gaussian quantum states generated via quantum catalysis and their statistical properties

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Chinese physics B 2024年第4期33卷 332-337页

作者：张晓燕杨春燕王继锁孟祥国 Shandong Provincial Key Laboratory of Laser Polarization and information Technology School of Physics and Physical EngineeringQufu Normal UniversityQufu 273165China Shandong National Secondary Vocational school Qingzhou 262500China school of Basic Medical Sciences Weifang Medical UniversityWeifang 261000China

A new kind of non-Gaussian quantum catalyzed state is proposed via multiphoton measurements and two-mode squeezing as an input of thermal *** characteristics of the generated multiphoton catalysis output state depends on the thermal parameter,catalyzed photon number and squeezing *** then analyze the nonclassical properties by examining the photon number distribution,photocount distribution and partial negativity of the Wigner *** findings indicate that nonclassicality can be achieved through the implementation of multiphoton catalysis operations and modulated by the thermal parameter,catalyzed photon number and squeezing parameter.

关键词： two-mode squeezing multiphoton catalysis nonclassicality Wigner function