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中国物理B（英文版）
中国物理B（英文版）

欧阳钟灿

月刊

1674-1056

010-82649026 82649519

100080

北京603信箱

中国物理B（英文版）/Journal Chinese Physics　BCSCDCSTPCD北大核心EISCI
查看更多>>该刊与《物理学报》是中国物理学会主办的物理学英文和中文的综合性国际学术月刊。刊登物理学科领域中，国内外未曾公开发表的具有创新性的科学研究最新成果。内容包括物理学各领域的理论、实验技术及应用。两刊内容不重复。两刊以论文水平高、创新性强，发表速度快的特点，受到国内外物理学工作者的好评和关注。被国际著名的SCI等10种以上检索系统收录。曾多次被评为中国科学院优秀期刊一等奖，1999，2003，2005年荣获第一、第二和第三届国家期刊奖，2001年被国家新闻出版总署评为“中国期刊方阵”中的双高（高知名度、高学术水平）期刊。2001，2002，2003年两刊都评为百种中国杰出期刊。
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    Quantitative analysis of laser-generated ultrasonic wave characteristics and their correlation with grain size in poly crystalline materials

    徐兆文白雪马健万壮壮...
    533-551页
    查看更多>>摘要：Quantitative relationship between nanosecond pulsed laser parameters and the characteristics of laser-generated ul-trasonic waves in polycrystalline materials was evaluated.The high energy of the pulsed laser with a large irradiation spot simultaneously generated ultrasonic longitudinal and shear waves at the epicenter under the slight ablation regime.An optimized denoising technique based on wavelet thresholding and variational mode decomposition was applied to reduce noise in shear waves with a low signal-to-noise ratio.An approach for characterizing grain size was proposed using spectral central frequency ratio(SCFR)based on time-frequency analysis.The results demonstrate that the generation regime of ultrasonic waves is not solely determined by the laser power density;even at high power densities,a high energy with a large spot can generate an ultrasonic waveform dominated by the thermoelastic effect.This is ascribed to the intensification of the thermoelastic effect with the proportional increase in laser irradiation spot area for a given laser power density.Fur-thermore,both longitudinal and shear wave SCFRs are linearly related to grain size in polycrystalline materials;however,the shear wave SCFR is more sensitive to finer-grained materials.This study holds great significance for evaluating metal material properties using laser ultrasound.
      原文链接:
    • NETL
    • NSTL
    • 万方数据

    Single crystal growth and transport properties of narrow-bandgap semiconductor RhP2

    吴德胜郑萍雒建林
    552-557页
    查看更多>>摘要：We report the growth of high-quality single crystals of RhP2,and systematically study its structure and physical properties by transport,magnetism,and heat capacity measurements.Single-crystal x-ray diffraction reveals that RhP2 adopts a monoclinic structure with the cell parameters a=5.7347(10)Å,b=5.7804(11)Å,and c=5.8222(11)Å,space groupP21/c(No.14).The electrical resistivity p(T)measurements indicate that RhP2 exhibits narrow-bandgap behavior with the activation energies of 223.1 meV and 27.4 meV for two distinct regions,respectively.The temperature-dependent Hall effect measurements show electron domain transport behavior with a low charge carrier concentration.We find that RhP2 has a high mobility μe～210 cm2·V-1·s-1 with carrier concentrations ne～3.3×1018 cm-3 at 300 K with a narrow-bandgap feature.The high mobility μe reaches the maximum of approximately 340 cm2·V-1·s-1 with carrier concentrations ne～2 × 1018 cm-3 at 100 K.No magnetic phase transitions are observed from the susceptibility x(T)and specific heat Cp(T)measurements of RhP2.Our results not only provide effective potential as a material platform for studying exotic physical properties and electron band structures but also motivate further exploration of their potential photovoltaic and optoelectronic applications.
      原文链接:
    • NETL
    • NSTL
    • 万方数据

    Defect chemistry engineering of Ga-doped garnet electrolyte with high stability for solid-state lithium metal batteries

    陈思汗黎俊刘可可孙笑晨...
    558-566页
    查看更多>>摘要：Ga-doped Li7La3Zr2O12(Ga-LLZO)has long been considered as a promising garnet-type electrolyte candidate for all-solid-state lithium metal batteries(ASSLBs)due to its high room temperature ionic conductivity.However,the typical synthesis of Ga-LLZO is usually accompanied by the formation of undesired LiGaO2 impurity phase that causes severe instability of the electrolyte in contact with molten Li metal during half/full cell assembly.In this study,we show that by simply engineering the defect chemistry of Ga-LLZO,namely,the lithium deficiency level,LiGaO2 impurity phase is effectively inhibited in the final synthetic product.Consequently,defect chemistry engineered Ga-LLZO exhibits excellent electrochemical stability against lithium metal,while its high room temperature ionic conductivity(～1.9 × 10-3 S·cm-1)is well reserved.The assembled Li/Ga-LLZO/Li symmetric cell has a superior critical current density of 0.9 mA·cm-2,and cycles stably for 500 hours at a current density of 0.3 mA·cm-2.This research facilitates the potential commercial applications of high performance Ga-LLZO solid electrolytes in ASSLBs.
      原文链接:
    • NETL
    • NSTL
    • 万方数据

    Subtraction of liposome signals in cryo-EM structural determination of protein-liposome complexes

    李首卿李明王玉梅李雪明...
    567-576页
    查看更多>>摘要：Reconstituting membrane proteins in liposomes and determining their structure is a common method for determining membrane protein structures using single-particle cryo-electron microscopy(cryo-EM).However,the strong signal of li-posomes under cryo-EM imaging conditions often interferes with the structural determination of the embedded membrane proteins.Here,we propose a liposome signal subtraction method based on single-particle two-dimensional(2D)classifica-tion average images,aimed at enhancing the reconstruction resolution of membrane proteins.We analyzed the signal distri-bution characteristics of liposomes and proteins within the 2D classification average images of protein-liposome complexes in the frequency domain.Based on this analysis,we designed a method to subtract the liposome signals from the original particle images.After the subtraction,the accuracy of single-particle three-dimensional(3D)alignment was improved,enhancing the resolution of the final 3D reconstruction.We demonstrated this method using a PIEZO 1-proteoliposome dataset by improving the resolution of the PIEZO 1 protein.
      原文链接:
    • NETL
    • NSTL
    • 万方数据

    Tuning the diffusion constant to optimize the readout of positional information of spatial concentration patterns

    江嘉杰罗春雄刘峰
    577-585页
    查看更多>>摘要：Positional information encoded in spatial concentration patterns is crucial for the development of multicellular organ-isms.However,it is still unclear how such information is affected by the physically dissipative diffusion process.Here we study one-dimensional patterning systems with analytical derivation and numerical simulations.We find that the diffu-sion constant of the patterning molecules exhibits a nonmonotonic effect on the readout of the positional information from the concentration patterns.Specifically,there exists an optimal diffusion constant that maximizes the positional informa-tion.Moreover,we find that the energy dissipation due to the physical diffusion imposes a fundamental upper limit on the positional information.
      原文链接:
    • NETL
    • NSTL
    • 万方数据

    CRB:A new rumor blocking algorithm in online social networks based on competitive spreading model and influence maximization

    董晨徐桂琼孟蕾
    586-603页
    查看更多>>摘要：The virtuality and openness of online social platforms make networks a hotbed for the rapid propagation of various rumors.In order to block the outbreak of rumor,one of the most effective containment measures is spreading positive information to counterbalance the diffusion of rumor.The spreading mechanism of rumors and effective suppression strategies are significant and challenging research issues.Firstly,in order to simulate the dissemination of multiple types of information,we propose a competitive linear threshold model with state transition(CLTST)to describe the spreading process of rumor and anti-rumor in the same network.Subsequently,we put forward a community-based rumor blocking(CRB)algorithm based on influence maximization theory in social networks.Its crucial step is to identify a set of influential seeds that propagate anti-rumor information to other nodes,which includes community detection,selection of candidate anti-rumor seeds and generation of anti-rumor seed set.Under the CLTST model,the CRB algorithm has been compared with six state-of-the-art algorithms on nine online social networks to verify the performance.Experimental results show that the proposed model can better reflect the process of rumor propagation,and review the propagation mechanism of rumor and anti-rumor in online social networks.Moreover,the proposed CRB algorithm has better performance in weakening the rumor dissemination ability,which can select anti-rumor seeds in networks more accurately and achieve better performance in influence spread,sensitivity analysis,seeds distribution and running time.
      原文链接:
    • NETL
    • NSTL
    • 万方数据

    Influence of network structure on spreading dynamics via tie range

    李敏宋玉蓉宋波李汝琦...
    604-612页
    查看更多>>摘要：There are various phenomena of malicious information spreading in the real society,which cause many negative impacts on the society.In order to better control the spreading,it is crucial to reveal the influence of network structure on network spreading.Motifs,as fundamental structures within a network,play a significant role in spreading.Therefore,it is of interest to investigate the influence of the structural characteristics of basic network motifs on spreading dynamics.Considering the edges of the basic network motifs in an undirected network correspond to different tie ranges,two edge removal strategies are proposed,short ties priority removal strategy and long ties priority removal strategy.The tie range represents the second shortest path length between two connected nodes.The study focuses on analyzing how the proposed strategies impact network spreading and network structure,as well as examining the influence of network structure on network spreading.Our findings indicate that the long ties priority removal strategy is most effective in controlling network spreading,especially in terms of spread range and spread velocity.In terms of network structure,the clustering coefficient and the diameter of network also have an effect on the network spreading,and the triangular structure as an important motif structure effectively inhibits the spreading.
      原文链接:
    • NETL
    • NSTL
    • 万方数据

    Detecting the core of a network by the centralities of the nodes

    马佩杰任学藻朱军芳蒋艳群...
    613-620页
    查看更多>>摘要：Many networks exhibit the core/periphery structure.Core/periphery structure is a type of meso-scale structure that consists of densely connected core nodes and sparsely connected peripheral nodes.Core nodes tend to be well-connected,both among themselves and to peripheral nodes,which tend not to be well-connected to other nodes.In this brief report,we propose a new method to detect the core of a network by the centrality of each node.It is discovered that such nodes with non-negative centralities often consist in the core of the networks.The simulation is carried out on different real networks.The results are checked by the objective function.The checked results may show the effectiveness of the simulation results by the centralities of the nodes on the real networks.Furthermore,we discuss the characters of networks with the single core/periphery structure and point out the scope of the application of our method at the end of this paper.
      原文链接:
    • NETL
    • NSTL
    • 万方数据

    Three-dimensional crystal defect imaging by STEM depth sectioning

    Ryo IshikawaNaoya ShibataYuichi Ikuhara
    前插1,1-6页
    查看更多>>摘要：One of the major innovations awaiting in electron microscopy is full three-dimensional imaging at atomic resolution.Despite the success of aberration correction to deep sub-ångström lateral resolution,spatial resolution in depth is still far from atomic resolution.In scanning transmission electron microscopy(STEM),this poor depth resolution is due to the limitation of the illumination angle.To overcome this physical limitation,it is essential to implement a next-generation aberration corrector in STEM that can significantly improve the depth resolution.This review discusses the capability of depth sectioning for three-dimensional imaging combined with large-angle illumination STEM.Furthermore,the statisti-cal analysis approach remarkably improves the depth resolution,making it possible to achieve three-dimensional atomic resolution imaging at oxide surfaces.We will also discuss the future prospects of three-dimensional imaging at atomic resolution by STEM depth sectioning.
      原文链接:
    • NETL
    • NSTL
    • 万方数据