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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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    Experimental studies of H2/Ar plasma in a cylindrical inductive discharge with an expansion region

    李世博邢思雨高飞王友年...
    362-372页
    查看更多>>摘要：The electrical parameters of H2/Ar plasma in a cylindrical inductive discharge with an expansion region are investi-gated by a Langmuir probe,where Ar fractions range from 0％to 100％.The influence of gas composition and pressure on electron density,the effective electron temperature and the electron energy probability functions(EEPFs)at different spatial positions are present.In driver region,with the introduction of a small amount of Ar at 0.3 Pa,there is a rapid increase in electron density accompanied by a decrease in the effective electron temperature.Additionally,the shape of the EEPF transitions from a three-temperature distribution to a bi-Maxwellian distribution due to an increase in electron-electron col-lision.However,this phenomenon resulting from the changes in gas composition vanishes at 5 Pa due to the prior depletion of energetic electrons caused by the increase in pressure during hydrogen discharge.The EEPFs for the total energy in expansion region is coincident to these in the driver region at 0.3 Pa,as do the patterns of electron density variation between these two regions for differing Ar fractions.At 5 Pa,as the discharge transitions from H2 to Ar,the EEPFs evolved from a bi-Maxwellian distribution with pronounced low energy electrons to a Maxwellian distribution in expansion region.This evolve may be attributed to a reduction in molecular vibrational excitation reactions of electrons during transport and the transition from localized electron dynamics in hydrogen discharge to non-localized electron dynamics in argon discharge.In order to validate the experimental results,we use the COMSOL simulation software to calculate electrical parameters under the same conditions.The evolution and spatial distribution of the electrical parameters of the simulation results agree well with the trend of the experimental results.
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    Effect of matrix thermal properties on laser-induced plasma

    单宇恒李安张新宇易文...
    373-379页
    查看更多>>摘要：The matrix thermal properties have an important impact on laser-induced plasma,as the thermal effect dominates the interaction between ns-pulsed laser and matter,especially in metals.We used a series of pure metals and aluminum alloys to measure plasma temperature and electron density through laser-induced breakdown spectroscopy,in order to investigate the effect of matrix thermal properties on laser-induced plasma.In pure metals,a significant negative linear correlation was observed between the matrix thermal storage coefficient and plasma temperature,while a weak correlation was observed with electron density.The results indicate that metals with low thermal conductivity or specific heat capacity require less laser energy for thermal diffusion or melting and evaporation,resulting in higher ablation rates and higher plasma temperatures.However,considering ionization energy,thermal effects may be a secondary factor affecting electron density.The experiment of aluminum alloy further confirms the influence of thermal conductivity on plasma temperature and its mechanism explanation.
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    Direct observation of shock-induced phase transformation in polycrystalline iron via in situ x-ray diffraction

    张帆董佳钦谢志勇贺芝宇...
    380-386页
    查看更多>>摘要：Phase transition of polycrystalline iron compressed along the Hugoniot is studied by combining laser-driven shock with in situ x-ray diffraction technique.It is suggested that polycrystalline iron changes from an initial body-centered cubic structure to a hexagonal close-packed structure with increasing pressure(i.e.,a phase transition from α to ε).The relationship between density and pressure for polycrystalline iron obtained from the present experiments is found to be in good agreement with the gas-gun Hugoniot data.Our results show that experiments with samples at lower temperatures under static loading,such as in a diamond anvil cell,lead to higher densities measured than those found under dynamic loading.This means that extrapolating results of static experiments may not predict the dynamic responses of materials accurately.In addition,neither the face-centered cubic structure seen in previous molecular-dynamics simulations or two-phase coexistence are found within our experimental pressure range.
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    Thermal conductivity of iron under the Earth's inner core pressure

    胡翠娥焦亩鑫杨学楠曾召益...
    387-393页
    查看更多>>摘要：The thermal conductivity of ε-iron at high pressure and high temperature is a key parameter to constrain the dynamics and thermal evolution of the Earth's core.In this work,we use first-principles calculations to study the Hugoniot sound velocity and the thermal transport properties of ε-iron.The total thermal conductivity considering lattice vibration is 200 W/mK at the Earth's inner core conditions.The suppressed anharmonic interactions can significantly enhance the lattice thermal conductivity under high pressure,and the contribution of the lattice thermal conductivity should not be ignored under the Earth's core conditions.
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    Optimized numerical density functional theory calculation of rotationally symmetric jellium model systems

    张广迪毛力徐红星
    394-401页
    查看更多>>摘要：In real space density functional theory calculations,the effective potential depends on the electron density,requiring self-consistent iterations,and numerous integrals at each step,making the process time-consuming.In our research,we propose an optimization method to expedite density functional theory(DFT)calculations for systems with large aspect ratios,such as metallic nanorods,nanowires,or scanning tunneling microscope tips.This method focuses on employing basis set to expand the electron density,Coulomb potential,and exchange-correlation potential.By precomputing integrals and caching redundant results,this expansion streamlines the integration process,significantly accelerating DFT computa-tions.As a case study,we have applied this optimization to metallic nanorod systems of various radii and lengths,obtaining corresponding ground-state electron densities and potentials.
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    The de Haas-van Alphen quantum oscillations in the kagome metal RbTi3Bi5

    董自仙石磊王彬霍梦五...
    402-408页
    查看更多>>摘要：The kagome system has attracted great interest in condensed matter physics due to its unique structure that can host various exotic states such as superconductivity(SC),charge density waves(CDWs)and nontrivial topological states.The topological semimetal RbTi3Bi5 consisting of a Ti kagome layer shares a similar crystal structure to the topological correlated materials AV3Sb5(A=K,Rb,Cs)but without the absence of CDW and SC.Systematic de Haas-van Alphen oscillation measurements are performed on single crystals of RbTi3Bi5 to pursue nontrivial topological physics and exotic states.Combining this with theoretical calculations,the detailed Fermi surface topology and band structure are investigated.A two-dimensional Fermi pocket β is revealed with a light effective mass,consistent with the semimetal predictions.The Landau fan diagram of RbTi3Bi5 reveals a zero Berry phase for the β oscillation in contrast to that of CsTi3Bi5.These results suggest that kagome RbTi3Bi5 is a good candidate for exploring nontrivial topological exotic states and topological correlated physics.
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    Phase induced localization transition

    刘通魏兴波王友国
    409-413页
    查看更多>>摘要：Localization phenomenon is an important research field in condensed matter physics.However,due to the complexity and subtlety of disordered systems,new localization phenomena always emerge unexpectedly.For example,it is generally believed that the phase of the hopping term does not affect the localization properties of the system,so the calculation of the phase is often ignored in the study of localization.Here,we introduce a quasiperiodic model and demonstrate that the phase change of the hopping term can significantly alter the localization properties of the system through detailed numerical simulations,such as the inverse participation ratio and multifractal analysis.This phase-induced localization transition provides valuable information for the study of localization physics.
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    Strain tunable excitonic optical properties in monolayer Ga2O3

    崔浩磊权真王舒东
    414-419页
    查看更多>>摘要：Two-dimensional(2D)Ga2O3 has been confirmed to be a stable structure with five atomic layer thickness configu-ration.In this work,we study the quasi-particle electronic band structures and then access the excitonic optical properties through solving the Bethe-Salpeter equation(BSE).The results reveal that the exciton dominates the optical absorption in the visible light region with the binding energy as large as～1.0 eV,which is highly stable at room temperature.Im-portantly,both the dominant absorption P1 and P2 peaks are optically bright without dark exciton between them,and thus is favorable for luminescence process.The calculated radiative lifetime of the lowest-energy exciton is 2.0x 10-11 s at 0 K.Furthermore,the radiative lifetime under+4％tensile strain is one order of magnitude shorter than that of the strain-free case,while it is less insensitive under the compressive strain.Our findings set the stage for future theoretical and experimental investigation on monolayer Ga2O3.
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    Excitonic optical properties in monolayer SnP2S6

    陈鹏远权真王舒东
    420-425页
    查看更多>>摘要：Quantum confinement effect and reduced dielectric screening in two-dimensional(2D)dramatically enhance the electron-hole interactions.In this work,we use many-body perturbation theory and Bethe-Salpeter equation(BSE)to investigate the electronic and excitonic optical properties of monolayer SnP2S6.Our findings reveal that the excitonic effect dominates the optical absorption spectra in the visible light range,and the lowest-energy exciton X0 in monolayer SnP2S6 is optically bright with the binding energy of 0.87 eV and the radiative lifetime of～10-11 s,which is highly ad-vantageous to the photo-luminescence.Most importantly,the absence of optically forbidden states below the bright states X0 would give rise to a high quantum efficiency of 2D SnP2S6.We also find that applied biaxial strain can further shorten the radiative lifetime of the bright states.These results imply that 2D SnP2S6 is a promising candidate for the optoelectronic devices.
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    Peak structure in the interlayer conductance of Moiré superlattices

    陶懿洲刘超肖明文方贺男...
    426-431页
    查看更多>>摘要：We investigate the peak structure in the interlayer conductance of Moiré superlattices using a tunneling theory we developed previously.The theoretical results predict that,due to the resonance of two different partial waves,the double-peak structure can appear in the curve of the interlayer conductance versus twist angle.Furthermore,we study the influences of the model parameters,i.e.,the chemical potential of electrodes,the thickness of Moiré superlattice,and the strength of interface potential,on the peak structure of the interlayer conductance.In particular,the parameter dependence of the peak structure is concluded via a phase diagram,and the physical meanings of the phase diagram is formulized.Finally,the potential applications of the present work is discussed.
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