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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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    Nonlinear ion acoustic waves in multicomponent plasmas with nonthermal electrons-positron and bipolar ions

    林麦麦宋晨光陈富艳王明月...
    363-372页
    查看更多>>摘要：This paper studied the propagating characteristics of(2+1)-dimensional nonlinear ion acoustic waves in a multicom-ponent plasma with nonthermal electrons,positrons,and bipolar ions.The dispersion relations are initially explored by using the small amplitude wave's dispersion relation.Then,the Sagdeev potential method is employed to study large am-plitude ion acoustic waves.The analysis involves examining the system's phase diagram,Sagdeev potential function,and solitary wave solutions through numerical solution of an analytical process in order to investigate the propagation properties of nonlinear ion acoustic waves under various parameters.It is found that the propagation of nonlinear ion acoustic waves is subject to the influence of various physical parameters,including the ratio of number densities between the unperturbed positrons,electrons to positive ions,nonthermal parameters,the mass ratio of positive ions to negative ions,and the charge number ratio of negative ions to positive ions,the ratio of the electrons'temperature to positrons'temperature.In addition,the multicomponent plasma system has a compressive solitary waves with amplitude greater than zero or a rarefactive soli-tary waves with amplitude less than zero,in the meantime,compressive and rarefactive ion acoustic wave characteristics depend on the charge number ratio of negative ions to positive ions.
      原文链接:
    • 万方数据
    • 维普

    Suppression of the Kelvin-Helmholtz instability by coating in the double-cone ignition scheme

    谢元凯张成龙程翊真李英骏...
    373-381页
    查看更多>>摘要：In order to address the issue of gold mixing caused by the Kelvin-Helmholtz instability(KHI)in the double-cone ignition(DCI)scheme,we investigate the growth rate of the KHI at the bi-interface of the DCI scheme after applying a coating.This is done by solving the hydrodynamic equations for an ideal incompressible fluid using linear theory.Ultimately,it is discovered that applying a coating with a thickness slightly above h=0.5(λ+10 μm)and a density somewhat lower than that of the target layer can effectively reduce the growth rate of interfacial KHI.This work provides theoretical references for studying the bi-interface KHI in the DCI scheme.
      原文链接:
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    • 维普

    Differences in the acoustic characteristics of DC bias alternating arcs in argon,helium,and nitrogen

    李雨泰文清皓付洋洋邹晓兵...
    382-392页
    查看更多>>摘要：The acoustic effects of gas discharge plasma have received much attention.Previous studies have shown that cold plasma and thermal plasma have different principles of sound generation.In this paper,the differences in the acoustic characteristics of DC bias alternating arc plasma(thermal plasma)in different gas environments(argon,helium,and nitro-gen)are investigated by combining experiments and simulations.Many processes in industrial machining involve this arc plasma.It was found that the acoustic characteristics of the arcs of these three gases are significantly different.The two key parameters,electrical and thermal conductivity of the gas,determine the acoustic characteristics of the arc by influencing the electric power of the arc and the heat dissipation through the anode.At the same drive current,the nitrogen arc has the largest voltage drop and the helium arc has the highest electroacoustic conversion efficiency.This results in the acoustic pressure amplitude being helium,nitrogen,and argon in descending order.The research contributes to a deeper understand-ing of the vocalization mechanism of arc plasma and provides theoretical guidance on gas selection for arc acoustic wave applications.
      原文链接:
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    • 维普

    Correlation of microstructure and magnetic softness of Si-microalloying FeNiBCuSi nanocrystalline alloy revealed by nanoindentation

    汪本军刘文君刘莉王玉...
    393-402页
    查看更多>>摘要：Compared to the commercial soft-magnetic alloys,the high saturation magnetic flux density(Bs)and low coercivity(Hc)of post-developed novel nanocrystalline alloys tend to realize the miniaturization and lightweight of electronic prod-ucts,thus attracting great attention.In this work,we designed a new FeNiBCuSi formulation with a novel atomic ratio,and the microstructure evolution and magnetic softness were investigated.Microstructure analysis revealed that the amount of Si prompted the differential chemical fluctuations of Cu element,favoring the different nucleation and growth processes ofα-Fe nanocrystals.Furthermore,microstructural defects associated with chemical heterogeneities were unveiled using the Maxwell-Voigt model with two Kelvin units and one Maxwell unit based on creeping analysis by nanoindentation.The defect,with a long relaxation time in relaxation spectra,was more likely to induce the formation of crystal nuclei that ul-timately evolved into the α-Fe nanocrystals.As a result,Fe84Ni2B12.5Cu1Si0.5 alloy with refined uniform nanocrystalline microstructure exhibited excellent magnetic softness,including a high Bs of 1.79 T and very low He of 2.8 A/m.Our finding offers new insight into the influence of activated defects associated with chemical heterogeneities on the microstructures of nanocrystalline alloy with excellent magnetic softness.
      原文链接:
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    • 维普

    Upconversion photoluminescence of Er-doped Bi4Ti3O12 ceramics enhanced by vacancy clusters revealed by positron annihilation spectroscopy

    程慧茹李钰环潘子文刘建党...
    403-410页
    查看更多>>摘要：Doping of rare earth elements into Bi4Ti3O12 can significantly enhance the upconversion photoluminescence(UCPL)properties,but its structure-property relationship is still unclear.In this work,Er-doped bismuth titanate Bi4-xErxTi3O12(x=0,0.1,0.2,0.3,0.4,0.5)ceramics were synthesized via solid-state reaction method.The x-ray diffraction analysis confirmed the orthorhombic crystalline structure of the Bi4-xErxTi3O12 ceramics without any secondary phases.Exper-iments and calculations of positron annihilation spectroscopy were carried out to characterize their defect structure.The comparison between the experimental and calculated lifetime revealed that vacancy clusters were the main defects in the ceramics.The increase of the intensity of the second positron lifetime component(I2)of Bi3.5Er0.5Ti3O12 ceramics in-dicated the presence of a high concentration of vacancy clusters.The UCPL spectra showed the sudden enhanced UCPL performance in Bi3.7Er0.3Ti3O12 and Bi3.5Er0.5Ti3O12 ceramics,which were consistent with the variation of the second positron lifetime component(I2).These results indicate that the enhanced UCPL properties are influenced not only by the concentrations of rare earth ions but also by the concentration of vacancy clusters present within the ceramics.
      原文链接:
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    • NSTL
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    Ab initio study of phase stability,elastic anisotropy,and minimum thermal conductivity of MnB2 in different crystal structures

    王小凡王乙先王卓张宇轩...
    411-420页
    查看更多>>摘要：The phase stability,elastic anisotropy,and minimum thermal conductivity of MnB2 in different crystal structures have been investigated by first-principles calculations based on density functional theory.The results found that P63/mmc(hP6-MnB2),P6/mmm(hrP3-MnB2),Pmmn(oP6-MnB2),R(3)m(hR3-MnB2),Pnma(oP12-MnB2),and Immm(oI18-MnB2)all exhibit mechanical and dynamic stability under environmental conditions,and the sequence of phase stability was hP6＞hR3＞oP6＞oI18＞oP12＞hP3.In addition,Vickers hardness calculations indicated that hP6,hR3,oP6,and oI18 of MnB2 have potential as hard materials,while hP3 and oP 12 are not suitable as hard materials.Moreover,the elastic anisotropy of different MnB2 phases were also comprehensively investigated.It is found that the anisotropic order of bulk modulus is oP12＞hP3＞hP6＞hR3＞oI18＞oP6,while that of Young's modulus is oP12＞hR3＞hP6＞oP6＞hP3＞oI18.Furthermore,the minimum thermal conductivity of different MnB2 phases was evaluated by means of Clarke's and Cahill's models.The results suggested that these MnB2 diborides are all not suitable as thermal barrier coating materials.
      原文链接:
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    • 维普

    Molecular beam epitaxial growth and physical properties of AlN/GaN superlattices with an average 50％Al composition

    李思琦邵鹏飞梁潇陈松林...
    421-427页
    查看更多>>摘要：We report molecular beam epitaxial growth and electrical and ultraviolet light emitting properties of(AlN)m/(GaN)n superlattices(SLs),where m and n represent the numbers of monolayers.Clear satellite peaks observed in XRD 2θ-ω scans and TEM images evidence the formation of clear periodicity and atomically sharp interfaces.For(AlN)m/(GaN)n SLs with an average Al composition of 50％,we have obtained an electron density up to 4.48 × 1019 cm-3 and a resis-tivity of 0.002 Ω·cm,and a hole density of 1.83 ×1018 cm-3 with a resistivity of 3.722 Ω·cm,both at room temperature.Furthermore,the(AlN)m/(GaN)n SLs exhibit a blue shift for their photoluminescence peaks,from 403 nm to 318 nm as GaN is reduced from n=11 to n=4 MLs,reaching the challenging UVB wavelength range.The results demonstrate that the(AlN)m/(GaN)n SLs have the potential to enhance the conductivity and avoid the usual random alloy scattering of the high-Al-composition ternary AlGaN,making them promising functional components in both UVB emitter and AlGaN channel high electron mobility transistor applications.
      原文链接:
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    • 维普

    Janus monolayers Fe2SSeX2(X=Ga,In,and Tl):Robust nontrivial topology with high Chern number

    贾康董晓晶王培吉张昌文...
    428-435页
    查看更多>>摘要：High-performance quantum anomalous Hall(QAH)systems are crucial materials for exploring emerging quantum physics and magnetic topological phenomena.Inspired by layered FeSe materials with excellent superconducting proper-ties,the Janus monolayers Fe2SSeX2(X=Ga,In and T1)are built by the decoration of Ga,In and T1 atoms in monolayer Fe2SSe.In first-principles calculations,Fe2SSeX2 have stable structures and prefer ferromagnetic(FM)ordering,and can be considered as Weyl semimetals without spin-orbit coupling.For out-of-plane(OOP)magnetic anisotropy,large non-trivial gaps are opened and the Fe2SSeX2 are predicted to be large-gap QAH insulators with a high Chern number C=2,proved by two chiral edge states and Berry curvature.When the magnetization is flipped,the two chiral edge states can be simultaneously changed and C=-2 can be obtained,revealing the fascinating behavior of chiral spin-edge state locking.It is found that the QAH properties of Fe2SSeX2 are robust against strain.In particular,nontrivial topological quantum states can spontaneously appear for Fe2SSeGa2 and Fe2SSeIn2 because the orientations of the easy magnetic axis are adjusted from in-plane to OOP by the biaxial strain.Our studies provide excellent candidate systems to realize QAH properties with a high Chern number,and suggest more experimental explorations combining superconductivity and topology.
      原文链接:
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    Strain-modulated antiferromagnetic Chern insulator in NiOsC16 monolayer

    武斌李娜陈新莲纪维霄...
    436-442页
    查看更多>>摘要：Recently,Chern insulators in an antiferromagnetic(AFM)phase have been suggested theoretically and predicted in a few materials.However,the experimental observation of two-dimensional(2D)AFM quantum anomalous Hall effect is still a challenge to date.In this work,we propose that an AFM Chern insulator can be realized in a 2D monolayer of NiOsCl6 modulated by a compressive strain.Strain modulation is accessible experimentally and used widely in predicting and tuning topological nontrivial phases.With first-principles calculations,we have investigated the structural,magnetic,and electronic properties of NiOsCl6.Its stability has been confirmed through molecular dynamical simulations,elasticity constant,and phonon spectrum.It has a collinear AFM order,with opposite magnetic moments of 1.3 μB on each Ni/Os atom,respectively,and the Néel temperature is estimated to be 93 K.In the absence of strain,it functions as an AFM insulator with a direct gap with spin-orbital coupling included.Compressive strain will induce a transition from a normal insulator to a Chern insulator characterized by a Chern number C=1,with a band gap of about 30 meV.This transition is accompanied by a structural distortion.Remarkably,the Chern insulator phase persists within the 3％-10％compressive strain range,offering an alternative platform for the utilization of AFM materials in spintronic devices.
      原文链接:
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    Tuning the magnetocaloric and structural properties of La0.67Sr0.28Pr0.05Mn1-xCOxO3 refrigeration materials

    徐长吉姜心雨邹正光谢卓家...
    443-456页
    查看更多>>摘要：The structural,magnetic and magnetocaloric properties of perovskite manganites La0.67Sr0.28Pr0.05Mn1-xCoxO3(x=0.05,0.075 and 0.10)(LSPMCO)are investigated.LSPMCO crystallizes as a rhombohedral structure with R-3c space group.As the Co content increases,the cell volume expands,the Mn-O-Mn bond angle reduces and the length of the Mn-O bond increases.The samples show irregular submicron particles under a Zeiss scanning electron microscopy.The particle size becomes larger with increasing doping.The chemical composition of the samples is confirmed by x-ray photoelectron spectroscopy(XPS).The ferromagnetic(FM)to paramagnetic(PM)phase transition occurs near the Curie temperature(TC),and all transitions are second-order phase transitions(SMOPT)characterized by minimal thermal and magnetic hystereses.Critical behavior analysis indicates that the critical parameters of LSPMCO closely align with those predicted by the mean-field model.The Tc declines with Co doping and reaches near room temperature(302 K)at x=0.075.The maximum magnetic entropy change(-ΔSMmax)at x=0.05 is 4.27 J/kg·K,and the relative cooling power(RCP)peaks at 310.81 J/K.Therefore,the system holds significant potential for development as a magnetic refrigeration material,meriting further professional and objective evaluation.
      原文链接:
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    • NSTL
    • 万方数据