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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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    Photophysics of metal-organic frameworks:A brief overview

    刘晴硕余俊宏胡建波
    131-143页
    查看更多>>摘要：Metal-organic frameworks(MOFs),which are self-assembled porous coordination materials,have garnered consid-erable attention in the fields of optoelectronics,photovoltaic,photochemistry,and photocatalysis due to their diverse struc-tures and excellent tunability.However,the performance of MOF-based optoelectronic applications currently falls short of the industry benchmark.To enhance the performance of MOF materials,it is imperative to undertake comprehensive investigations aimed at gaining a deeper understanding of photophysics and sequentially optimizing properties related to photocarrier transport,recombination,interaction,and transfer.By utilizing femtosecond laser pulses to excite MOFs,time-resolved optical spectroscopy offers a means to observe and characterize these ultrafast microscopic processes.This approach adds the time coordinate as a novel dimension for comprehending the interaction between light and MOFs.Ac-cordingly,this review provides a comprehensive overview of the recent advancements in the photophysics of MOFs and additionally outlines potential avenues for exploring the time domain in the investigation of MOFs.
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    Universal basis underlying temperature,pressure and size induced dynamical evolution in metallic glass-forming liquids

    张华平范蓓蓓吴佳琦李茂枝...
    144-153页
    查看更多>>摘要：The dramatic temperature-dependence of liquids dynamics has attracted considerable scientific interests and efforts in the past decades,but the physics of which remains elusive.In addition to temperature,some other parameters,such as pressure,loading and size,can also tune the liquid dynamics and induce glass transition,which makes the situation more complicated.Here,we performed molecular dynamics simulations for Ni50Zr50 bulk liquid and nanodroplet to study the dynamics evolution in the complex multivariate phase space,especially along the isotherm with the change of pressure or droplet size.It is found that the short-time Debye-Waller factor universally determines the long-time relaxation dynamics no matter how the temperature,pressure or size changes.The basic correlation even holds at the local atomic scale.This finding provides general understanding of the microscopic mechanism of dynamic arrest and dynamic heterogeneity.
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    Anelasticity to plasticity transition in a model two-dimensional amorphous solid

    尚宝双
    154-159页
    查看更多>>摘要：Anelasticity,as an intrinsic property of amorphous solids,plays a significant role in understanding their relaxation and deformation mechanism.However,due to the lack of long-range order in amorphous solids,the structural origin of anelasticity and its distinction from plasticity remain elusive.In this work,using frozen matrix method,we study the transition from anelasticity to plasticity in a two-dimensional model glass.Three distinct mechanical behaviors,namely,elasticity,anelasticity,and plasticity,are identified with control parameters in the amorphous solid.Through the study of finite size effects on these mechanical behaviors,it is revealed that anelasticity can be distinguished from plasticity.Anelasticity serves as an intrinsic bridge connecting the elasticity and plasticity of amorphous solids.Additionally,it is observed that anelastic events are localized,while plastic events are subextensive.The transition from anelasticity to plasticity is found to resemble the entanglement of long-range interactions between element excitations.This study sheds light on the fundamental nature of anelasticity as a key property of element excitations in amorphous solids.
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    Ultrafast dynamics in photo-excited Mott insulator Sr3Ir2O7 at high pressure

    尹霞张建波王东Takeshi Nakagawa...
    160-167页
    查看更多>>摘要：High-pressure ultrafast dynamics,as a new crossed research direction,are sensitive to subtle non-equilibrium state changes that might be unresolved by equilibrium states measurements,providing crucial information for studying delicate phase transitions caused by complex interactions in Mott insulators.With time-resolved transient reflectivity measurements,we identified the new phases in the spin-orbit Mott insulator Sr3Ir2O7 at 300 K that was previously unidentified using conventional approaches such as x-ray diffraction.Significant pressure-dependent variation of the amplitude and lifetime obtained by fitting the reflectivity △R/R reveal the changes of electronic structure caused by lattice distortions,and reflect the critical phenomena of phase transitions.Our findings demonstrate the importance of ultrafast nonequilibrium dynamics under extreme conditions for understanding the phase transition of Mott insulators.
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    Ab initio nonadiabatic molecular dynamics study on spin-orbit coupling induced spin dynamics in ferromagnetic metals

    朱万松郑镇法郑奇靖赵瑾...
    168-176页
    查看更多>>摘要：Understanding the photoexcitation induced spin dynamics in ferromagnetic metals is important for the design of photo-controlled ultrafast spintronic device.In this work,by the ab initio nonadiabatic molecular dynamics simulation,we have studied the spin dynamics induced by spin-orbit coupling(SOC)in Co and Fe using both spin-diabatic and spin-adiabatic representations.In Co system,it is found that the Fermi surface(EF)is predominantly contributed by the spin-minority states.The SOC induced spin flip will occur for the photo-excited spin-majority electrons as they relax to the EF,and the spin-minority electrons tend to relax to the EF with the same spin through the electron-phonon coupling(EPC).The reduction of spin-majority electrons and the increase of spin-minority electrons lead to demagnetization of Co within 100 fs.By contrast,in Fe system,the EF is dominated by the spin-majority states.In this case,the SOC induced spin flip occurs for the photo-excited spin-minority electrons,which leads to a magnetization enhancement.If we move the EF of Fe to higher energy by 0.6 eV,the EF will be contributed by the spin-minority states and the demagnetization will be observed again.This work provides a new perspective for understanding the SOC induced spin dynamics mechanism in magnetic metal systems.
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    Ultrafast carrier dynamics in GeSn thin film based on time-resolved terahertz spectroscopy

    黄盼盼张有禄胡凯齐静波...
    177-183页
    查看更多>>摘要：We measure the time-resolved terahertz spectroscopy of GeSn thin film and studied the ultrafast dynamics of its photo-generated carriers.The experimental results show that there are photo-generated carriers in GeSn under femtosec-ond laser excitation at 2500 nm,and its pump-induced photoconductivity can be explained by the Drude-Smith model.The carrier recombination process is mainly dominated by defect-assisted Auger processes and defect capture.The first-and second-order recombination rates are obtained by the rate equation fitting,which are(2.6±1.1)×10-2 ps-1 and(6.6±1.8)×10-19 cm3·ps-1,respectively.Meanwhile,we also obtain the diffusion length of photo-generated carriers in GeSn,which is about 0.4 μm,and it changes with the pump delay time.These results are important for the GeSn-based infrared optoelectronic devices,and demonstrate that GeSn materials can be applied to high-speed optoelectronic detectors and other applications.
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    Optical manipulation of the topological phase in ZrTe5 revealed by time-and angle-resolved photoemission

    黄超之徐骋洋朱锋锋段绍峰...
    184-190页
    查看更多>>摘要：High-resolution time-and angle-resolved photoemission measurements were conducted on the topological insulator ZrTe5.With strong femtosecond photoexcitation,a possible ultrafast phase transition from a weak to a strong topological insulating phase was experimentally realized by recovering the energy gap inversion in a time scale that was shorter than 0.15 ps.This photoinduced transient strong topological phase can last longer than 2 ps at the highest excitation fluence studied,and it cannot be attributed to the photoinduced heating of electrons or modification of the conduction band filling.Additionally,the measured unoccupied electronic states are consistent with the first-principles calculation based on experi-mental crystal lattice constants,which favor a strong topological insulating phase.These findings provide new insights into the longstanding controversy about the strong and weak topological properties in ZrTe5,and they suggest that many-body effects including electron-electron interactions must be taken into account to understand the equilibrium weak topological insulating phase in ZrTe5.
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    Core-level spectroscopy of the photodissociation process of BrCN molecule

    周坤王涵
    191-198页
    查看更多>>摘要：Fewest-switches surfacing hopping(FSSH)simulations have been performed with the high-level multi-reference elec-tronic structure method to explore the coupled electronic and nuclear dynamics upon photoexcitation of cyanogen bromide(BrCN).The potential energy surfaces(PES)of BrCN are charted as functions of the Jacobi coordinates(R,θ).An in-depth examination of the FSSH trajectories reveals the temporal dynamics of the molecule and the population changes of the lowest twelve states during BrCN's photodissociation process,which presents a rich tapestry of dynamical information.Furthermore,the carbon K-edge x-ray absorption spectroscopy(XAS)is calculated with multi-reference inner-shell spec-tral simulations.The rotation of the CN fragment and the elongation of the C-Br bond are found to be the reason for the peak shifting in the XAS.Our findings offer a nuanced interpretation for inner-shell probe investigations of BrCN,setting the stage for a deeper understanding of the photodissociation process of cyanogen halides molecules.
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    A step to the decentralized real-time timekeeping network

    王芳敏陈雨锋周建华蔺玉亭...
    199-208页
    查看更多>>摘要：The composite time scale(CTS)provides an accurate and stable time-frequency reference for modern science and technology.Conventional CTS always features a centralized network topology,which means that the CTS is accompanied by a local master clock.This largely restricts the stability and reliability of the CTS.We simulate the restriction and analyze the influence of the master clock on the CTS.It proves that the CTS's long-term stability is also positively related to that of the master clock,until the region dominated by the frequency drift of the H-maser(averaging time longer than～105 s).Aiming at this restriction,a real-time clock network is utilized.Based on the network,a real-time CTS referenced by a stable remote master clock is achieved.The experiment comparing two real-time CTSs referenced by a local and a remote master clock respectively reveals that under open-loop steering,the stability of the CTS is improved by referencing to a remote and more stable master clock instead of a local and less stable master clock.In this way,with the help of the proposed scheme,the CTS can be referenced to the most stable master clock within the network in real time,no matter whether it is local or remote,making democratic polycentric timekeeping possible.
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    Design and simulation of an accelerometer based on NV center spin-strain coupling

    季鲁敏赵立业王裕海
    209-216页
    查看更多>>摘要：The nitrogen-vacancy(NV)center quantum systems have emerged as versatile tools in the field of precision mea-surement because of their high sensitivity in spin state detection and miniaturization potential as solid-state platforms.In this paper,an acceleration sensing scheme based on NV spin-strain coupling is proposed,which can effectively eliminate the influence of the stray noise field introduced by traditional mechanical schemes.Through the finite element simula-tion,it is found that the measurement bandwidth of this ensemble NV spin system ranges from 3 kHz to hundreds of kHz with structure optimization.The required power is at the sub-μW level,corresponding to a noise-limited sensitivity of 6.7 × 10-5 g/√Hz.Compared with other types of accelerometers,this micro-sized diamond sensor proposed here has low power consumption,exquisite sensitivity,and integration potential.This research opens a fresh perspective to realize an accelerometer with appealing comprehensive performance applied in biomechanics and inertial measurement fields.
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