物理学报最新文献

{"title":"DIRECTIONAL MOTION OF CHARGED PARTICLES NEAR MEMBRANE","authors":"Zhou Hongwei, Ouyang Wenze, Xu Shenghua","doi":"10.7498/aps.72.20220567","DOIUrl":"https://doi.org/10.7498/aps.72.20220567","url":null,"abstract":"Membrane has widely applications in the field of filtration and separation, but due to the attraction or repulsion exerted by the membrane, the particles will experience directional motion. As a result, two totally opposite effects, particle enrichment and exclusion zone, take place in the vicinity of the membrane, and the underlying reason is still not clear. In the paper, colloidal particles with negative surface charge was used as a model substance, with the advantages of monitoring the particles concentration in a real time and in situ way, to investigate the influence of cellulose membrane to the movement of particles. The experimental results showed that particles enriched in the vicinity of the membrane. The diffusiophoresis effect originates from the tiny amount ions released by the film is the main reason of the directional movement of the charged particles. Based on the two mechanisms of diffusiophoresis and diffusion, we construct a model and make relevant numerical calculation, and the numerical results are qualitatively consistent with the experimental results. Moreover, in addition to the longitudinal motion of the particles towards the filter membrane, diffusio-osmotic flow and particles lateral diffusion also result in the migration of particles towards to the container wall, and further increase particles number near the wall.","PeriodicalId":6995,"journal":{"name":"物理学报","volume":"1 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91316303","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Biomedical Microwave-induced Thermoacoustic Imaging","authors":"Yu Wang, Huiming Zhang, Huan Qin","doi":"10.7498/aps.72.20230732","DOIUrl":"https://doi.org/10.7498/aps.72.20230732","url":null,"abstract":"Microwave Thermoacoustic Imaging (MTAI) is an exciting imaging technique rooted in the underlying principle of exploiting the distinct electrical properties of biological tissues. By harnessing short-pulsed microwaves as a stimulation source and leveraging their interaction with the human body, MTAI has paved the way for revolutionary advancements in medical imaging. When microwaves are absorbed by polar molecules and ions within the tissues, an ingenious thermoelastic effect gives rise to ultrasound waves. These ultrasound waves, brimming with invaluable pathological and physiological insights, propagate outward, carrying the essence of the biological tissue's composition and functionality. Through a meticulous collection of ultrasound signals from all directions surrounding the tissue, it becomes possible to reconstruct intricate internal structures and visualize the tissue's functional dynamics. MTAI excels in non-invasiveness, capable of delving several centimeters beneath the surface with a microscopic resolution on the order of micrometers. The magic lies in the transformative conversion of microwave energy into ultrasound waves, tapping into the tissue's hidden depths without causing harm. This groundbreaking imaging modality unlocks a realm of possibilities for acquiring profound insights into the intricate structures and functionality of deep-seated tissues. Furthermore, the inherent polarization characteristics of microwaves empower MTAI to capture additional dimensions of information, unraveling the intricate polarization properties and illuminating a richer understanding of the tissue's complexity. The immense potential of MTAI extends far and wide within the realm of medicine. It has already demonstrated remarkable achievements in non-invasively imaging brain structures, screening for breast tumors, visualizing arthritis in human joints, and detecting liver fat content. These accomplishments have laid a solid foundation, firmly establishing MTAI as a trailblazing medical imaging technique. This article offers a comprehensive and in-depth exploration of the physical principles underpinning MTAI, the sophisticated system devices involved, and the recent groundbreaking research breakthroughs. Moreover, it delves into the exciting prospects and challenges that lie ahead in the future development of MTAI. As the technology continues to progress by leaps and bounds, MTAI is poised to shatter barriers, ushering in a new era of unrivaled imaging quality and performance. This, in turn, will open the floodgates for transformative innovation and application in the realms of medical diagnosis and treatment. The anticipation is palpable as MTAI strives to make substantial contributions to the ever-evolving field of medical imaging, bestowing upon humanity more precise, reliable, and life-enhancing diagnostic capabilities.","PeriodicalId":6995,"journal":{"name":"物理学报","volume":"11 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91237546","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Tunable electronic structures and interface contact in graphene/C3N van der Waals heterostructures","authors":"Huang Min, Li ZhanHai, Cheng Fang","doi":"10.7498/aps.72.20230318","DOIUrl":"https://doi.org/10.7498/aps.72.20230318","url":null,"abstract":"Graphene-based van der Waals heterojunctions can not only modulate the electronic properties of graphene but also retain the superior properties of the original monolayer. In this paper, the structure, electrical contact types, electronic and optical properties of Graphene/C3N van der Waals heterojunctions are systematically investigated based on first-principles calculations. We find that there is a p-type Schottky contact of only 0.039 eV in the Graphene/C3N van der Waals heterojunctions at the equilibrium state. The external electric field can adjust the interface contact type, from p-type to n-type schottky contact, or from p-type schottky contact to ohmic contact. The vertical strain not only opens a nonnegligible band gap of 360 meV at the Dirac cone of Graphene in Graphene/C3N van der Waals heterojunctions, but also modulates the band gap of C3N in the heterojunctions. Moreover, both the doping type and concentration of the carrier can be effectively tuned by the applied electric field and the vertical strain. The increase in carrier concentration is more pronounced by the applied electric field. Compared with the pristine monolayer Graphene and monolayer C3N, the optical response range and the light absorption rate of Graphene/C3N van der Waals heterojunctions are enhanced. Main absorption peak in the spectrum up to 106 cm-1. These results not only provide valuable theoretical guidance for the design of Schottky-based Graphene/C3N van der Waals heterojunctions devices, but also further explore the potential of heterojunctions for further applications in optoelectronic nanodevices and field-effect transistor devices.","PeriodicalId":6995,"journal":{"name":"物理学报","volume":"84 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74567220","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Study on the mechanism of the interface evolution of dual-bubble coalescence driving micromotors in bulk phase","authors":"Wang Li-na, Chen Li, Sheng Min-Jia, Wang Lei-Lei, Cui Hai-Hang, Zheng Xu, Huang Min-Hua","doi":"10.7498/aps.72.20230608","DOIUrl":"https://doi.org/10.7498/aps.72.20230608","url":null,"abstract":"Self-propelled micromotors serve as a bridge between the microfluidic environments and macroscopic control. They have broad application prospects in targeted drug delivery, biosensors, and other fields. The high driving speed of bubble micromotors is an irreplaceable advantage in practical applications. Bubble micromotors convert chemical energy in ambient solutions into mechanical energy through asymmetric surface catalytic reactions to drive their own motion. The energy conversion rate of bubble driving is used as an indicator to evaluate the driving force. The Pt catalytic layer of a tubular micromotor is located on the inner wall of the microtube. Bubbles form inside the tube. It is released from one end of the microtubule into the solution and self driven by bubble rebound, with an energy conversion rate of ~10-10. The Janus microsphere motor near the gas-liquid interface utilizes the energy of the bubble coalesced with the interface to drive the microsphere, with an energy conversion rate of ~10-7. In sum, the tubular bubble motor is suitable for complex scenarios but has low energy conversion rate. The Janus microsphere motor driven by bubbles has high efficiency but is only suitable near the gas-liquid interface. This paper combines the advantages of driving tubular micromotors in bulk solution and Janus microsphere motors utilizing interface energy to efficiently drive, proposing a new method of dual bubble coalescence and driving Janus microsphere motors. In the experiment, a high-speed camera was used to record the ~100μs of dual bubble coalescence and the process of driving micromotors. Then we investigates the initial kinetic energy conversion rate of micro motors driven by bubble coalescence. Three sets of different bubble/particle size ratios of Rb/Rp<1, Rb/Rp≈1, Rb/Rp>1 were presented for their propulsion effects on microspheres. The initial kinetic energy conversion rate was defined to characterize the contribution of bubble coalescence process to microsphere driving. After simulations with the pseudo potential lattice Boltzmann method, the mechanism of bubble coalescence driving the motion of microspheres was revealed. It is clarified that the interface oscillation caused by bubble coalescence is the main reason driving the micromotor, and its energy conversion rate is between the rebound driving of the tubular micromotor and the one-bubble coalescence driving with the freesurface. The research results revealed the details of bubble coalescence at different time periods, and provided the effects of factors such as bubble particle size ratio on microsphere displacement and initial kinetic energy conversion rate. It confirmed the efficient driving mechanism of dual bubble coalescence and release of surface energy.","PeriodicalId":6995,"journal":{"name":"物理学报","volume":"87 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74570052","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Advance of lithium-rich cathode materials in all-solid-state lithium batteries","authors":"Yuan Yang, Naifang Hu, Yongcheng Jin, Jun Ma, Guanglei Cui","doi":"10.7498/aps.72.20230258","DOIUrl":"https://doi.org/10.7498/aps.72.20230258","url":null,"abstract":"The development of all-solid-state lithium batteries with high energy density, long cycle life, low cost and high safety is one of the important directions for the development of next-generation lithium-ion batteries. Lithium-rich cathode materials have been widely used in liquid lithium batteries for their higher discharge specific capacity (&gt; 250 mAh g-1) and energy density (&gt; 900 Wh kg-1), due to the synergistic redox of anions and cations, as well as their high thermal stability and low raw material cost. With the rapid development of high-performance lithium-rich cathode materials and solid-state electrolytes in all-solid-state lithium batteries, the application of lithium-rich cathode materials in all-solid-state lithium batteries is expected to break through to the target of 500 W h kg-1 energy density of lithium-ion batteries. In this review, we firstly elaborate the failure mechanism of lithium-rich cathode materials in all-solid-state lithium batteries. The poor electronic conductivity, irreversible redox reaction of anionic oxygen and structute transformation during the electrochemical cycling of lithium-rich cathode materials lead to the low initial coulomb efficiency, poor cycling stability and voltage decay. In addition, the high operating voltage of lithium-rich cathode materials (&gt; 4.5 V vs. Li/Li+) exposes the cathode/electrolyte to not only conventional interfacial chemical reactions, but the released oxygen also aggravates the interfacial electrochemical reactions, which put higher demands on the interfacial stability of the cathode/electrolyte. Therefore, the intrinsic characteristics of lithium-rich cathode materials and the severe interfacial reaction of lithium-rich cathode/electrolyte greatly limit the application of lithium-rich cathode materials in all-solid-state lithium batteries. Then, we review the research progress of lithium-rich cathode materials in various solid-state electrolyte systems in recent years. The higher room temperature ionic conductivity and wider voltage window of inorganic solid-state electrolytes provide opportunities for the application of lithium-rich cathode materials in all-solid-state lithium batteries. At present, the application of lithium-rich cathode materials in all-solid-state lithium batteries has been initially explored on the basis of sulfide, halide and oxide solid-state electrolyte systems, and important progress has been made in studies including composite cathode preparation methods, interfacial reaction mechanisms and activation mechanisms. Finally, we summarize the current research focus of lithium-rich cathode all-solid-state lithium batteries and propose several strategies for their future outlook. Strategies such as the regulation of cathode material components, the construction of lithium ion and electron transport pathways within the composite cathode, and the interfacial modification of cathode materials have been shown to have significant effects in solving the failure p","PeriodicalId":6995,"journal":{"name":"物理学报","volume":"80 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74667346","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Carrier Transport Model of Non-carrier-injection LED","authors":"Zhao Jian-Cheng, Wu Chao-Xing, Guo Tai-Liang","doi":"10.7498/aps.72.20221831","DOIUrl":"https://doi.org/10.7498/aps.72.20221831","url":null,"abstract":"Non-carrier-injection light-emitting diodes (NCI-LEDs) are expected to be widely used in next generation micro-display technologies, including Micro-LEDs and nano-pixel light-emitting displays due to their simple device structure. However, because there is no charge carrier injection from external electrodes, carrier transport behavior of the NCI-LED cannot be described by using the traditional PN junction and LED theory. Therefore, establishing a carrier-transport model for the NCI-LED is of great significance for understanding its working mechanism and for improving device performance. In this paper, carrier transport mathematical model of the NCI-LED is established and the mechanical behavior of charge-carrier transport is analyzed quantitatively. Based on the mathematical model, the working mechanism of the NCI-LED is explained, the carrier transport characteristics of the device are obtained. Additionally, the key features, including the length of the induced charge region, the forward biased voltage across the internal PN junction, and the reverse biased voltage across the internal PN junction are studied. Their relationships with the applied frequency of the applied driving voltage are revealed. It is found that both the forward and reverse biases of the internal PN junction increase with the driving frequency. When the driving frequency reaches a certain value, the forward and reverse bias of the PN junction would be maintained at a maximum value. Moreover, the length of the induced charge region decreases with the increase of the driving frequency, and when the frequency reaches a certain value, the induced charge region would always be in the state of exhaustion. According to the mathematical model, suggestions for the device optimization design are provided: (1) Reducing the doping concentration of the induced charge regions can effectively increase the voltage drop across the internal LED; (2) Employing the tunneling effect occurring in the reverse-biased PN junction can effectively improve the electroluminescence intensity; (3) Using square-wave driving voltage can obtain a larger voltage drop across the internal LED and increase the electroluminescence intensity. This work on the carrier transport model is expected to provide a clear physical image for understanding the working mechanism of NCI-LED, and to provide a theoretical guidance for optimizing the device structure.","PeriodicalId":6995,"journal":{"name":"物理学报","volume":"20 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74763898","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Near-field control of gold nanostructure by the interaction of SPP and incident light","authors":"Wang Yue, Wang Lun, Sun Baixun, Lang Peng, Xu Yang, Zhao Zhenlong, Song Xiaowei, Ji Boyu, Lin Jingquan","doi":"10.7498/aps.72.20230514","DOIUrl":"https://doi.org/10.7498/aps.72.20230514","url":null,"abstract":"Localized Surface Plasmon (LSP) in nanostructure excited by Surface Plasmon Polariton (SPP) corresponds to stronger near-field enhancement and special spectral and dynamic responses that provides a new path to explore the interaction between light and matter. Meanwhile, this scheme can also release the signal background noise and structural thermal effect, and improve the performance of plasmonic components and sensing detectors based on LSP. However, the current research on this aspect is still insufficient. In this paper, we investigated the near-field characteristics of a plasmon composite structure composed of plasmon focusing lens and gold nanorod under the excitation of dual-beam using Finite-Difference Time-Domain (FDTD) method. The result shows that the near-field intensity control on the upper surface and in the gap position of the nanorod can be achieved by adjusting the relative time delay between the first light beam (used to excite SPP) and the second light beam (used to excite LSP). Specifically, the maximum adjustment range of the near-field intensity corresponding to 770 nm resonant mode in the gap position is about 23, and the adjustment period is about 2.4 fs. In a resonant mode dominated by SPP at a wavelength of 999 nm, the near-field intensity adjustment range is as small as 6, and the adjustment period is about 4 fs. On the upper surface of the structure, the adjustment range of the near-field intensity of the two resonant modes (719 nm and 802 nm) is basically the same (about 15), and the adjustment period is 2.4 fs and 2.8 fs. The achievement of the near field control is attributed to the coherent superposition of SPP-excited LSP with light-excited LSP. In addition, the dephasing time of the coupling field was investigated using quasi- normal mode. It is found that the nanorod structure will correspond to different dephasing time under different relative time delay between two excitation light beams. Specifically, for the time delay of 0.72 fs (Δt=0.72 fs), the corresponding dephasing time for both modes is the same of 6.0 fs. For Δt=1.92 fs, the dephasing time of the longer-wavelength mode is 7.1 fs, and the one of the shorter-wavelength mode is 5.8 fs. We attribute the variation of the dephasing time to different coupling strength between the two modes at different delay times. This study may further promote the application of plasmons in the fields of surface-enhanced Raman scattering and plasmon assisted catalysis.","PeriodicalId":6995,"journal":{"name":"物理学报","volume":"16 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74771382","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Quantum nonlocality testing of the “X” state based on the CHSH inequality in Markov Environment","authors":"Zeng Bai-yun, Gu Peng-yu, Jiang Shi-min, Jia Xin-Yan, Fan Dai-He","doi":"10.7498/aps.72.20222218","DOIUrl":"https://doi.org/10.7498/aps.72.20222218","url":null,"abstract":"Quantum nonlocality is one of the most fundamental characteristics of quantum theory. As a commonly used quantum state generated in experiments, the \"X\" state is a typical one in the research of open quantum systems, since it still maintains the stability of the \"X\" shape during the evolution. Using the Clauser-Horne-Harmony-Holt (CHSH) inequality, the quantum nonlocality testing of two \"X\" states associated with local transformation operations is studied under the Markov environment. The results show that in the phase damping environment, the two \"X\" states have the same CHSH inequality testing results with the increasing of the evolution time. Moreover, the maximum of quantum nonlocality test of the two \"X\" states will decrease nonlinearly. When 0.78<<i>F<1, the maximum value Sm of testing quantum nonlocality will gradually transition from Sm>2 to Sm<2 with the increasing of the evolution time of the two \"X\" states, and the research on the quantum nonlocality test cannot be successfully carried out. In the amplitude damping environment, using the \"X\" state obtained by the local transformation operation have a longer evolution time for the successfully quantum nonlocality testing when F>1. In particular, when F=1, the \"X\" state with the density matrix $rho _W$ cannot successfully perform the quantum nonlocality testing after the evolution time $Gamma t > 0.22$. For the \"X\" state with density matrix ${tilde rho _W}$, the quantum nonlocality testing cannot be performed until the evolution time $Gamma t > 0.26$. This results show that the local transformation operation of the \"X\" state is more conducive to the quantum nonlocality testing based on the CHSH inequality. Finally, the fidelity ranges of successfully testing the quantum nonlocality of the two \"X\" states in phase and amplitude damping environments are given in detail. The results show that, on the premise of quantum nonlocality testing successfully, the two types of \"X\" states evolving in the phase damping environment have the large range of valid fidelity. Meanwhile, at the same evolution time, the local transformation operation is helpful to improve the fidelity range of quantum nonlocality test in amplitude damping environment for \"X\" state with density matrix ${rho _W}$.","PeriodicalId":6995,"journal":{"name":"物理学报","volume":"3 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78427664","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nonlinear Topological Pumping in Momentum Space Lattice of Ultracold atoms","authors":"Yuan Tao, Dai Han-Ning, Chen Yu-Ao","doi":"10.7498/aps.72.20230740","DOIUrl":"https://doi.org/10.7498/aps.72.20230740","url":null,"abstract":"Topological pumping enables the quantized transport of matter waves through an adiabatic evolution of the system, which plays an essential role in the applications of transferring quantum states and exploring the topological properties in higher-dimensional quantum systems. Recently, exploring the interplay between novel topological pumping and interactions has attracted growing attention in topological systems, such as nonlinear topological pumping induced by interactions. So far, the experimental realizations of the nonlinear topological pumps have been realized only in the optical waveguide systems with Kerr nonlinearity. It is still necessary to further explore the phenomenon in different systems. Here, we present an experimental proposal for realizing the nonlinear topological pumping via a one-dimensional (1D) off-diagonal Aubry-André-Harper (AAH) model with mean-field interactions in the momentum space lattice of ultracold atoms. In particular, we develop a numerical method for calculating the energy band of the nonlinear systems. With numerical calculations, we first solve the nonlinear energy band structure and soliton solution of the 1D nonlinear off-diagonal AAH model in the region of weak interaction strengths. The result shows that the lowest or the highest energy band is modulated in the nonlinear system of g>0 or g<0, respectively. The eigenstates of the associated energy bands have the features of the soliton solutions. We then show that the topological pumping of solitons exhibits quantized transport characteristics. Moreover, we numerically calculate the Chern number associated with the lowest and highest energy bands at different interaction strengths. The result shows that the quantized transport of solitons is determined by the Chern number of the associated energy band of the system from which solitons emanate. Finally, we propose a nonlinear topological pumping scheme based on a momentum lattice experimental system with 7Li atoms. We can prepare the initial state, which is approximately the distribution of the soliton state of the lowest energy band, and calculate the dynamical evolution of this initial state in the case of U>0. Also, we analyzethe influence of adiabatic evolution conditions on the pumping process, demonstrating the feasibility of nonlinear topological pumping in the momentum lattice system. Our study provides a feasible route for investigating nonlinear topological pumping in ultracold atom systems, which is helpful for further exploring the topological transport in nonlinear systems, such as topological phase transitions and edge effects induced by nonlinearity.","PeriodicalId":6995,"journal":{"name":"物理学报","volume":"67 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79098122","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Calculation of thermodynamic properties and transport coefficients of Ar-C-Si Plasma","authors":"Zhu Cheng, Chen Xian-Hui, Wang Cheng, Song, Ming, Xia Wei-dong","doi":"10.7498/aps.72.20222390","DOIUrl":"https://doi.org/10.7498/aps.72.20222390","url":null,"abstract":"In this paper, the composition, thermodynamic properties and transport coefficients of the argon-carbon-silicon plasma at local thermodynamic equilibrium(LTE) and local chemical equilibrium(LCE) for a wide range of temperatures (300 K – 30000 K) and pressures (0.1 atm - 10 atm) and different mixture ratios are presented. The condensed phases and Debye–Hückel corrections are both taken into account. The equilibrium component in gas phase is calculated by mass action law (Saha’s law and Gulberg–Waage’s law), Dalton's partial pressure law, conservation of the elements and charge quasi-neutral equation, while the condensed species is calculated by the local phase equilibrium assumption. Thermodynamic properties include density, enthalpy and specific heat are evaluated through a classical statistical mechanics approach. Transport coefficient calculations include viscosity, electrical conductivity, and thermal conductivity using a third-order approximation (second-order for viscosity) of the Chapman-Enskog method. Collision integrals are obtained using the relatively new data. The results show that the concentration and ratio of CSi vapor has a great influence on the properties of the Ar plasma by introducing not only the CSi vapor’ s own properties, but also new reactions. While the pressure influence those properties by the shift of chemical equilibrium and the changes of total number density. In addition, the introduction of condensed species makes the thermodynamic properties and transport coefficients of the lower temperature plasma are almost the same as those of pure argon, and causes discontinuous points at phase-transition temperature. The final calculation results are in good agreement with the literature comparison, and the difference is due to the different use of collision integral. The results are expected to provide reliable basic data for the numerical simulation of argon-carbon-silicon plasma.","PeriodicalId":6995,"journal":{"name":"物理学报","volume":"48 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81610229","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}