Chinese Journal of Physics最新文献

{"title":"On hydromagnetic two-phase gas-liquid flow in ciliary channel: An application of a metachronal rhythm","authors":"G. Fatima ,&nbsp;Ambreen A Khan ,&nbsp;R. Ellahi ,&nbsp;Sadiq M. Sait","doi":"10.1016/j.cjph.2024.11.003","DOIUrl":"10.1016/j.cjph.2024.11.003","url":null,"abstract":"<div><div>The study of two-phase flows, encompassing gas-liquid plays a pivotal role in various industrial and biomedical applications. It investigates the behavior of an annular two-phase flow within ciliary channels, separated by compressible and incompressible flow regimes, in the presence of a magnetic field. The compressible flow is confined in the core region surrounded by the liquid phase. To analyze the flow characteristics, continuity, and momentum equations are considered for both phases. The compressible phase involves significant changes in density, requiring consideration of compressibility effects and the equation of state. Velocity and stresses are assumed to be equal at the interface. The system of mathematical equations is solved analytically by using the regular perturbation technique. The behavior of each phase with the input parameters is described thoroughly. The magnetic parameter is found to decrease while the Reynolds number increases for the velocity profile. The study's outcomes can contribute to the advancement of multiphase flow research by offering a versatile platform for innovation in biomedical engineering, with a thorough examination of the intricate relationship between ciliary motion, compressible and incompressible fluids, and MHD effects in ciliary channels.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"92 ","pages":"Pages 1435-1446"},"PeriodicalIF":4.6,"publicationDate":"2024-11-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142719953","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"A two-dimensional TaGe2P4–WSi2As4 van der Waals heterojunction: A near-ideal rectifier","authors":"Wei-Kang Zhang,&nbsp;Yue-Hong Liu,&nbsp;Hang He,&nbsp;Guang-Ping Zhang,&nbsp;Zong-Liang Li,&nbsp;Chuan-Kui Wang,&nbsp;Xiao-Xiao Fu","doi":"10.1016/j.cjph.2024.10.038","DOIUrl":"10.1016/j.cjph.2024.10.038","url":null,"abstract":"<div><div>Searching for suitable 2D metal-semiconductor interfaces to design high-performance Schottky diodes is essential for the continuous miniaturization of devices. Herein, by using the first-principles calculations, we propose a near-ideal two-dimensional van der Waals rectifier consisting of the monolayer TaGe₂P₄ metal and the WSi₂As₄ semiconductor with ultra-clean interface and free dangling bonds. The van der Waals heterojunction has a p-type Schottky contact at both the vertical and lateral interfaces. The Schottky barriers lead to the asymmetry of electronic transport under the positive and negative bias voltages, thus resulting in a remarkable rectification behavior. The rectifying properties can be improved by regulating the length of the semiconductor and the overlapping region, and an ultra-high rectification ratio of 10⁷ is obtained at a low bias voltage. The origin of the rectification effect and the regulating mechanism are explained in terms of the projected local density of states, transmission eigenstates, potential drop, and transmission spectra. It is found that increasing the relative length of the semiconductive part in the device enlarges the width of the Schottky barrier, which largely reduces the reverse current dominated by the electron tunneling while little affects the positive current, and thus leads to a significant improvement in the rectification performance. These results suggest that the TaGe₂P₄–WSi₂As₄ van der Waals heterojunction has promising application as a near-ideal rectifier.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"92 ","pages":"Pages 1283-1292"},"PeriodicalIF":4.6,"publicationDate":"2024-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142719949","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Dynamical analysis and hardware verification of a new multistable memristive hyperchaotic map","authors":"Qiang Lai ,&nbsp;Chongkun Zhu ,&nbsp;Luigi Fortuna","doi":"10.1016/j.cjph.2024.10.031","DOIUrl":"10.1016/j.cjph.2024.10.031","url":null,"abstract":"<div><div>In this paper, a three-dimensional (3D) memristive hyperchaotic map is designed by coupling discrete memristor (DM). Structurally, the map features the existence of infinite fixed points. Based on the differential setting of parameters for various initial values, it can produce an infinite number of heterogeneous coexisting attractors or homogeneous coexisting attractors. Simultaneously, it can realize the attractors symmetric control. The numerical analysis and simulation results highlight its rich dynamical behaviors and excellent performance. A digital hardware platform based on a microcontroller is designed, clearly demonstrating the efficacy of the design through distinct visualization of attractors on an oscilloscope, providing tangible evidence of the successful hardware platform implementation.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"92 ","pages":"Pages 1207-1216"},"PeriodicalIF":4.6,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658490","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Ultrahigh quality factor cavity based on double dielectric nanocylinder metasurfaces","authors":"Seokhyeon Hong,&nbsp;Youngsoo Kim,&nbsp;Seung Hyeon Hong,&nbsp;Bokyung Kim,&nbsp;Soon-Hong Kwon","doi":"10.1016/j.cjph.2024.10.036","DOIUrl":"10.1016/j.cjph.2024.10.036","url":null,"abstract":"<div><div>An optical cavity with a high quality factor (Q-factor) is essential for a wide range of applications, including lasers, single-photon sources, optical filters, and sensors. A high Q-factor cavity can enhance the interaction between light and materials, thereby improving the performance of optical devices. The Fabry–Pérot (FP) cavity is a typical optical device capable of achieving a high Q-factor; however, it often relies on distributed Bragg reflectors, which increase the size of the optical device. In recent years, Mie scattering-based metasurfaces with high reflectivity have been studied as alternatives to distributed Bragg reflectors. We propose a scattering-based FP cavity consisting of two metasurface layers. In our structure, a FP cavity with high reflectivity is formed by back-forward scattering from a single dielectric cylinder array. Our findings show that the structure exhibits a Q-factor of 4.36 × 10¹⁰ when the period and gap size are 658.8 nm and 740 nm, respectively. This high Q-factor is maintained even with misalignment between the two layers. Additionally, we confirmed that a high Q-factor of 2.6 × 10⁶ appears in the low-index substrate structure, with the Q-factor increasing with the number of double cylinders in the finite structure. We also observed a strong directionality in the z-axis direction when examining the far field. We designed the dielectric FP cavity with a subwavelength thickness, is expected to significantly contribute to enhancing the Q-factors of various types of optical cavities.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"92 ","pages":"Pages 1133-1143"},"PeriodicalIF":4.6,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142657986","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Ultra-wideband terahertz absorber with switchable multiple modes based on graphene and vanadium dioxide metamaterials","authors":"Jiaqi Geng ,&nbsp;Xin-Hua Deng ,&nbsp;Zhipeng Xiong ,&nbsp;Jiapeng Gao ,&nbsp;Binbin Song ,&nbsp;Jiren Yuan","doi":"10.1016/j.cjph.2024.10.037","DOIUrl":"10.1016/j.cjph.2024.10.037","url":null,"abstract":"<div><div>This article proposes a dynamic switchable broadband absorber based on graphene and vanadium dioxide (VO₂). The temperature could adjust the conductivity of VO₂, and external voltage could alter the conductivity of graphene. Therefore, they can be used for broadband absorption that can be switched between low and high frequencies and for achieving coupled ultra-wideband absorption. When the Fermi level of graphene is 0.9e V and VO₂ is in a non-metallic state, the absorber can achieve absorption of over 90 % in the range of 2.55 THz-4.86 THz. When the Fermi level of graphene is 0.1e V and VO₂ is in a metallic state, the absorber can achieve absorption of over 90 % in the range of 4.30 THz-9.40 THz. When the Fermi level of graphene is 0.6e V and VO₂ is in a metallic state, the absorber can achieve absorption of over 90 % in the range of 2.32 THz-9.80 THz. The absorber only partially depends on the incident angle of the incident light, simulation results show that when the incident angle is below 50 degrees, more than 90 % of the absorption bandwidth changes less. The absorber has no relation to the polarization angle of the incident light, and can keep its original property at any polarization angle. This structure has potential applications in electromagnetic wave stealth devices, optical switches and filters.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"92 ","pages":"Pages 1312-1324"},"PeriodicalIF":4.6,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142719950","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"The role of temperature-dependent solubility in the stability of thermohaline convection within a Voigt-fluid layer","authors":"Sangamesh ,&nbsp;Ali J. Chamkha ,&nbsp;K.R. Raghunatha","doi":"10.1016/j.cjph.2024.10.035","DOIUrl":"10.1016/j.cjph.2024.10.035","url":null,"abstract":"<div><div>The study focuses on both linear and weakly nonlinear stability analyzes of thermohaline convection within a Voigt-fluid layer, considering the effects of temperature-dependent solubility. Analytical methods are employed to derive conditions for the onset of both stationary and oscillatory convection. The linear stability analysis is performed using normal mode analysis to explore how various physical parameters influence the initiation of convection. Notably, unlike Newtonian fluids, the Navier-Stokes-Voigt fluid suppresses the typical quasiperiodic bifurcation from a steady state. To gain deeper insight into the onset of convection, a weakly nonlinear stability analysis is conducted using a modified perturbation method, leading to the Ginzburg-Landau equation. This reveals the potential for subcritical instability, a phenomenon not fully captured by linear analysis alone. Additionally, the study examines how different physical parameters affect convective heat and mass transfer, with findings that align with previous studies in specific limiting cases.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"92 ","pages":"Pages 1293-1311"},"PeriodicalIF":4.6,"publicationDate":"2024-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142719945","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Systematic study of α-decay in neutron-deficient nuclei","authors":"M. Ismail,&nbsp;A. Adel,&nbsp;A.Y. Ellithi,&nbsp;M.A. Abbas","doi":"10.1016/j.cjph.2024.10.029","DOIUrl":"10.1016/j.cjph.2024.10.029","url":null,"abstract":"<div><div>The <span><math><mi>α</mi></math></span>-decay half-lives of 266 neutron-deficient nuclei in the 52 <span><math><mrow><mo>≤</mo><mi>Z</mi><mo>≤</mo></mrow></math></span> 118 range are calculated within the density-dependent cluster model. The realistic Michigan three-range Yukawa-Paris nucleon–nucleon interaction is used to calculate the <span><math><mi>α</mi></math></span>-core interaction potential within the double-folding model (DFM) context. In addition to the double-folding model, four analytical formulas are employed to compute the half-life time for the neutron-deficient nuclei. The obtained results from the five theoretical approaches are compared to the most recent experimental data. The calculated results from the DFM and the universal decay law (UDL) were in good agreement with the experimental data. A universal curve for <span><math><mi>α</mi></math></span>-decay of neutron-deficient nuclei has been analyzed, illustrating the correlation between the decimal logarithm of the experimental half-lives and the negative decimal logarithm of penetrability. We studied the variation of <span><math><mrow><msub><mrow><mo>log</mo></mrow><mrow><mn>10</mn></mrow></msub><mi>T</mi></mrow></math></span> with the neutron number of the daughter nuclei, <span><math><msub><mrow><mi>N</mi></mrow><mrow><mi>d</mi></mrow></msub></math></span>, for different neutron-deficient isotopes in the range 78 <span><math><mrow><mo>≤</mo><mi>Z</mi><mo>≤</mo></mrow></math></span> 92. We attempt to predict the neutron energy levels for each isotope from the behavior of <span><math><mrow><msub><mrow><mo>log</mo></mrow><mrow><mn>10</mn></mrow></msub><mi>T</mi></mrow></math></span> against <span><math><msub><mrow><mi>N</mi></mrow><mrow><mi>d</mi></mrow></msub></math></span>. Moreover, the impact of higher-multipolarity deformations, up to hexacontratetrapole, on the behavior of <span><math><mi>α</mi></math></span>-decay half-lives around the neutron shell closure <span><math><mrow><mi>N</mi><mo>=</mo><mn>126</mn></mrow></math></span> is investigated, both with and without including octupole deformation.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"92 ","pages":"Pages 1097-1120"},"PeriodicalIF":4.6,"publicationDate":"2024-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142657984","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Synchronization in multiplex neural networks with homeostatic structural plasticity","authors":"Xueyan Hu,&nbsp;Qianming Ding,&nbsp;Yong Wu,&nbsp;Ya Jia","doi":"10.1016/j.cjph.2024.10.017","DOIUrl":"10.1016/j.cjph.2024.10.017","url":null,"abstract":"<div><div>The brain has a hierarchical structure with multiple connection types, which is best represented by a multiplex network structure, namely a network composed of two or more different layers. In order to further explore the synchronization phenomenon in biological neural networks, a bi-layer neural network with homeostatic structural plasticity coupled by electrical synapses is constructed in this paper. In addition, this study introduces the synchronization factor and basin stability to measure the network synchronization and quantify the stability of the synchronization state, respectively. The results show that increasing the intra-layer coupling strength, average degree and rewiring frequency can lead to a higher and more stable synchronization network. Moreover, increasing the inter-layer coupling strength and the number of inter-layer connections can improve the synchronization and stability in bi-layer networks. In particular, larger inter-layer coupling strength leads to the sub-network synchronization and stability much better than in the corresponding isolated network, and the higher the degree of synchronization of another sub-network can promote the synchronization and stability of the sub-network more. This study may provide useful guidance for the study of physiological functions related to brain synchronization.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"92 ","pages":"Pages 946-958"},"PeriodicalIF":4.6,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142537674","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"(2+1)-dimensional Burgers equation with a Caputo fractional derivative: Lie symmetry analysis, optimal system, exact solutions and conservation laws","authors":"Yapeng Shi ,&nbsp;Yuqiang Feng ,&nbsp;Jicheng Yu ,&nbsp;Jun Jiang","doi":"10.1016/j.cjph.2024.10.026","DOIUrl":"10.1016/j.cjph.2024.10.026","url":null,"abstract":"<div><div>In this paper, the Lie group method is applied to analyze the (2+1)-dimensional Burgers equation with Caputo fractional derivative. The infinitesimal generators of the equation are investigated. Then, using the Lie point symmetry of the equation, a one-dimensional optimal system is constructed. Subsequently, within the framework of the optimal system, the equation is symmetrically simplified and the exact solutions of the original equation are determined using the invariant subspace method and the homogeneous balance method. In the process of simplifying the equation to a (1+1)-dimensional fractional differential equation, it is deliberately avoided to use complex Erdélyi-Kober fractional derivative operator. Instead, a simple transformation is utilized to obtain a low-dimensional fractional differential equation. Finally, based on the concept of nonlinear self-adjointness, the conservation laws of the fractional differential equation are obtained.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"92 ","pages":"Pages 1121-1132"},"PeriodicalIF":4.6,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142657988","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Resolving FLRW cosmology through effective equation of state in f(T) gravity","authors":"S.R. Bhoyar,&nbsp;Yash B. Ingole","doi":"10.1016/j.cjph.2024.10.016","DOIUrl":"10.1016/j.cjph.2024.10.016","url":null,"abstract":"<div><div>This article explores the cosmological scenario of the universe in the context of the <span><math><mrow><mi>f</mi><mrow><mo>(</mo><mi>T</mi><mo>)</mo></mrow></mrow></math></span> power law model, where <span><math><mi>T</mi></math></span> represents the torsion scalar. To obtain the deterministic solution of the field equations, we parameterized the effective equation-of-state (EoS) with two parameters <span><math><mi>m</mi></math></span> and <span><math><mi>k</mi></math></span> as suggested by A. Mukherjee in a flat FLRW environment. We impose constraints on the free parameters of the derived solution by utilizing MCMC analysis, assuming the <span><math><mrow><mi>C</mi><mi>C</mi><mo>,</mo><mi>P</mi><mi>a</mi><mi>n</mi><mi>t</mi><mi>h</mi><mi>e</mi><mi>o</mi><mi>n</mi><mo>+</mo><mi>S</mi><mi>H</mi><mn>0</mn><mi>E</mi><mi>S</mi></mrow></math></span>, and <span><math><mrow><mi>C</mi><mi>C</mi><mo>+</mo><mi>P</mi><mi>a</mi><mi>n</mi><mi>t</mi><mi>h</mi><mi>e</mi><mi>o</mi><mi>n</mi><mo>+</mo><mi>S</mi><mi>H</mi><mn>0</mn><mi>E</mi><mi>S</mi></mrow></math></span> as data samples. We explore the dynamics of cosmological parameters. The evolutionary profile of the deceleration parameter exhibits the transition to the accelerated phase. The effective EoS parameter indicates that the model remains in the quintessence era and gradually becomes the Einstein–de Sitter model. In addition, we explore the jerk, snap, and lerk parameters. Furthermore, the <span><math><mrow><mi>O</mi><mi>m</mi><mrow><mo>(</mo><mi>z</mi><mo>)</mo></mrow></mrow></math></span> diagnostic shows that the model has a consistent positive slope across the entire evolution, but soon resembles the standard <span><math><mi>Λ</mi></math></span>CDM model. Finally, we conclude that the power law model of the <span><math><mrow><mi>f</mi><mrow><mo>(</mo><mi>T</mi><mo>)</mo></mrow></mrow></math></span> gravity in the framework of the FLRW universe aligns more closely with the <span><math><mi>Λ</mi></math></span>CDM model for given observational data.</div></div>","PeriodicalId":10340,"journal":{"name":"Chinese Journal of Physics","volume":"92 ","pages":"Pages 1085-1096"},"PeriodicalIF":4.6,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142586113","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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}