物理最新文献

{"title":"Fracture failure behavior of Al2O3 fabric under the combined interaction of high-temperature heat flow and tensile load","authors":"Kai Guo,&nbsp;Zhenyu Zhang,&nbsp;Hongxiang Cao,&nbsp;Mengzhou Chang,&nbsp;Chuang Chen,&nbsp;Enling Tang","doi":"10.1140/epjp/s13360-024-05818-4","DOIUrl":"10.1140/epjp/s13360-024-05818-4","url":null,"abstract":"<div><p>The aircraft will be subjected to severe aerodynamic and thermal effects during the reentry of the spacecraft into the earth’s atmosphere. Flexible woven structure plays an important role in thermal protection of aircraft surface, and Al₂O₃ fiber fabric is an important candidate material in weaponry, aerospace and other fields, which puts forward higher requirements for the prediction of mechanical properties at high temperature. In this paper, the extreme environment faced by the thermal protection structure during the high-speed entry/reentry of spacecraft is simulated by using the self-built loading and testing system of oxygen–methane high-temperature heat flow and mechanical stretching. Based on the experimental data, the finite element model of Al₂O₃ fabric was constructed. Combined with the stress–strain relationship and physical parameters of the material, the fracture process of Al₂O₃ fiber fabric under the combined action of high-temperature heat flow and tensile load was simulated. The results show that due to the poor high-temperature stability of amorphous SiO₂ phase in Al₂O₃ fiber under high-temperature heat flow, the surface defects of the fiber surface increase due to hot corrosion, which reduces the mechanical properties of the fabric. The breaking strength, elongation at break, elastic modulus and strength limit of Al₂O₃ fabric at 1300 °C were 0.318 kN/cm, 9.108%, 319 MPa, 51.1 MPa (plain) and 0.412 kN/cm, 3.356%, 720 MPa, 58.44 MPa (twill), respectively. Due to the different forms of fabric structure, warp yarns exhibit varying degrees of buckling. Under the action of tensile load, the warp yarn is from buckling to straightening, so that the stress–strain relationship of Al₂O₃ fabric has nonlinear characteristics. The nonlinear Ogden model can well simulate the deformation process of Al₂O₃ fabric under high-temperature heat flow.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"139 12","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142844861","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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 laser field in the electron transport through serially coupled double-quantum dots","authors":"Majed A. Nattiq,&nbsp;Abadhar R. Ahmed,&nbsp;Jenan M. Al-Mukh","doi":"10.1140/epjb/s10051-024-00833-x","DOIUrl":"10.1140/epjb/s10051-024-00833-x","url":null,"abstract":"<div><p>In this study, a mathematical model is developed to study the transport properties of a system consisting of serially coupled double-quantum dots embedded between two nonmagnetic leads in the presence of a laser field effect on double-quantum dots. To examine the device properties and develop a spin-dependent analytical formula for the occupancy numbers, related quantum dot energy levels and the molecular virtual levels, the treatment in this research is based on the time-independent Anderson–Newns model. These formulas are solved self-consistently to compute the tunneling current which is utilized to calculate the differential conductance “Our calculations focus on the strong regime”. All the parameters that included in our calculations can be tuned experimentally. It is found that the electron transport through the system is enhanced as the frequency of the laser field increases, and the energy window is getting wider too. These results are very important to be applied to nano-devices, since the laser can be used as a tool to assist the transport of electrons through the system.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":787,"journal":{"name":"The European Physical Journal B","volume":"97 12","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142844922","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":"Prediction of thermodynamic function of three models interacting with a class of improved Pὂschl-Teller potential","authors":"Mohamed J. Saadh,&nbsp;Ameer H. Al-Rubaye,&nbsp;Sabrean Farhan Jawad,&nbsp;Junainah Abd Hamid,&nbsp;I. A. Ariffin,&nbsp;Ahmed Elawady,&nbsp;Mohamed Abbas,&nbsp;Shatrudhan Pandey,&nbsp;Rahadian Zainul","doi":"10.1140/epjp/s13360-024-05892-8","DOIUrl":"10.1140/epjp/s13360-024-05892-8","url":null,"abstract":"<div><p>This study adopts the improved model Pὂschl-Teller potential to examine the internal vibration of three diatomic molecules. The analytical expressions that predicted molar enthalpy, heat capacity and molar Gibbs free energy were obtained. Using the various molar predicted equations, numerical values for enthalpy, heat capacity and Gibbs free energy were generated for fluorine molecule, iodine molecule, chlorine molecule, phosphorus molecule and potassium molecule. A model equation to check the proximity of the predicted results to the experimental data was obtained. This equation was used to obtain the average absolute percentage deviation of the predicted result from the observed data recorded in National Institute of Standards and Technology data base. The results for all the molecules exhibit remarkable consistency with the observed data.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"139 12","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826181","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Corrosion inhibition assessment of the Curcumis melon extract on low-carbon steel in 0.5 M H2SO4 using potentiodynamic polarization, electrochemical impedance spectroscopy, scanning electron microscope, DFT and MD simulation studies","authors":"Hritik Jha,&nbsp;Akhil Saxena,&nbsp;Jasdeep Kaur,&nbsp;Konstantin P. Katin,&nbsp;Elyor Berdimurodov,&nbsp;Dakeshwar Kumar Verma,&nbsp;Farid S. Ataya","doi":"10.1140/epjp/s13360-024-05903-8","DOIUrl":"10.1140/epjp/s13360-024-05903-8","url":null,"abstract":"<div><p>This study mentions a unique use of the <i>Curcumis melon</i> extract via a green route to reduce steel corrosion through electrochemical and computational tests. The main components of the <i>Cucurmis melon</i> extract include oleic acid, saponins, and tannins. They have a significant impact on mild steel’s ability to resist corrosion in aggressive media. A range of techniques, including loss of steel coupon’s weight (WL), scanning electron microscopy (SEM), electrochemical impedance spectroscopy (EIS), potentiodynamic polarization (PDP), and molecular dynamic (MD) simulation, were used to investigate the suppression of corrosion on the steel in 0.5 M H₂SO₄. The maximum efficiency in 0.5 M H₂SO₄ was 92.4% at 2500 mgL⁻¹. The SEM investigation was carried out to verify the metal’s surface coverage. The hydroxyl group and aromatic rings, which raise the electron density in certain areas of the molecule, are what make the inhibitor effective, according to molecular studies. These areas have a higher electron density, which increases their probability of interacting with positively charged metal ions on the metal surface and contributing electrons.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"139 12","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826182","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"Fabrication process of ceramic capacitor derived from lead-free Bi0.5(Na0.8K0.2)0.5TiO3 bulk and powder synthesized via sol–gel method","authors":"Co Dang Nguyen,&nbsp;Viet Quoc Dong,&nbsp;Hung Duy Tran,&nbsp;Vu Quang Dinh,&nbsp;Lan Thi Nguyen,&nbsp;Vinh Huu Dang,&nbsp;Canh Tuan Nguyen,&nbsp;Giang Thi Huong Do,&nbsp;Long The Phan,&nbsp;Quan Duc Ngo,&nbsp;Thang Van Pham,&nbsp;Dung Duc Dang,&nbsp;Tu Dinh Bui,&nbsp;Thang Duc Pham","doi":"10.1007/s00339-024-08162-7","DOIUrl":"10.1007/s00339-024-08162-7","url":null,"abstract":"<div><p>This study presents a comprehensive fabrication process for dielectric ceramic capacitor derived from lead-free Bi_0.5(Na_0.8K_0.2)_0.5TiO₃ (BNKT) in bulk and powder form, synthesized by sol–gel method. Both the BNKT powder and the bulk ceramic were rigorously analyzed and compared for their crystal structure, morphology, magnetic and optical properties. Through XRD and Raman results, the structure in the form of morphological phase boundary (MPB) was detected. In addition, the morphological structure, grain size evolution and purity of the samples were also confirmed by SEM and EDX. The weak ferromagnetic property of the BNKT powder sample was replaced by the diamagnetic property of the bulk ceramic sample and a decrease in the band gap (<i>E</i>_g) from 3.33 eV to 3.13 eV was also observed in the corresponding samples. At room temperature, the dielectric constant (<i>ε</i>_r) of the bulk ceramic reached 2193 with a dielectric loss (tan<i>δ</i>) of 0.332 at 1 kHz. It also exhibits typical ferroelectric behavior with slim <i>P</i>–<i>E</i> loop, a recoverable energy density (<i>W</i>_rec) of 12.541 mJ/cm³, and a high energy storage efficiency (<i>η</i>) of 46.44% under a low electric field of 15 kV/cm. Furthermore, the charge–discharge properties of BNKT dielectric ceramic capacitor were also characterized by a time constant (<i>τ</i>) of 8.452 μs. With this simple production process, it is possible to expand large-scale production while still ensuring the quality of ceramic capacitors, contributing to the development of BNKT lead-free material applications in electronic devices.</p></div>","PeriodicalId":473,"journal":{"name":"Applied Physics A","volume":"131 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142844864","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Complex network analysis of transmission networks preparing for the energy transition: application to the current French power grid","authors":"Emile Emery,&nbsp;Hervé Bercegol,&nbsp;Nicolas Jonqueres,&nbsp;Sébastien Aumaître","doi":"10.1140/epjb/s10051-024-00837-7","DOIUrl":"10.1140/epjb/s10051-024-00837-7","url":null,"abstract":"<p> The worldwide process of replacing fossil fuels with low-carbon energy sources is underway. Existing energy networks are expected to be deeply modified in nature and structure during this transition. This work uses graph-theoretical statistical physics tools to analyze topology and structural changes of power grids, with the French grid as a case study. We discuss the small-world model to define an optimality criterion, the construction of a graph model for the French high-voltage transmission grid, and the development of a growth model to study the dynamics of such networks. The main result of our project suggests that the high efficiency level in the current French network is due to a high-voltage mesh interconnecting thermal power plants. Since implementing low-power-density renewable energy sources would imply non-trivial adjustments to maintain features, such as efficiency and robustness, these considerations must be added to economic and energetic assessments of transition scenarios.</p>","PeriodicalId":787,"journal":{"name":"The European Physical Journal B","volume":"97 12","pages":""},"PeriodicalIF":1.6,"publicationDate":"2024-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjb/s10051-024-00837-7.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142844817","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comprehensive investigation of (Ce3+, Eu3+) codoped LiCaBiB glasses: physical, structural, and photoluminescence analyses","authors":"A Madhu,&nbsp;M. Al-Dossari,&nbsp;Upendra Kumar Kagola,&nbsp;Basavaraj Angadi,&nbsp;N Srinatha","doi":"10.1007/s00339-024-08124-z","DOIUrl":"10.1007/s00339-024-08124-z","url":null,"abstract":"<div><p>Herein, we present the luminescence-emission properties of (Ce³⁺, Eu³⁺) doped Li₂O-CaO-Bi₂O₃-B₂O₃ glasses fabricated via melt-quenching. The density of glasses was found to increase from 3.551 to 3.655 g/cm³ with dopant concentration, owing to the formation of non-bridging oxygens, resulting in enhanced luminescence by facilitating radiative transitions of Eu³⁺-ions. On the other hand, slight decreases in molar volume, refractivity, polarizability, optical basicity, and electronic polarizability suggest a more localised charge distribution and reduced polarizability. nevertheless, the stability in reflection loss, dielectric constant, and transmission coefficient indicates consistent optical quality and stable glass material. Raman analysis reveals the structural changes induced by the dopants due to Bi-O bonds, B-O-B linkages, and BO₃ and BO₄ units. The excitation spectra revealed broad Ce³⁺ (300–350 nm) bands and sharp peaks for Eu³⁺ (393 and 464 nm), indicating distinct optical behaviours. Emission spectra showed broad Ce³⁺ emission (400–450 nm) and sharp Eu³⁺ emission (592 and 615 nm), highlighting effective energy transfer between Ce³⁺-Eu³⁺ ions and improved luminescent properties. Decay kinetics demonstrated increased lifetime values with higher Eu³⁺ concentrations under 328 nm excitation, and consistent lifetime values were observed under 394 nm excitation due to the interplay of energy transfer dynamics, quenching effects, and the availability of non-radiative decay channels influenced by Eu³⁺ concentration and excitation wavelength. Among the prepared glasses, the LCBBCe_0.1Eu_0.5 glass exhibits the highest emission intensity in the deep red region, with an emission purity of 98.3% when excited at 394 nm.</p></div>","PeriodicalId":473,"journal":{"name":"Applied Physics A","volume":"131 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826468","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigation of the temperature-dependent functioning of BiFeO3 as a ferroelectric material through X-ray diffraction analysis","authors":"Rana Sayed,&nbsp;Ayat Hassanien,&nbsp;Hany Hashim,&nbsp;Ahmed Mabied,&nbsp;Ahmed Ramadan,&nbsp;Soltan Soltan","doi":"10.1007/s00339-024-08101-6","DOIUrl":"10.1007/s00339-024-08101-6","url":null,"abstract":"<div><p>In recent years, Bismuth Ferrite (BiFeO₃, BFO) has emerged as a promising multiferroic material due to its high antiferromagnetic Néel temperature (T_N ~ 623–643 K) and ferroelectric Curie temperature (T_C ~ 1083–1103 K). These properties make BFO a strong candidate for exhibiting a magnetoelectric effect even at room temperature. Understanding the temperature-dependent ferroelectric behavior of BFO is crucial for optimizing its performance in applications where stable ferroelectric behavior at operational temperatures is essential for enhancing device efficiency, stability, and functionality. This study investigates the impact of temperature on the crystallographic characteristics (unit cell type, bond lengths, and dimensions) and ferroelectric performance of BFO. X-ray diffraction and electrical hysteresis measurements confirm the presence of a ferroelectric phase with a rhombohedral R3c structure, along with two phase transitions: the first around 600 K from ferroelectric to paraelectric, and the second near 1050 K from paraelectric back to ferroelectric.</p></div>","PeriodicalId":473,"journal":{"name":"Applied Physics A","volume":"131 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00339-024-08101-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826467","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Scars of Kramers–Henneberger atoms","authors":"E. Floriani,&nbsp;J. Dubois,&nbsp;C. Chandre","doi":"10.1140/epjd/s10053-024-00942-3","DOIUrl":"10.1140/epjd/s10053-024-00942-3","url":null,"abstract":"<p>Electron motion in an atom driven by an intense linearly polarized laser field can exhibit a laser-dressed stable state, referred to as the Kramers–Henneberger (KH) state or KH atom. Up to now, the existence conditions of this state rely on the presence of a double well in the KH potential, obtained by averaging the motion over one period of the laser. However, the approximation involved in the averaging is largely invalid in the region of the double well structure; therefore, this raises the question of its relevance for identifying signatures of these exotic states. Here, we present a method to establish conditions for the existence of the KH atom based on a nonperturbative approach. We show that the KH atom is structured by an asymmetric periodic orbit with the same period as the laser field in a wide range of laser parameters. Its imprint is clearly visible on the wavefunction in quantum simulations. We identify the range of parameters for which this KH state is effective, corresponding to an elliptic periodic orbit.</p>","PeriodicalId":789,"journal":{"name":"The European Physical Journal D","volume":"78 12","pages":""},"PeriodicalIF":1.5,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142845073","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":"Electromagnetic induction heating assisted laser cleaning of metal oxide layer","authors":"Zhiwei Jing,&nbsp;Minghui Hong","doi":"10.1007/s00339-024-08167-2","DOIUrl":"10.1007/s00339-024-08167-2","url":null,"abstract":"<div><p>Metal oxide layer removal is an important part of steel processing in the automotive and mechanical engineering industry. Laser cleaning of metal oxide layer has attracted extensive attention for its selectivity and environmental protection. However, laser cleaning efficiency and high cleaning threshold remain challenges for industrial applications. To address these issues, a new electromagnetic induction heating assisted laser cleaning method is proposed. This innovative approach increases the cleaning efficiency and reduces the laser cleaning threshold via elevating surface temperature. With this novel technology, the laser cleaning threshold of metal oxide layer is reduced from 5.5 J/cm² to 3.3 J/cm². Oxygen content also decreases by 68.1% with the assistance of electromagnetic induction heating at the laser fluence of 3.3 J/cm². To validate the industrial applications of the electromagnetic heating assisted laser cleaning, a rusty steel plate is used as a sample. At the same laser fluence, the time for the rust layer reaches its evaporation temperature is shortened when assisted by the electromagnetic induction heating. The cleaning time is reduced by approximately 50% at the laser fluence of 3.3 J/cm².</p></div>","PeriodicalId":473,"journal":{"name":"Applied Physics A","volume":"131 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142826207","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}