Physics Letters A最新文献

{"title":"Retraction notice to “The combined effects of electric field and embedded dielectric matrix on the electronic and optical properties in Ge/SiGe core/shell quantum dots and its SiGe/Ge inverted structure” [Physics Letters A (2024) 129760]","authors":"K. Hammouda ,&nbsp;N. Yahyaoui ,&nbsp;N. Zeiri ,&nbsp;P. Baser ,&nbsp;C.A. Duque ,&nbsp;Mohammad N. Murshed ,&nbsp;M. Said","doi":"10.1016/j.physleta.2025.130471","DOIUrl":"10.1016/j.physleta.2025.130471","url":null,"abstract":"<div><div>This article has been retracted: please see Elsevier Policy on Article Withdrawal (<span><span>https://www.elsevier.com/about/policies/article-withdrawal</span><svg><path></path></svg></span>).</div><div>This article has been retracted at the request of the Editor.</div><div>Post-publication, it came to the attention of the journal that the authors did not obtain the necessary approval from the journal editor for the addition of a new author and a change to the author order, which is contrary to the journal policy on changes to authorship. In addition, the newly added author (Dr. C.A. Duque) had been suggested as a reviewer by the authors at the submission stage. The editor reached out to the authors for an explanation to the above points, but they failed to provide a satisfactory explanation.</div><div>Overall, the editor believes that adding a new author at the revision stage without obtaining the necessary approval from the journal editor is contrary to the journal policies and decided to retract the paper.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"544 ","pages":"Article 130471"},"PeriodicalIF":2.3,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143705412","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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":"High thermal properties of cubic MgO: DFT study of stability, electronic, phononic, and optical properties using hybrid exchange correlation functional","authors":"Nzar Rauf Abdullah ,&nbsp;Yousif Hussein Azeez ,&nbsp;Vidar Gudmundsson","doi":"10.1016/j.physleta.2025.130483","DOIUrl":"10.1016/j.physleta.2025.130483","url":null,"abstract":"<div><div>The current study focuses on examining the electronic, vibrational, thermal, and optical properties of the cubic MgO crystal structure in two different space groups: Fm<span><math><mover><mrow><mn>3</mn></mrow><mrow><mo>¯</mo></mrow></mover></math></span>m and Pm<span><math><mover><mrow><mn>3</mn></mrow><mrow><mo>¯</mo></mrow></mover></math></span>n identified as MgO-1 and MgO-2, respectively. MgO-1 has high symmetry leading to rather isotropic electronic properties, while MgO-2 is comparably less symmetric causing it to have more directional properties compared to MgO-1. However, MgO-1 demonstrates a wider band gap of 4.47(6.12) eV found by using GGA(HSE06) compared to the band gap of MgO-2's set at 2.89(4.68) eV using GGA(HSE06). This difference in band gaps can be attributed to the electrostatic environment surrounding the atoms in MgO-1 being more uniform. The high symmetry leads to degenerate energy levels contributing to a wider band gap of MgO-1. Through negative formation energy, phonon band structure calculations, and molecular dynamics simulations, we confirm that both phases of cubic MgO are energetically, dynamically and thermally stable. The MgO-2 has a higher phonon density of states and thus heat capacity compared to MgO-1. MgO-1 exhibits higher absorption and a higher maximum refractive index compared to MgO-2, suggesting its suitability for applications requiring strong light interaction. These findings suggest that MgO-1 and MgO-2 could be promising materials for applications requiring specific optical properties, such as optical filters, wave-guides, or nonlinear optical devices.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"544 ","pages":"Article 130483"},"PeriodicalIF":2.3,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143725294","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":"Tunable four-band metamaterial absorber and sensor based on a stacking double-ring Dirac semimetal structure design","authors":"Leiyu Li,&nbsp;Fang Chen","doi":"10.1016/j.physleta.2025.130489","DOIUrl":"10.1016/j.physleta.2025.130489","url":null,"abstract":"<div><div>We proposed a novel fourfold narrow-band terahertz absorber based on a double-ring Dirac semimetal (BDS) layout. The designed structure exhibits a three-layer pattern of a double-ring layer of BDS, a <span><math><mrow><mi>S</mi><mi>i</mi><msub><mi>O</mi><mn>2</mn></msub></mrow></math></span> dielectric layer and a perfect electric conductor (PEC) layer. The BDS-based absorber is highly tunable, its conductivity can be tuned by varying the applied bias voltage, which subsequently alters the field distribution and absorption feature. By employing the Finite Element Method (FEM) of CST STUDIO SUITE, the absorption characteristics are thoroughly investigated. The simulation results revealed that the absorber exhibited remarkable absorption performance, with nearly perfect absorption rates of 99.9 %, 98.7 %, 99.4 %, and 99.9 % at frequencies of 6.836 THz, 7.700 THz, 8.728 THz, and 9.362 THz, respectively. The quality factor (<em>Q</em>) values of the four absorption modes are calculated as 227.9, 167.4, 101.48, and 102.9, respectively. The influence of various factors, including geometric structural parameters and the incident angle of electromagnetic waves, is comprehensively studied. The absorber exhibited excellent polarization insensitivity owing to its structural symmetry. When the Fermi energy of the BDS is tuned from 80 to 100 <em>meV</em>, the absorption frequencies could be tuned within a specific range, resulting in an excellent absorption effect. Additionally, the refractive index sensitivity (<span><math><mi>S</mi></math></span>) is defined, and for the four absorption modes, it is determined to be 503.2 <span><math><mrow><mi>G</mi><mi>H</mi><mi>z</mi><mo>/</mo><mi>R</mi><mi>I</mi><mi>U</mi></mrow></math></span>, 871.0 <span><math><mrow><mi>G</mi><mi>H</mi><mi>z</mi><mo>/</mo><mi>R</mi><mi>I</mi><mi>U</mi></mrow></math></span>, 696.0 <span><math><mrow><mi>G</mi><mi>H</mi><mi>z</mi><mo>/</mo><mi>R</mi><mi>I</mi><mi>U</mi></mrow></math></span>, and 122.0 <span><math><mrow><mi>G</mi><mi>H</mi><mi>z</mi><mo>/</mo><mi>R</mi><mi>I</mi><mi>U</mi></mrow></math></span>when the refractive index varies within a specific range. Our design achieves superior refractive index sensitivity (871.0 GHz/RIU) and maintains four-band absorption without structural complexity, enabling multifunctional sensing applications.This high-performance absorber holds great potential in the frontier fields of biochemical sensing and environmental detection.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"544 ","pages":"Article 130489"},"PeriodicalIF":2.3,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143725296","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":"Quantum capacitance and thermoelectric properties of MoS2 monolayer influenced by (Si, P-Cl and Se) doping and (Au and Ag) decorating: A first-principles study","authors":"Nadia Salami ,&nbsp;Shirin Sabokdast ,&nbsp;Leila Fekri Aval","doi":"10.1016/j.physleta.2025.130481","DOIUrl":"10.1016/j.physleta.2025.130481","url":null,"abstract":"<div><div>In this paper, we investigated the electronic thermoelectric properties, and quantum capacitance of MoS₂ sheet, decorated and doped with atoms such as Au, Ag, Se, Si, P, and Cl by density functional theory (DFT) method. Also the impacts of two different concentrations of Se and Si doping are discussed on these properties. It is estimated that the substitutional doping of one sulfur atom using Si atoms with 2.2% concentration and also Au and Ag decorating atoms results in an improvement of the quantum capacitance of the MoS₂ monolayer at Fermi energy with values of 46.0 μF/cm², 30.9 μF/cm² and 36.0 μF/cm², respectively. Also high adsorption energy of the Au and Ag atoms reflects that both of them are easily able to decorate and adsorb on the ideal MoS₂ surface. Finally, it is found that power factor of the MoS₂ monolayer is generally reduced due to the dopant atoms and decorating atoms. This study could potentially open new horizons in the design of electronic devices including supercapacitors and thermoelectric devices based on two-dimensional materials.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"545 ","pages":"Article 130481"},"PeriodicalIF":2.3,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143739598","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":"Generalized quantum Jensen-Shannon divergence of imaginarity","authors":"Peihua Tian,&nbsp;Yuan Sun","doi":"10.1016/j.physleta.2025.130479","DOIUrl":"10.1016/j.physleta.2025.130479","url":null,"abstract":"<div><div>We utilize two types of generalized quantum Jensen-Shannon divergence to detect the imaginarity of quantum states from two perspectives: the deviations of the state from its conjugate state and from its real part. We reveal their basic properties and demonstrate that the generalized quantum Jensen-Shannon divergence of imaginarity via Tsallis relative entropy are valid imaginarity measures, while those via Tsallis entropy are merely imaginarity quantifiers. Furthermore, we establish two complementary relations between the imaginarity and uncertainty of a quantum state via Tsallis entropy. We also connect the four imaginarity quantifiers provided in this work with three existing imaginarity measures: trace norm of imaginarity, relative entropy of imaginarity and Tsallis relative entropy of imaginarity. Finally, we evaluate the imaginarity of pure states and the maximally imaginary mixed states and find that the trends of various imaginarity quantifiers with the state parameter can be affected by the measure parameter, and vice versa.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"544 ","pages":"Article 130479"},"PeriodicalIF":2.3,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143725290","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":"Crack nucleation and propagation in β-HMX induced by structural phase transitions","authors":"Jiahui Li ,&nbsp;Chuanguo Zhang ,&nbsp;Zhi Zeng","doi":"10.1016/j.physleta.2025.130491","DOIUrl":"10.1016/j.physleta.2025.130491","url":null,"abstract":"<div><div>Exploring the micro-mechanisms of crack nucleation and propagation in β-HMX, a high-energy molecular crystal, is crucial for predicting the explosive lifetime. In this study, molecular dynamics simulations were employed to simulate the fracture of β-HMX under tensile loading. Our results show that β-HMX single crystals undergo fracture via molecular phase transitions and aggregation. Crack nucleation and propagation are closely linked to these transitions. During plastic deformation, stress-induced local temperature elevations trigger the β to α and β to δ transitions. Once the phase-transformed clusters reach a critical size, cracks begin to nucleate. During the subsequent crack propagation, the proportions of the α and δ phases increase, and the cracks propagate predominantly along the phase transition regions. Crack tips exhibit twinning zones where β to α transitions occur, enabling crack penetration and connectivity. This atomic-level insight elucidates the pivotal role of the phase transitions in the nucleation and propagation of cracks.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"544 ","pages":"Article 130491"},"PeriodicalIF":2.3,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143725292","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":"Perspectives on quantum friction, self-propulsion, and self-torque","authors":"Kimball A. Milton ,&nbsp;Nima Pourtolami ,&nbsp;Gerard Kennedy","doi":"10.1016/j.physleta.2025.130475","DOIUrl":"10.1016/j.physleta.2025.130475","url":null,"abstract":"<div><div>This paper provides an overview of the nonequilibrium fluctuational forces and torques acting on a body either in motion or at rest relative to another body or to the thermal vacuum blackbody radiation. We consider forces and torques beyond the usual static Casimir-Polder and Casimir forces and torques. For a moving body, a retarding force emerges, called quantum or Casimir friction, which in vacuum was first predicted by Einstein and Hopf in 1910. Nonreciprocity may allow a stationary body, out of thermal equilibrium with its environment, to experience a torque. Moreover, if a stationary reciprocal body is not in thermal equilibrium with the blackbody vacuum, a self-propulsive force or torque can appear, resulting in a potentially observable linear or angular terminal velocity, even after thermalization.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"545 ","pages":"Article 130475"},"PeriodicalIF":2.3,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143739595","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":"Design of metasurface structures compatible with multiple detection methods for stealth applications","authors":"Yaokun Lou ,&nbsp;Xin-Hua Deng ,&nbsp;Jiaqi Geng ,&nbsp;Siyuan Zhu ,&nbsp;Yansong Liu ,&nbsp;Yuqiang Zhang ,&nbsp;Yanxu Bao ,&nbsp;Ping Hu","doi":"10.1016/j.physleta.2025.130487","DOIUrl":"10.1016/j.physleta.2025.130487","url":null,"abstract":"<div><div>With the rapid advancement of multispectral detection technologies, achieving multiband-compatible stealth has emerged as a critical challenge. Conventional microwave-absorbing materials struggle to reconcile the conflicting requirements of low infrared emissivity and high visible-light transmittance, while existing metamaterial designs exhibit limitations in balancing cross-band absorption efficiency and bandwidth. This study proposes a cross-band stealth metasurface (CSM) based on a frequency selective surface (FSS), gradient impedance matching, and indium tin oxide (ITO)/polyethylene terephthalate (PET) composite architecture. Innovatively introducing a structural co-optimization framework, we address multiband impedance mismatch through electromagnetic simulations, equivalent circuit models (ECM), and multiple interference theory (MIT), while implementing symmetric unit cell design to achieve polarization-insensitive characteristics with angular stability up to 35° Experimental results demonstrate that the CSM achieves over 90 % absorption in both microwave (44.8–56.9 GHz) and terahertz (1.65–2.39 THz) bands, while maintaining &gt;85 % visible-light transmittance and low infrared emissivity (0.495), with significant radar cross-section (RCS) reduction (&gt;10 dB). This design integrates optical transparency, infrared management, and electromagnetic adaptability, providing an innovative solution for next-generation multispectral-compatible stealth systems, with promising applications in military camouflage and intelligent optical devices.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"544 ","pages":"Article 130487"},"PeriodicalIF":2.3,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143715933","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":"Linear response conductance of metallic single electron pump","authors":"P. Srivilai ,&nbsp;T. Thongsuk ,&nbsp;P. Harata","doi":"10.1016/j.physleta.2025.130476","DOIUrl":"10.1016/j.physleta.2025.130476","url":null,"abstract":"<div><div>We calculate the linear-response conductance of a metallic single-electron pump using the path-integral Monte Carlo (PIMC) method. The Coulomb oscillations of the conductance are calculated to illustrate the influence of the Coulomb blockade effect on the system. Furthermore, the experimental conductance is compared with the calculated conductance of various gate voltage configurations and temperatures. The results are consistent even in the low-temperature regime, where significant quantum fluctuation occurs, and the semiclassical approximation fails. Consequently, the present investigation replicates the success of the PIMC approach while precisely describing the quantum fluctuation phenomena of single-electron devices.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"544 ","pages":"Article 130476"},"PeriodicalIF":2.3,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143725293","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":"Excitonic phenomena in the multilayer QDs: Perturbative approach","authors":"Sami Ortakaya ,&nbsp;Kawther Hammouda ,&nbsp;Nabil Zeiri ,&nbsp;Carlos A. Duque","doi":"10.1016/j.physleta.2025.130474","DOIUrl":"10.1016/j.physleta.2025.130474","url":null,"abstract":"<div><div>In the present study, exciton physics, similar to modeling the helium atomic model related to fermionic particles, is studied under a perturbative approach. This motivational model presents computational results for semiconductor nanocrystals with 3D confinement. The Coulomb interaction energy of excitons, the effective bandgap transition energy, and the optical transition rates for the <em>s</em>-wave exciton in the ground state are computed for GaAs/AlGaAs multi-layer quantum dots within the framework of the effective mass approximation. In a perturbative approach, lower transition energies are found for large Coulomb energy values. This behavior is because the Coulomb term is prominent in the effective bandgap, concluding that the perturbation approach in multilayer QDs yields accurate results. Additionally, analysis of optical transition rates, derived from the dipole matrix element and transition energies, enables a better understanding of the optical properties. Analyzing <em>s</em>-wave excitons through transition rates provides significant models for optical sensing and optoelectronic applications.</div></div>","PeriodicalId":20172,"journal":{"name":"Physics Letters A","volume":"544 ","pages":"Article 130474"},"PeriodicalIF":2.3,"publicationDate":"2025-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143705410","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}