Solid State Communications最新文献

{"title":"Friedel oscillations induced by point impurity in Dirac semimetal","authors":"Benhu Zhou ,&nbsp;Benliang Zhou","doi":"10.1016/j.ssc.2025.116283","DOIUrl":"10.1016/j.ssc.2025.116283","url":null,"abstract":"<div><div>We study the mechanism of the point impurity scattering in the Dirac semimetal (DSM). By adopting the Green’s function combined the <span><math><mi>T</mi></math></span>-matrix approximation, we calculate the local density of states (LDOS) in the momentum and real spaces near the point impurity. We find that the pattern of the LDOS in the momentum space well reflects the shape of the Fermi surface. It appears one concentric contour located at the center, corresponding to the largest scattering on the Fermi surface. The LDOS oscillations in the real space is evaluated numerically and analytically to certain extent to better understand the physical mechanisms, respectively, with the well agreement of the results from both methods. The LDOS oscillations can be well fitted by a <span><math><msup><mrow><mi>x</mi></mrow><mrow><mo>−</mo><mn>1</mn></mrow></msup></math></span> power-law decay envelop function, consistent with that observed in graphene with the semimetallic phase, attributed from the similar linear dispersion. Our findings can be tested by the scanning tunneling microscope in experiment, also provide a deeper understanding of the DSM.</div></div>","PeriodicalId":430,"journal":{"name":"Solid State Communications","volume":"409 ","pages":"Article 116283"},"PeriodicalIF":2.4,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145748819","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":"Grain growth kinetics, microhardness and nonlinear electrical properties of ZnO-V2O5-Nb2O5 varistor ceramics","authors":"Tapatee Kundu Roy","doi":"10.1016/j.ssc.2025.116295","DOIUrl":"10.1016/j.ssc.2025.116295","url":null,"abstract":"<div><div>Grain growth kinetics, microhardness and nonlinear electrical properties in Nb₂O₅ added ZnO-V₂O₅ varistor ceramics were studied by sintering at 900, 1000 and 1100 °C for 30, 60, 120 and 240 min duration. Microstructural characterization reveals grain coarsening during isothermal heating, initially at a faster rate followed by a relatively slower rate until it nearly reaches a plateau. Kinetic analysis of grain growth was conducted to determine the grain growth exponent and the activation energy. The value of the growth exponent (3.73–6.37) and the corresponding activation energy (222.2 ± 26 kJ/mol) indicate a lesser grain growth rate than only V₂O₅ doped ZnO varistors. Indentation hardness performed with Vicker's diamond indenter at the load range of 4.9–19.6 N show strong dependence on sintering temperature. The microhardness values follow an inverse relationship with grain size, measuring a maximum hardness of 2.76 ± 0.08 GPa for the sample with a grain size of 4.26 ± 0.15 μm. The varistor sintered at 900 °C for 30 min duration shows better nonlinear properties than the other samples.</div></div>","PeriodicalId":430,"journal":{"name":"Solid State Communications","volume":"409 ","pages":"Article 116295"},"PeriodicalIF":2.4,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145880189","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":"Hole to electron crossover in a (Cd,Mn)Te quantum well through surface metallization","authors":"A. Dydniański ,&nbsp;M. Raczyński ,&nbsp;A. Łopion ,&nbsp;T. Kazimierczuk ,&nbsp;J. Kasprzak ,&nbsp;K.E. Połczyńska ,&nbsp;W. Pacuski ,&nbsp;P. Kossacki","doi":"10.1016/j.ssc.2026.116324","DOIUrl":"10.1016/j.ssc.2026.116324","url":null,"abstract":"<div><div>In this work we look into how the contact material influences the local charge properties of a p-type CdTe-based quantum well. We study five metals deposited as 10 nm layers on the sample surface: Au, Ag, Cr, Ni and Ti. We use magneto-spectroscopy to discriminate their charge states through monitoring the Zeeman shifts at singlet-triplet transitions. Most tested metals retain the original p-type of the quantum well, while gold and nickel coverage flips the local doping to n-type. This is attributed to a robust bonding of these two metals to the semiconductor, efficiently passivating its surface and thus improving electron diffusion from the metal to the quantum well.</div></div>","PeriodicalId":430,"journal":{"name":"Solid State Communications","volume":"409 ","pages":"Article 116324"},"PeriodicalIF":2.4,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145972812","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":"First-principles study of properties of hypothetical chalcopyrite-structured disulfides","authors":"Yury M. Basalaev ,&nbsp;Ekaterina B. Duginova ,&nbsp;Sofia A. Marinova","doi":"10.1016/j.ssc.2025.116264","DOIUrl":"10.1016/j.ssc.2025.116264","url":null,"abstract":"<div><div>Using density functional theory (DFT) methods, we modeled the chalcopyrite crystal structure of five hypothetical Li<em>M</em>S₂ crystals (<em>M</em> = B, Al, Ga, In, Tl). Equilibrium lattice parameters were determined, stability conditions were investigated, and elastic stiffness constants along with fundamental elastic moduli were calculated. Three-dimensional isosurfaces of Young's modulus and compressibility were constructed. Cauchy pressures, microhardness, Grüneisen parameter, Poisson's ratio, fracture toughness, and brittleness index were computed. Phonon and infrared (IR) spectra were obtained, and atomic contributions to vibrational modes of the studied crystals were analyzed. The comprehensive set of theoretical results indicates the feasibility of synthesizing and the stability of tetragonal Li<em>M</em>S₂ crystals with the chalcopyrite lattice structure.</div></div>","PeriodicalId":430,"journal":{"name":"Solid State Communications","volume":"409 ","pages":"Article 116264"},"PeriodicalIF":2.4,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145623189","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":"Relation between chiral anomaly and electric transport in 1D Dirac semimetal","authors":"Mustafa Bohra,&nbsp;Mikhail Zubkov","doi":"10.1016/j.ssc.2025.116276","DOIUrl":"10.1016/j.ssc.2025.116276","url":null,"abstract":"<div><div>We investigate the interplay of chiral anomaly and dissipation in one-dimensional Dirac semimetal. For definiteness we consider the Su–Schrieffer–Heeger (SSH) model, which on the language of lattice field theory represents 1 D Wilson fermions. We employ the non-equilibrium Keldysh Green function formalism, and calculate the chiral imbalance and electric conductivity in the presence of energy dissipation, revealing how these observables are connected to the chiral anomaly. By systematically incorporating dissipation effects into the Keldysh framework, we demonstrate how the anomaly-induced contributions manifest in both axial charge density and electric current.</div></div>","PeriodicalId":430,"journal":{"name":"Solid State Communications","volume":"409 ","pages":"Article 116276"},"PeriodicalIF":2.4,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145748817","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":"The effects of MnO2 doping on the structure, dielectric properties and oxygen vacancies of 82NaNbO3-18CaTiO3 lead-free ceramics","authors":"Yipeng Xiao ,&nbsp;Qiubo Hu ,&nbsp;Yudi Fan ,&nbsp;Yuke Meng ,&nbsp;Bingxu Huo ,&nbsp;Shuang Liu ,&nbsp;Wenbo Luo ,&nbsp;Fengzi Zhou ,&nbsp;Hao Li ,&nbsp;Zhiyu Min ,&nbsp;Xiaofei Wang","doi":"10.1016/j.ssc.2025.116278","DOIUrl":"10.1016/j.ssc.2025.116278","url":null,"abstract":"<div><div>In this study, 82NaNbO₃-18CaTiO₃-xwt%MnO₂ lead-free ceramics were prepared using the traditional solid-state method. The effects of different MnO₂ doping levels (x = 0, 1, 2, 3) on the phase structure, microstructure, and dielectric properties of the materials were systematically investigated. The XRD analysis indicated that all samples displayed a stable perovskite structure and no secondary phase was detected, and Rietveld refinement analysis showed good fits for all samples, with GoF less than 2. As the amount of MnO₂ doping increases, the diffraction peak shifts towards a smaller angle, suggesting that Mn²⁺/Mn³⁺ substitutes for B-site ions, resulting in lattice expansion. The SEM results indicate that doping with MnO₂ significantly inhibits grain growth, and the average grain size decreases to 3.3 μm at x = 3, which is attributed to excessive MnO₂ hindering grain boundary migration at grain boundaries. The dielectric properties tests indicate that ε_r and tanδ can be tuned by doping with MnO₂, and the sample with x = 1 exhibits excellent temperature stability. In order to further analyze the dielectric properties of the samples, the electrical modulus (M\") results showed a relaxation phenomenon, and the activation energy (E_a) was calculated by Arrhenius relationship. It was found that the change in the E_a value may be closely related to the OVs compensation mechanism. The existence of OVs was further confirmed by XPS analysis and its relationship with the MnO₂ doping content was explained. Impedance measurements indicate that doping with MnO₂ significantly improves the insulation performance of the material. The E_a was calculated, and the reasons for its variation were discussed. This study provides an experimental reference for the optimization of dielectric properties and defect regulation of lead-free antiferroelectric ceramic materials.</div></div>","PeriodicalId":430,"journal":{"name":"Solid State Communications","volume":"409 ","pages":"Article 116278"},"PeriodicalIF":2.4,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145748818","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":"Condensation mechanism of high-Tc cuprates: The key role of pairon excitations","authors":"Yves Noat ,&nbsp;Alain Mauger ,&nbsp;William Sacks","doi":"10.1016/j.ssc.2025.116252","DOIUrl":"10.1016/j.ssc.2025.116252","url":null,"abstract":"<div><div>In this article we show that the condensation mechanism in cuprates involves the strong coupling of the condensate to pairon excited states. We present an accessible formalism that significantly extends our previous work, providing a theoretical basis for the energy-dependent gap function <span><math><mrow><mi>Δ</mi><mrow><mo>(</mo><mi>E</mi><mo>)</mo></mrow></mrow></math></span>. The latter is proportional to the effective spin exchange energy, <span><math><msub><mrow><mi>J</mi></mrow><mrow><mi>e</mi><mi>f</mi><mi>f</mi></mrow></msub></math></span>, with no retardation effects, such as the case of spin-fluctuation or phonon mediated couplings. The fundamental parameters of the superconducting (SC) state are the condensation energy per pair, <span><math><msub><mrow><mi>β</mi></mrow><mrow><mi>c</mi></mrow></msub></math></span>, and the antinodal energy gap, <span><math><msub><mrow><mi>Δ</mi></mrow><mrow><mi>p</mi></mrow></msub></math></span>, which are quantitatively extracted by fitting the cuprate quasiparticle spectrum from tunneling experiments.</div><div>An explicit formula for the critical temperature is also derived in the model. Valid for any doping, we find <span><math><msub><mrow><mi>T</mi></mrow><mrow><mi>c</mi></mrow></msub></math></span> to be proportional to <span><math><msub><mrow><mi>β</mi></mrow><mrow><mi>c</mi></mrow></msub></math></span>, and not the gap <span><math><msub><mrow><mi>Δ</mi></mrow><mrow><mi>p</mi></mrow></msub></math></span>, in sharp contrast to conventional SC. The numerical factor <span><math><mrow><msub><mrow><mi>β</mi></mrow><mrow><mi>c</mi></mrow></msub><mo>/</mo><msub><mrow><mi>k</mi></mrow><mrow><mi>B</mi></mrow></msub><msub><mrow><mi>T</mi></mrow><mrow><mi>c</mi></mrow></msub><mo>≃</mo><mn>2</mn><mo>.</mo><mn>24</mn></mrow></math></span> originates from pair excitations of the condensate, following Bose statistics, with a mini-gap <span><math><mrow><msub><mrow><mi>δ</mi></mrow><mrow><mi>M</mi></mrow></msub><mo>≃</mo><mn>1</mn><mspace></mspace></mrow></math></span>meV in the excitation spectrum. These results strongly suggest that the same ‘all-electron’ mechanism is at work all along the <span><math><msub><mrow><mi>T</mi></mrow><mrow><mi>c</mi></mrow></msub></math></span>-dome.</div></div>","PeriodicalId":430,"journal":{"name":"Solid State Communications","volume":"408 ","pages":"Article 116252"},"PeriodicalIF":2.4,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145621823","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 electronic and ferromagnetic characteristics OF ZnO:Ag nanotubes","authors":"Vusala Nabi Jafarova,&nbsp;Kh.O. Sadig,&nbsp;A.A. Hadiyeva,&nbsp;J.R. Sultanova","doi":"10.1016/j.ssc.2025.116261","DOIUrl":"10.1016/j.ssc.2025.116261","url":null,"abstract":"&lt;div&gt;&lt;div&gt;The electronic and magnetic properties of silver-doped single-walled ZnO nanotubes (SW-ZnO:AgNTs) with (6,0) chirality were investigated using density functional theory (DFT). The structural model was constructed by substituting one Zn atom with an Ag atom in a (6,0) ZnO nanotube containing 12 Zn and 12 O atoms. For single substitution, one Zn atom was replaced by one Ag atom, corresponding to &lt;em&gt;x&lt;/em&gt; ≈ 0.08 in Ag&lt;sub&gt;&lt;em&gt;x&lt;/em&gt;&lt;/sub&gt;Zn&lt;sub&gt;1-&lt;em&gt;x&lt;/em&gt;&lt;/sub&gt;O. For double substitution, two Zn atoms were replaced by Ag atoms (&lt;em&gt;x&lt;/em&gt; ≈ 0.16), placed at non-adjacent Zn sites to reduce artificial interaction. In the double substitution configuration, Ag atoms were positioned at a minimum distance of ∼6.38 &lt;em&gt;Å&lt;/em&gt; to study the effect of non-interacting dopants on the electronic and magnetic properties. All structures were fully relaxed using a force convergence criterion of 0.01 eV/Å. Spin-polarized DFT calculations were performed for all configurations to capture the magnetic response induced by Ag doping. Our simulations, performed using the Quantum ATK software, reveal that Ag doping induces notable changes in the electronic structure, including a reduction of the band gap and the emergence of spin polarization.&lt;/div&gt;&lt;div&gt;For pristine SW-ZnONTs, we obtain a direct band gap of 3.10 eV, confirming their semiconducting and non-magnetic nature. Ag doping breaks this symmetry and introduces strong spin polarization. In the singly doped system, the spin-up channel retains a reduced band gap of about 2.5 eV, while the spin-down channel becomes almost gapless at the Fermi level, indicating clear half-metallic behavior. Double Ag doping preserves this asymmetry and further enhances spin polarization, with a slightly smaller spin-up band gap than in the singly doped case. Mulliken analysis reveals a total magnetic moment of approximately 1.0 &lt;em&gt;μ&lt;/em&gt;&lt;sub&gt;&lt;em&gt;B&lt;/em&gt;&lt;/sub&gt; for single doping, originating mainly from the oxygen atoms (∼0.8 &lt;em&gt;μ&lt;/em&gt;&lt;sub&gt;&lt;em&gt;B&lt;/em&gt;&lt;/sub&gt;) surrounding the Ag dopant and a smaller contribution from Ag itself (∼0.2 &lt;em&gt;μ&lt;/em&gt;&lt;sub&gt;&lt;em&gt;B&lt;/em&gt;&lt;/sub&gt;). Total energy calculations comparing ferromagnetic and antiferromagnetic configurations show that the FM phase is energetically more favorable by 0.048 eV, confirming the stability of ferromagnetism in the doped nanotube. Quantitative analysis of the bound magnetic polaron (BMP) characteristics reveals effective BMP radii of ∼2.2 &lt;em&gt;Å&lt;/em&gt; and a significant increase in BMP number density from single to double Ag doping, confirming a percolative BMP-mediated mechanism that stabilizes long-range ferromagnetism above room temperature. The estimated Curie temperature (≈370 &lt;em&gt;K&lt;/em&gt;) confirms that the singly Ag-doped SW-ZnONT maintains stable ferromagnetic ordering above room temperature, highlighting its potential for spintronic devices. The structural integrity is preserved post-doping, with minimal atomic distortion, low residual forces, and negligible stress values,","PeriodicalId":430,"journal":{"name":"Solid State Communications","volume":"408 ","pages":"Article 116261"},"PeriodicalIF":2.4,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145621822","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":"Longitudinal charge and spin current in two-dimensional electronic quadratic band system under the irradiating of linearly polarized light","authors":"H.-M. Yang,&nbsp;G.-B. Zhu","doi":"10.1016/j.ssc.2025.116294","DOIUrl":"10.1016/j.ssc.2025.116294","url":null,"abstract":"<div><div>In this paper, we present a study of longitudinal charge and spin current of two-dimensional electronic system with a quadratic band crossing point under irradiating of the linearly polarized light. The linearly polarized light can induce a pair of additional points in the system, where the energy splitting between the two energy branches vanishes. The locations of the points are determined by the amplitude of the light. Furthermore, the longitudinal charge and spin current can be controlled by tuning the amplitude of light field. The light field leads to the longitudinal spin current along the direction of electric field. Our work provides a way for manipulating transport properties in two dimensional materials that could facilitate the experimental detection and realistic applications.</div></div>","PeriodicalId":430,"journal":{"name":"Solid State Communications","volume":"409 ","pages":"Article 116294"},"PeriodicalIF":2.4,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145837323","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":"Electrical behavior of Na1-xKxNbO3 ceramics (0.25 ≤ x ≤ 0.35) and high-temperature phase transitions","authors":"Jyotsana Negi ,&nbsp;N.S. Panwar","doi":"10.1016/j.ssc.2025.116308","DOIUrl":"10.1016/j.ssc.2025.116308","url":null,"abstract":"<div><div>The ceramic system Na_1−xK_xNbO₃ (0.250 ≤ x ≤ 0.350) is prepared using the solid-state reaction method, and its phase structure and electrical properties are investigated as functions of temperature. Dielectric measurements are conducted from room temperature (RT) to 500 °C at 1 MHz, revealing three distinct phase transitions near 200 °C, 380 °C, and 460 °C for x values ranging from 0.250 to 0.350. Temperature-dependent X-ray powder diffraction of Na_0.685K_0.315NbO₃ is performed, and the lattice parameters are determined using Rietveld refinement. The results revealed three distinct anomalies associated with successive M–T–T–C (monoclinic → two tetragonal → cubic) phase transitions. The transition temperatures shift slightly with increasing potassium content, indicating compositional control of phase stability. The high-temperature X-ray diffraction (HT-XRD) results are consistent with the observed dielectric properties, highlighting the structural transitions in Na_1−xK_xNbO₃ ceramics.</div></div>","PeriodicalId":430,"journal":{"name":"Solid State Communications","volume":"409 ","pages":"Article 116308"},"PeriodicalIF":2.4,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145921197","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}