物理最新文献

{"title":"Stochastic supervised neuro-architecture design for analyzing vector-borne plant virus epidemics with latency and incubation effects","authors":"Nabeela Anwar,&nbsp;Aqsa Ghaffar,&nbsp;Muhammad Asif Zahoor Raja,&nbsp;Iftikhar Ahmad,&nbsp;Muhammad Shoaib,&nbsp;Adiqa Kausar Kiani","doi":"10.1140/epjp/s13360-024-05883-9","DOIUrl":"10.1140/epjp/s13360-024-05883-9","url":null,"abstract":"<div><p>Comprehending the latent and incubation phases is crucial for the proliferation of infectious viruses and serves as a foundation for developing measures to prevent and govern outbreaks. This communication exploits the novel application of feedforward neural network optimizing with the Levenberg–Marquardt scheme (NN-LMQS) for analyzing the dynamics of viral transmission in plants via vectors, with the impacts of the latent and incubation periods. The governing framework consists of a system of delayed differential equations that incorporates both vulnerable and diseased plants, as well as vulnerable and diseased whitefly populations. The reference data set for the vector-borne plant virus epidemic model (VBPV-EM) is derived using the Adams numerical method by adapting variations in the disease propagation rate among infected vectors and susceptible plants, the natural mortality rate of plants, the cumulative growth rates of the vector population due to birth or migration, the vector mortality rate, net plant growth, and time delays. The effective correlations between the designed NN-LMQS and the reference solutions for the nonlinear VBPV-EM substantiate the robustness, proficiency, reliability, and precision of the approach, as endorsed by comprehensive simulation-based assessments, including regression metrics, error histograms, autocorrelation studies, and mean square errors.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"139 12","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142798382","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":"On the 3D wave propagation response of sandwich nanoplates with symmetric FGM face layers and GPRL-reinforced foam core layer","authors":"Mustafa Eroğlu,&nbsp;İsmail Esen,&nbsp;Mehmet Akif Koç","doi":"10.1140/epjp/s13360-024-05875-9","DOIUrl":"10.1140/epjp/s13360-024-05875-9","url":null,"abstract":"<div><p>This study investigates 3D wave propagation in a sandwich nanosensor plate, emphasizing thermo-mechanical characteristics. The research employs sinusoidal higher-order shear deformation and nonlocal strain gradient elasticity theories on sandwich construction, including functionally graded ceramic (Si₃N₄) and metal (Ti₆Al₄V) face layers and a graphene-reinforced metal foam core. The governing equations are formulated using Hamilton's principle and resolved by the Navier method, integrating temperature, Lorentz, and viscoelastic effects. The primary characteristics examined encompass graphene volume fraction, temperature fluctuations, nonlocal effects, foam porosity, and magnetic potential. The results demonstrate a phase velocity of almost 4.2 km/s at wave numbers above 100 1/nm at Δ<i>T</i> = 0, diminishing to approximately 3.0 km/s as Δ<i>T</i> approaches 1200. The findings enhance the optimization of nanosensor design for dependability under elevated temperature conditions.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"139 12","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142798265","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 cosmic timeline implied by the highest redshift quasars","authors":"Fulvio Melia","doi":"10.1140/epjc/s10052-024-13652-2","DOIUrl":"10.1140/epjc/s10052-024-13652-2","url":null,"abstract":"<div><p>The conventional picture of supermassive black-hole growth in the standard model had already been seriously challenged by the emergence of <span>(sim 10^9;M_odot )</span> quasars at <span>(zsim 7.5)</span>, conflicting with the predicted formation of structure in the early <span>(varLambda )</span>CDM Universe. But the most recent <i>JWST</i> discovery of a <span>(sim 10^8;M_odot )</span> source at <span>(zsim 10.1)</span> argues even more strongly against the possibility that these black holes were created in Pop II or III supernovae, followed by Eddington-limited accretion. Attempts at resolving this anomaly have largely focused on the formation of seeds via an exotic, direct collapse of primordial gas to an initial mass <span>(sim 10^5;M_odot )</span> – a process that has never been seen anywhere in the cosmos. Our goal in this <i>Letter</i> is to demonstrate that the emergence of these black holes is instead fully consistent with standard astrophysics in the context of the alternative Friedmann–Lemaître–Robertson–Walker cosmology known as the <span>(R_textrm{h}=ct)</span> universe. We show that, while the predicted evolution in the standard model is overly compressed, the creation, growth and appearance of such high-<i>z</i> quasars fall comfortably within the evolutionary history in this cosmology, thereby adding considerable observational support to the existing body of evidence favoring it over the standard scenario.</p></div>","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"84 12","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-024-13652-2.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142798368","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"The QED nonfactorizable correction to the semileptonic charmed three-body B decays","authors":"Yueling Yang,&nbsp;Liting Wang,&nbsp;Jiazhi Li,&nbsp;Qin Chang,&nbsp;Junfeng Sun","doi":"10.1140/epjc/s10052-024-13647-z","DOIUrl":"10.1140/epjc/s10052-024-13647-z","url":null,"abstract":"<div><p>In this paper, the nonfactorizable photonic corrections to the effective four-fermion vertex for the <span>(overline{B})</span> <span>({rightarrow })</span> <span>(D^{({*})})</span> <span>(+)</span> <span>({ell }^{-})</span> <span>(+)</span> <span>(bar{nu }_{ell })</span> decays are considered at the quark level within SM, where <span>({ell })</span> <span>(=)</span> <i>e</i>, <span>({mu })</span> and <span>({tau })</span>. It is found that the QED corrections are closely related with the mass of the charged lepton. The QED contributions will enhance branching ratios, which results in the slight reduction of ratios <span>(R(D^{(*)}))</span> and the relationship <span>(R(D^{(*)})_{e})</span> &lt; <span>(R(D^{(*)})_{mu })</span>.</p></div>","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"84 12","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-024-13647-z.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142798480","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"The role of Er2O3 on physical, structural, optical, and thermal, properties of bismuth–barium–tellurite glasses","authors":"Syed Mujeeb,&nbsp;B. Eraiah","doi":"10.1140/epjp/s13360-024-05888-4","DOIUrl":"10.1140/epjp/s13360-024-05888-4","url":null,"abstract":"<div><p>The impact of Er₂O₃ on the thermal, optical, structural, and physical characteristics of bismuth–barium tellurite glasses produced by the traditional melt quenching method. Glass’s composition, xEr₂O₃–(10-x) Bi₂O₃–20BaO–70TeO₂ (where x = 0, 1, 2, 3, 4, and 5 mol %) have been chosen for the study. The X-ray diffraction pattern indicates the amorphous nature; while, the host glass matrix’s functional group of Er₂O₃ is revealed by the Raman and FTIR spectroscopic structures. To investigate the effects of different concentrations of Er₂O₃ on the characteristics of glass, for example, its density, molar volume, as well as increased field strength, all physical parameters are inspected and assessed. On the other hand, when the Er₂O₃ content expanded, the inter-atomic distance, polaron radius, along oxygen packing density all dropped. Additionally, DSC has discovered that the erbium ion on the glass system raises the glass crystallization as well as transition temperatures due to its thermal characteristics. Utilizing Tauc’s plots, the optical energy band gap has been investigated. The remaining parameters, such as reflection loss, molar refractivity, optical transmission, numerical aperture, and electronic polarizability, were calculated by employing these energy band gaps. In contrast to an increase in molar refraction, the direct along with indirect energy gap, electronic polarizability, and refractive index, there was a decrease in optical transmission and metallization as the Er₂O₃ content expanded. The photoluminescence intensity shows the two strong quenching effects on emission at 396 nm and excitation wavelength at 396 and 285 nm as the Er₂O₃ concentration rises from 0 to 5 mol%. Also, in CIE chromaticity coordinates from violet to yellow region draw attention to tunable display application. It can be concluded that the glasses can be used in optical applications such as optoelectronics devices.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"139 12","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142798266","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":"Measurement and analysis of the (^{246})Cm and (^{248})Cm neutron capture cross-sections at the EAR2 of the n_TOF facility at CERN","authors":"V. Alcayne,&nbsp;A. Kimura,&nbsp;E. Mendoza,&nbsp;D. Cano-Ott,&nbsp;T. Martínez,&nbsp;O. Aberle,&nbsp;F. Álvarez-Velarde,&nbsp;J. Andrzejewski,&nbsp;L. Audouin,&nbsp;V. Bécares,&nbsp;M. Bacak,&nbsp;M. Barbagallo,&nbsp;F. Bečvář,&nbsp;G. Bellia,&nbsp;E. Berthoumieux,&nbsp;J. Billowes,&nbsp;D. Bosnar,&nbsp;A. Brown,&nbsp;M. Busso,&nbsp;M. Caamaño,&nbsp;L. Caballero-Ontanaya,&nbsp;F. Calviño,&nbsp;M. Calviani,&nbsp;A. Casanovas,&nbsp;F. Cerutti,&nbsp;Y. H. Chen,&nbsp;E. Chiaveri,&nbsp;N. Colonna,&nbsp;G. Cortés,&nbsp;M. A. Cortés-Giraldo,&nbsp;L. Cosentino,&nbsp;S. Cristallo,&nbsp;L. A. Damone,&nbsp;M. Diakaki,&nbsp;M. Dietz,&nbsp;C. Domingo-Pardo,&nbsp;R. Dressler,&nbsp;E. Dupont,&nbsp;I. Durán,&nbsp;Z. Eleme,&nbsp;B. Fernández-Domínguez,&nbsp;A. Ferrari,&nbsp;P. Finocchiaro,&nbsp;V. Furman,&nbsp;K. Göbel,&nbsp;A. Gawlik,&nbsp;S. Gilardoni,&nbsp;T. Glodariu,&nbsp;I. F. Gonçalves,&nbsp;E. González-Romero,&nbsp;C. Guerrero,&nbsp;F. Gunsing,&nbsp;H. Harada,&nbsp;S. Heinitz,&nbsp;J. Heyse,&nbsp;D. G. Jenkins,&nbsp;F. Käppeler,&nbsp;Y. Kadi,&nbsp;T. Katabuchi,&nbsp;N. Kivel,&nbsp;I. Knapova,&nbsp;M. Kokkoris,&nbsp;Y. Kopatch,&nbsp;M. Krtička,&nbsp;D. Kurtulgil,&nbsp;I. Ladarescu,&nbsp;C. Lederer-Woods,&nbsp;J. Lerendegui-Marco,&nbsp;S. Lo Meo,&nbsp;S. J. Lonsdale,&nbsp;D. Macina,&nbsp;A. Manna,&nbsp;A. Masi,&nbsp;C. Massimi,&nbsp;P. Mastinu,&nbsp;M. Mastromarco,&nbsp;F. Matteucci,&nbsp;E. A. Maugeri,&nbsp;A. Mazzone,&nbsp;A. Mengoni,&nbsp;V. Michalopoulou,&nbsp;P. M. Milazzo,&nbsp;F. Mingrone,&nbsp;A. Musumarra,&nbsp;A. Negret,&nbsp;R. Nolte,&nbsp;F. Ogállar,&nbsp;A. Oprea,&nbsp;N. Patronis,&nbsp;A. Pavlik,&nbsp;A. Pérez de Rada,&nbsp;J. Perkowski,&nbsp;L. Persanti,&nbsp;I. Porras,&nbsp;J. Praena,&nbsp;J. M. Quesada,&nbsp;D. Radeck,&nbsp;D. Ramos-Doval,&nbsp;T. Rauscher,&nbsp;R. Reifarth,&nbsp;D. Rochman,&nbsp;M. Sabaté-Gilarte,&nbsp;A. Saxena,&nbsp;P. Schillebeeckx,&nbsp;D. Schumann,&nbsp;S. Simone,&nbsp;A. G. Smith,&nbsp;N. V. Sosnin,&nbsp;A. Stamatopoulos,&nbsp;G. Tagliente,&nbsp;J. L. Tain,&nbsp;T. Talip,&nbsp;A. Tarifeño-Saldivia,&nbsp;L. Tassan-Got,&nbsp;A. Tsinganis,&nbsp;J. Ulrich,&nbsp;S. Urlass,&nbsp;S. Valenta,&nbsp;G. Vannini,&nbsp;V. Variale,&nbsp;P. Vaz,&nbsp;A. Ventura,&nbsp;D. Vescovi,&nbsp;V. Vlachoudis,&nbsp;R. Vlastou,&nbsp;A. Wallner,&nbsp;P. J. Woods,&nbsp;T. Wright,&nbsp;P. Žugec","doi":"10.1140/epja/s10050-024-01453-w","DOIUrl":"10.1140/epja/s10050-024-01453-w","url":null,"abstract":"<div><p>The <span>(^{246})</span>Cm(n,<span>(gamma )</span>) and <span>(^{248})</span>Cm(n,<span>(gamma )</span>) cross-sections have been measured at the Experimental Area 2 (EAR2) of the n_TOF facility at CERN with three C<span>(_6)</span>D<span>(_6)</span> detectors. This measurement is part of a collective effort to improve the capture cross-section data for Minor Actinides (MAs), which are required to estimate the production and transmutation rates of these isotopes in light water reactors and innovative reactor systems. In particular, the neutron capture in <span>(^{246})</span>Cm and <span>(^{248})</span>Cm open the path for the formation of other Cm isotopes and heavier elements such as Bk and Cf and the knowledge of (n,<span>(gamma )</span>) cross-sections of these Cm isotopes plays an important role in the transport, transmutation and storage of the spent nuclear fuel. The reactions <span>(^{246})</span>Cm(n,<span>(gamma )</span>) and <span>(^{248})</span>Cm(n,<span>(gamma )</span>) have been the two first capture measurements analyzed at n_TOF EAR2. Until this experiment and two recent measurements performed at J-PARC, there was only one set of data of the capture cross-sections of <span>(^{246})</span>Cm and <span>(^{248})</span>Cm, that was obtained in 1969 in an underground nuclear explosion experiment. In the measurement at n_TOF a total of 13 resonances of <span>(^{246})</span>Cm between 4 and 400 eV and 5 of <span>(^{248})</span>Cm between 7 and 100 eV have been identified and fitted. The radiative kernels obtained for <span>(^{246})</span>Cm are compatible with JENDL-5, but some of them are not with JENDL-4, which has been adopted by JEFF-3.3 and ENDF/B-VIII.0. The radiative kernels obtained for the first three <span>(^{248})</span>Cm resonances are compatible with JENDL-5, however, the other two are not compatible with any other evaluation and are 20 and 60% larger than JENDL-5.</p></div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"60 12","pages":""},"PeriodicalIF":2.6,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epja/s10050-024-01453-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142798369","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":"Anomaly induced inflation in the minimal quartic extension of Einstein’s gravity","authors":"Kerim Demirel,&nbsp;Bayram Tekin","doi":"10.1140/epjc/s10052-024-13611-x","DOIUrl":"10.1140/epjc/s10052-024-13611-x","url":null,"abstract":"<div><p>A particular extension of Einstein’s General Relativity up to and including quartic terms in the curvature tensor is minimal in the sense that it has a unique maximally symmetric vacuum and only a massless spin-2 excitation in its spectrum around the vacuum. We study the inflation phase of the universe in this minimal quartic extension of Einstein’s gravity in the presence of trace anomaly terms coming from the Standard Model fields and the fields of the Minimal Supersymmetric Standard Model. We show that the theory allows a quasi-de Sitter phase with sufficient <i>e</i>-foldings.</p></div>","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"84 12","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-024-13611-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142798467","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"On the photon mass generation in Rarita–Schwinger QED","authors":"M. Ghasemkhani,&nbsp;G. Soleimani,&nbsp;A. Soto,&nbsp;R. Bufalo","doi":"10.1140/epjc/s10052-024-13640-6","DOIUrl":"10.1140/epjc/s10052-024-13640-6","url":null,"abstract":"<div><p>This work examines the dynamical mass generation for the photon in Rarita–Schwinger QED. We focus our attention on the cases of <span>(omega =2,3)</span> dimensional spacetime. In these frameworks, it is well known that in the usual QED, the photon field (dynamically) acquires a gauge invariant mass (the Schwinger and Chern–Simons mass, respectively). We wish to scrutinize this phenomenon in terms of the Rarita–Schwinger fields. The presence of higher-derivative terms is shown as the leading contributions to the 1PI function <span>(langle AA rangle )</span> at one-loop order. We study the pole structure of the photon’s complete propagator to unveil the main effects of the Rarita–Schwinger fields on the photon’s mass. In addition, we present some remarks about the renormalizability of this model (in different dimensions) due to the presence of higher-derivative corrections at one-loop.</p></div>","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"84 12","pages":""},"PeriodicalIF":4.2,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-024-13640-6.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142798483","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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":"Investigation of MoS2-hydrogen interaction using in-situ X-ray diffraction studies","authors":"Ramesh Kumar,&nbsp;Nitesh K. Chourasia,&nbsp;Pawan K. Kulriya,&nbsp;Mahesh Kumar,&nbsp;Vinod Singh","doi":"10.1007/s00339-024-08143-w","DOIUrl":"10.1007/s00339-024-08143-w","url":null,"abstract":"<div><p>The present manuscript examines the significant effects of hydrogen (H₂) exposure on the structural properties of molybdenum disulfide (MoS₂) thin films through in-situ X-ray diffraction (XRD) analysis. Molybdenum (Mo) thin films were initially deposited using the electron beam (e-beam) deposition method and subsequently sulfurized via chemical vapor deposition (CVD) to obtain MoS₂ thin films. The quality of the MoS₂ films was optimized by varying the thickness of the Mo layer, sulfurization temperature, and the temperature of the Mo film. It was determined that crystalline MoS₂ thin films with an optimal thickness of 20 nm can be achieved through sulfurization at 220 °C, while maintaining the Mo thin film at 600 °C. Pressure-dependent hydrogenation of the MoS₂ thin films, as investigated by in-situ XRD, reveals an increase in crystallite size accompanied by a decrease in the relative intensity of the diffraction peaks with rising hydrogen pressure. Furthermore, a microstrain of approximately 6.3% is induced in the MoS₂ films upon exposure to 1% and 10% hydrogen. Notably, the MoS₂ thin films remain predominantly stable up to a hydrogen pressure of 400 mbar; however, they undergo abrupt transformations and become entirely amorphous when the hydrogen gas pressure is subsequently elevated to 800 mbar. These observations of hydrogen-induced crystalline-amorphous phase transformation in MoS₂ not only enhance the understanding of the interactions between MoS₂ and hydrogen but also have critical implications for the application of MoS₂ thin films in various devices.</p></div>","PeriodicalId":473,"journal":{"name":"Applied Physics A","volume":"131 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142798452","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 dual-wavelength selective self-powered photo response of ZnO/Si heterojunction with insertion of thin TiO2 layer","authors":"Rajib Saha,&nbsp;Soumya Mahapatra,&nbsp;Avijit Dalal,&nbsp;Anirudhha Mondal,&nbsp;Subhananda Chakrabarti","doi":"10.1007/s00339-024-08155-6","DOIUrl":"10.1007/s00339-024-08155-6","url":null,"abstract":"<div><p>In the current work, ZnO film (~ 143 nm) is deposited on the CMOS compatible Si substrate by using RF sputtering technique to form a p-n type heterojunction device and further, thin buffer layer of TiO₂ (~ 52 nm) is inserted in between ZnO and Si to reduce the interfacial defects remarkably in ZnO/TiO₂/Si bilayer heterojunction for UV/Visible sensing applications. Smooth interface, and highly crystallite qualities of TiO₂-brookite and ZnO-hexagonal wurtzite phases are observed from atomic force microscopy (AFM) and Field-emission gun scanning electron microscopy (FEG-SEM) and X-ray diffraction (XRD), respectively. X-ray photoelectron spectroscopy (XPS) clarifies the chemical states of elements, which indicate a significant amount of the reduction in oxygen vacancies after insertion of the TiO₂ thin layer. An enhanced absorption in UV region and slight red shift in emission are observed in UV-Visible spectroscopy and Photoluminescence (PL) plots for TiO₂/ZnO bilayer heterojunction, and oxygen related complex defects are reduced due to TiO₂ insertion. Finally, Current-voltage (I-V) measurements demonstrate the dark current reduction in ZnO/Si heterojunction with TiO₂ incorporation and such heterojunction exhibits photovoltaic behavior under specific wavelengths (380 nm and 420 nm). A superior responsivity (0.17 A/W), detectivity (7.80 × 10¹³ Jones) with rapid response speed (&lt; 1 s) at zero bias are achieved in the UV-A/Visible wavelength range for ZnO/TiO₂/Si heterojunctions. The corresponding photo-carrier generation and transport mechanism are analyzed in detail by using corresponding energy band diagram. Therefore, all the results indicate that such TiO₂ thin layer inserted ZnO/Si heterojunction may provide a cost-effective feasible design strategy for the development of interfacial defect less, self-powered wavelength selective UV/Visible detectors in recent future.</p></div>","PeriodicalId":473,"journal":{"name":"Applied Physics A","volume":"131 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142798457","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}