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Time-reversibility and integrability of p:-q resonant vector fields

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arXiv 2022年

作者： Giné, Jaume Romanovski, Valery G. Torregrosa, Joan Departament de Matemàtica Universitat de Lleida Av. Jaume II 69 Catalonia Lleida25001 Spain Faculty of Electrical Engineering and Computer Science University of Maribor Koroška cesta 46 MariborSI-2000 Slovenia Center for Applied Mathematics and Theoretical Physics Mladinska 3 MariborSI-2000 Slovenia Faculty of Natural Science and Mathematics University of Maribor Koroška cesta 160 MariborSI-2000 Slovenia Departament de Matemátiques Universitat Autónoma de Barcelona Bellaterra Catalonia Barcelona08193 Spain

We study local analytical integrability in a neighborhood of p: −q resonant singular point of a two-dimensional vector field and its connection to time-reversibility with respect to the non-smooth involution (x,y) = (yp/q,xq/p). Some generalizations of the theory developed by K. S. Sibirsky for 1: −1 resonant case to the p: −q resonant case are presented. © 2022, CC BY.

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Low Cost Sol Gel Derived Silica-Titania Waveguide Films for Sensing Applications - Characterization

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SSRN

SSRN 2023年

作者： Zięba, Magdalena Tyszkiewicz, Cuma Wojtasik, Katarzyna Pavlov, Krystian Chaber, Pawel Gondek, Ewa Niziol, Jacek Rogoziński, Roman Kielan, Pawel Karasiński, Pawel Silesian University of Technology Department of Optoelectronics ul. B. Krzywoustego 2 Gliwice44-100 Poland Centre for Advanced Materials and Technologies CEZAMAT Warsaw University of Technology Poleczki 19 Warsaw02-822 Poland Centre of Polymer and Carbon Materials Polish Academy of Sciences ul. M. Curie-Sklodowskiej 34 Zabrze41-819 Poland Cracow University of Technology Department of Physics Podchorążych 1 Kraków30-084 Poland AGH University of Science and Technology Faculty of Physics and Applied Computer Science al. Mickiewicza 30 Krakow30-059 Poland Silesian University of Technology Department of Mechatronics ul. Akademicka 10 A Gliwice44-100 Poland

The work involves low-loss waveguide layers for applications in planar evanescent wave sensors. Using the sol-gel method and dip-coating technique, crack-free SiOx:TiOy composite layers with the refractive indices of ∼1.65 in visible spectra range (632.8 nm) were produced. Layers with a thickness of approx. 220-360nm were produced by a single coating of substrates. And by multiple coatings of substrates, SiOx:TiOy composite layers with a thickness of up to 1000 nm were produced. As precursors of silica and titania, tetraethyl orthosilicate and titania (IV) ethoxide were applied, respectively. The produced layers demonstrated good waveguide properties in the Vis spectral range. Using the spectroscopic ellipsometry method, the dispersion characteristics of the refractive index of the developed layers were determined. Spectrophotometric tests validated their optical homogeneity. Using the Tauc method, the widths of optical band gaps were determined, and their high values (Eg>3.7) attest to amorphous nature of the layer material. The FT-IR studies attested to the presence of Si-O-Ti bonds, which are an attribute of amorphous SiOx:TiOy composites. The tests of surface morphology of the SiOx:TiOy layers, using atomic force microscopy, scanning electron microscopy and optical profilometry, confirmed their high smoothness. From the above tests, the root mean square roughness ( © 2023, The Authors. All rights reserved.

关键词： Dip coating

Relative Grain Boundary Energies from Triple Junction Geometry: Limitations to Assuming the Herring Condition in Nanocrystalline Thin Films

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arXiv 2022年

作者： Patrick, Matthew J. Rohrer, Gregory S. Chirayutthanasak, Ooraphan Ratanaphan, Sutatch Homer, Eric R. Hart, Gus L.W. Epshteyn, Yekaterina Barmak, Katayun Department of Applied Physics and Applied Mathematics Columbia University New YorkNY10027 United States Department of Materials Science and Engineering Carnegie-Mellon University PittsburghPA15213 United States Department of Tool and Materials Engineering Faculty of Engineering King Mongkut's University of Technology Thonburi Bangkok10140 Thailand Department of Computer Engineering Faculty of Engineering King Mongkut's University of Technology Thonburi Bangkok10140 Thailand Department of Mechanical Engineering Brigham Young University ProvoUT84602 United States Department of Physics and Astronomy Brigham Young University ProvoUT84602 United States Department of Mathematics University of Utah Salt Lake CityUT84112 United States

Grain boundary character distributions (GBCD) are routinely measured from bulk microcrystalline samples by electron backscatter diffraction (EBSD) and serial sectioning can be used to reconstruct relative grain boundary energy distributions (GBED) based on the 3D geometry of triple lines, assuming that the Herring condition of force balance is satisfied. These GBEDs correlate to those predicted from molecular dynamics (MD);furthermore, the GBCD and GBED are found to be inversely correlated. For nanocrystalline thin films, orientation mapping via precession enhanced electron diffraction (PED) has proven effective in measuring the GBCD, but the GBED has not been extracted. Here, the established relative energy extraction technique is adapted to PED data from four sputter deposited samples: a 40 nm-thick tungsten film and a 100 nm aluminum film as-deposited, after 30 and after 150 minutes annealing at 400°C. These films have columnar grain structures, so serial sectioning is not required to determine boundary inclination. Excepting the most energetically anisotropic and highest population boundaries, i.e. aluminum Σ3 boundaries, the relative GBED extracted from these data do not correlate with energies calculated using MD nor do they inversely correlate with the experimentally determined GBCD for either the tungsten or aluminum films. Failure to reproduce predicted energetic trends implies that the conventional Herring equation cannot be applied to determine relative GBEDs and thus geometries at triple junctions in these films are not well described by this condition;additional geometric factors must contribute to determining triple junction geometry and boundary network structure in spatially constrained, polycrystalline materials. Copyright © 2022, The Authors. All rights reserved.

关键词： Molecular dynamics

Investigation of The Structural Properties of SnO2 Co-doped by (K, Dy) and (K, Sm) Synthesized by The Co-precipitation Method for Photon Conversion

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Investigation of The Structural Properties of SnO2 Co-doped ...

International Renewable and Sustainable Energy Conference (IRSEC)

作者： Najoua Eraza Mohamed Youssef Messous Mohamed Naji Mounia Tahri Materials Science Unit (USM/DERS) National Center for Energy Sciences and Nuclear Techniques-CNESTEN- Rabat Morocco Faculty of Sciences Laboratory of Applied Physics Computer Science and Statistics (LPAIS) Fes Morocco Geochemistry and Chemical Pollution Unit (UGCP/DERS) National Center for Energy Sciences and Nuclear Techniques-CNESTEN- Rabat Morocco

ISBN: (纸本)9781665413206

We report in this work the effect of Dysporsium and Samarium doping and activated by Potassium as charge compensator on the structural properties of SnO 2 nanopowders. The undoped and doped samples (K,Dy: SnO 2 ) and (K,Sm: SnO 2 ) at 3% K and various concentration of Dy and Sm (1%, 3 % and 5 %) ) were synthesized via a coprecipitation *** prepared samples have been characterized by X-ray diffraction and infrared spectroscopy. The peak at 26.59° observed in XRD confirm the formation of a SnO 2 phase in a rutile tetragonal structure with orientation preferences for (110). Rietveld refinement analysis revealed the contraction of lattice parameters due to doping / co-doping, with a particle size range of 12-39 nm determined using Debye Scherrer's formula. Also, the FTIR spectra confirmed the presence of Sn-O and Sn–O–Sn bonds in all the synthesized samples and the transmittance is greater in the SnO 2 (K + , Dy 3+ ) than SnO 2 (K + , Sm 3+ ) in the energy range of (400-4000) cm -1 .

关键词： Nanoparticles Vibrations Renewable energy sources X-ray scattering Powders Lattices Doping

Measurement of the τ lepton polarization in Z boson decays in proton-proton collisions at (Formula presented.)

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Journal of High Energy physics 2024年第1期2024卷 1-54页

作者： Hayrapetyan, A. Tumasyan, A. Adam, W. Andrejkovic, J.W. Bergauer, T. Chatterjee, S. Damanakis, K. Dragicevic, M. Escalante Del Valle, A. Hussain, P.S. Jeitler, M. Krammer, N. Liko, D. Mikulec, I. Schieck, J. Schöfbeck, R. Schwarz, D. Sonawane, M. Templ, S. Waltenberger, W. Wulz, C.-E. Darwish, M.R. Janssen, T. Van Mechelen, P. Bols, E.S. D’Hondt, J. Dansana, S. De Moor, A. Delcourt, M. El Faham, H. Lowette, S. Makarenko, I. Müller, D. Sahasransu, A.R. Tavernier, S. Tytgat, M. Van Putte, S. Vannerom, D. Clerbaux, B. De Lentdecker, G. Favart, L. Hohov, D. Jaramillo, J. Khalilzadeh, A. Lee, K. Mahdavikhorrami, M. Malara, A. Paredes, S. Pétré, L. Postiau, N. Thomas, L. Vanden Bemden, M. Vander Velde, C. Vanlaer, P. De Coen, M. Dobur, D. Hong, Y. Knolle, J. Lambrecht, L. Mestdach, G. Rendón, C. Samalan, A. Skovpen, K. Van Den Bossche, N. Wezenbeek, L. Benecke, A. Bruno, G. Caputo, C. Delaere, C. Donertas, I.S. Giammanco, A. Jaffel, K. Jain, Sa. Lemaitre, V. Lidrych, J. Mastrapasqua, P. Mondal, K. Tran, T.T. Wertz, S. Alves, G.A. Coelho, E. Hensel, C. Menezes De Oliveira, T. Moraes, A. Rebello Teles, P. Soeiro, M. Aldá Júnior, W.L. Alves Gallo Pereira, M. Barroso Ferreira Filho, M. Brandao Malbouisson, H. Carvalho, W. Chinellato, J. Da Costa, E.M. Da Silveira, G.G. De Jesus Damiao, D. Fonseca De Souza, S. Martins, J. Mora Herrera, C. Mota Amarilo, K. Mundim, L. Nogima, H. Santoro, A. Silva Do Amaral, S.M. Sznajder, A. Thiel, M. Vilela Pereira, A. Bernardes, C.A. Calligaris, L. Fernandez Perez Tomei, T.R. Gregores, E.M. Mercadante, P.G. Novaes, S.F. Orzari, B. Padula, Sandra S. Aleksandrov, A. Antchev, G. Hadjiiska, R. Iaydjiev, P. Misheva, M. Shopova, M. Sultanov, G. Dimitrov, A. Ivanov, T. Litov, L. Pavlov, B. Petkov, P. Petrov, A. Shumka, E. Keshri, S. Thakur, S. Cheng, T. Guo, Q. Javaid, T. Mittal, M. Yuan, L. Bauer, G. Hu, Z. Yi, K. Chen, G.M. Chen, H.S. Chen, M. Iemmi, F. Jiang, C.H. Kapoor, A. Liao, H. Liu, Z.-A. Monti, F. Sharma, R. Song, J.N. Tao, J. Wang, C. Wang, J. Wang, Z. Zhang, H. Agapitos, A. Ban, Y. Lev Yerevan Physics Institute Yerevan Armenia Institut für Hochenergiephysik Vienna Austria Universiteit Antwerpen Antwerpen Belgium Vrije Universiteit Brussel Brussel Belgium Université Libre de Bruxelles Bruxelles Belgium Ghent University Ghent Belgium Université Catholique de Louvain Louvain-la-Neuve Belgium Centro Brasileiro de Pesquisas Fisicas Rio de Janeiro Brazil Universidade do Estado do Rio de Janeiro Rio de Janeiro Brazil Universidade Estadual Paulista Universidade Federal do ABC São Paulo Brazil Institute for Nuclear Research and Nuclear Energy Bulgarian Academy of Sciences Sofia Bulgaria University of Sofia Sofia Bulgaria Instituto De Alta Investigación Universidad de Tarapacá Casilla 7 D Arica Chile Beihang University Beijing China Department of Physics Tsinghua University Beijing China Institute of High Energy Physics Beijing China State Key Laboratory of Nuclear Physics and Technology Peking University Beijing China Sun Yat-Sen University Guangzhou China University of Science and Technology of China Hefei China Institute of Modern Physics and Key Laboratory of Nuclear Physics and Ion-beam Application (MOE) — Fudan University Shanghai China Zhejiang University Zhejiang Hangzhou China Universidad de Los Andes Bogota Colombia Universidad de Antioquia Medellin Colombia University of Split Faculty of Electrical Engineering Mechanical Engineering and Naval Architecture Split Croatia University of Split Faculty of Science Split Croatia Institute Rudjer Boskovic Zagreb Croatia University of Cyprus Nicosia Cyprus Charles University Prague Czech Republic Escuela Politecnica Nacional Quito Ecuador Universidad San Francisco de Quito Quito Ecuador Academy of Scientific Research and Technology of the Arab Republic of Egypt Egyptian Network of High Energy Physics Cairo Egypt Center for High Energy Physics (CHEP-FU) Fayoum University El-Fayoum Egypt National Institute of Chemical Physics and Biophysics Tallinn Estonia Department of Physics

The polarization of τ leptons is measured using leptonic and hadronic τ lepton decays in Z → τ+ τ− events in proton-proton collisions at (Formula presented.) recorded by CMS at the CERN LHC with an integrated lum... 详细信息

The polarization of τ leptons is measured using leptonic and hadronic τ lepton decays in Z → τ⁺ τ⁻ events in proton-proton collisions at (Formula presented.) recorded by CMS at the CERN LHC with an integrated luminosity of 36.3 fb⁻¹. The measured τ⁻ lepton polarization at the Z boson mass pole is P_τ(Z) = −0.144 ± 0.006 (stat) ± 0.014 (syst) = −0.144 ± 0.015, in good agreement with the measurement of the τ lepton asymmetry parameter of A_τ = 0.1439 ± 0.0043 = − P_τ(Z) at LEP. The τ lepton polarization depends on the ratio of the vector to axial-vector couplings of the τ leptons in the neutral current expression, and thus on the effective weak mixing angle sin² θWeff , independently of the Z boson production mechanism. The obtained value sin² θWeff = 0.2319 ± 0.0008(stat) ± 0.0018(syst) = 0.2319 ± 0.0019 is in good agreement with measurements at e⁺ e⁻ colliders. [Figure not available: see fulltext.]. © 2024, The Author(s).

关键词： Hadron-Hadron Scattering Tau physics

Angular harmonic Hall voltage and magnetoresistance measurements of Pt/FeCoB and Pt-Ti/FeCoB bilayers for spin Hall conductivity determination

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arXiv 2021年

作者： Skowronski, Witold Grochot, Krzysztof Rzeszut, Piotr Lazarski, Stanislaw Gajoch, Grzegorz Worek, Cezary Kanak, Jaroslaw Stobiecki, Tomasz Langer, Jürgen Ocker, Berthold Vafaee, Mehran AGH University of Science and Technology Institute of Electronics Al. Mickiewicza 30 Kraków30-059 Poland AGH University of Science and Technology Faculty of Physics and Applied Computer Science Al. Mickiewicza 30 Kraków30-059 Poland Singulus Technologies AG Hanauer Landstrasse 103 Kahl am Main63796 Germany

Materials with significant spin-orbit coupling enable efficient spin-to-charge interconversion, which can be utilized in novel spin electronic devices. A number of elements, mainly heavy-metals (HM) have been identified to produce a sizable spin current (js), while supplied with a charge current (j), detected mainly in the neighbouring ferromagnetic (FM) layer. Apart from the spin Hall angle θSH = js/j, spin Hall conductivity (σSH) is an important parameter, which takes also the resistivity of the material into account. In this work, we present a measurement protocol of the HM/FM bilayers, which enables for a precise σSH determination. Static transport measurements, including resistivity and magnetization measurements are accompanied by the angular harmonic Hall voltage analysis in a dedicated low-noise rotating probe station. Dynamic characterization includes effective magnetization and magnetization damping measurement, which enable HM/FM interface absorption calculation. We validate the measurement protocol in Pt and Pt-Ti underlayers in contact with FeCoB and present the σSH of up to 3.3x105 S/m, which exceeds the values typically measured in other HM, such as W or Ta. Copyright © 2021, The Authors. All rights reserved.

关键词： Spin Hall effect

Mössbauer spectroscopic and XRD studies of two η-FeAl intermetallics

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arXiv 2021年

作者： Dubiel, Stanislaw M. Gondek, Lukasz Zienert, Tilo Żukrowski, Jan AGH University of Science and Technology aleja Adama Mickiewicza 30 Kraków30-059 Poland Faculty of Physics and Applied Computer Science Poland Academic Center for Materials and Nanotechnology KrakówPL-30-059 Poland TU Bergakademie Freiberg Institute of Material Science Institute of Ceramics Refractories and Composite Materials FreibergD-09599 Germany

Two intermetallic FeAl compounds with Al content of 70.68 and 72.17 at% were studied using Mössbauer spectroscopy (5–296 K) and X-ray diffraction (15–300 K). The compounds were found to crystallize in the orthorhombic Cmcm space group (η-phase). The collected data revealed that dynamics of the Fe atoms (harmonic in entire temperature range) is significantly different that Al atoms. For the latter strong anharmonicity was evidenced. Moreover, it was found that partial filling of the different Al sites leads to occurrence of low- and high- symmetry coordination of Fe atoms, which was reflected in occurrence of two distinct doublets in Mössbauer spectra. All spectral parameters of the doublets as well as the Debye temperature, force constant, kinetic and potential energies of vibrations were determined. Those results revealed significant differences between both alloys, likely originating from approaching the stability boundary of the η-phase for Fe-Al 72.17 at% alloy. Copyright © 2021, The Authors. All rights reserved.

关键词： Binary alloys

Near-zero-field microwave-free magnetometry with nitrogen-vacancy centers in nanodiamonds

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arXiv 2024年

作者： Dhungel, Omkar Mrózek, Mariusz Lenz, Till Ivády, Viktor Gali, Adam Wickenbrock, Arne Budker, Dmitry Gawlik, Wojciech Wojciechowski, Adam M. Helmholtz-Institut Mainz GSI Helmholtzzentrum für Schwerionenforschung GmbH Mainz55128 Germany Johannes Gutenberg-Universität Mainz Mainz55128 Germany Jagiellonian University Faculty of Physics Astronomy and Applied Computer Science Lojasiewicza St. 11 Krakow30-348 Poland Department of Physics of Complex Systems ELTE Eötvös Loránd University Egyetem tér 1-3 BudapestH-1053 Hungary MTA-ELTE Lendület "Momentum" NewQubit Research Group Pázmány Péter Sétány 1/A Budapest1117 Hungary Department of Physics Chemistry and Biology Linköping University Linköping581 83 Sweden Wigner Research Centre for Physics P.O. Box 49 BudapestH-1525 Hungary Budapest University of Technology and Economics Institute of Physics Department of Atomic Physics Műegyetem rakpart 3. Budapest1111 Hungary MTA-WFK Lendület "Momentum" Semiconductor Nanostructures Research Group P.O. Box 49 BudapestH-1525 Hungary Department of Physics University of California BerkeleyCA94720-300 United States

We study the fluorescence of nanodiamond ensembles as a function of static external magnetic field and observe characteristic dip features close to the zero field with potential for magnetometry applications. We analyze the dependence of the feature's width and the contrast of the feature on the size of the diamond (in the range 30 nm-3000 nm) and on the strength of a bias magnetic field applied transversely to the field being scanned. We also perform optically detected magnetic resonance (ODMR) measurements to quantify the strain splitting of the zero-field ODMR resonance across various nanodiamond sizes and compare it with the width and contrast measurements of the zero-field fluorescence features for both nanodiamonds and bulk samples. The observed properties provide compelling evidence of cross-relaxation effects in the NV system occurring close to zero magnetic fields. Finally, the potential of this technique for use in practical magnetometry is discussed. © 2024, CC BY-NC-ND.

关键词： Magnetometry

Population of tetraneutron continuum in reactions of 8He on deuterium

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arXiv 2023年

作者： Muzalevskii, I.A. Shulgina, N.B. Bezbakh, A.A. Chudoba, V. Krupko, S.A. Belogurov, S.G. Biare, D. Egorova, I.A. Fomichev, A.S. Gazeeva, E.M. Gorshkov, A.V. Grigorenko, L.V. Kaminski, G. Khirk, M. Kiselev, O. Kostyleva, D.A. Kozlov, M.Yu. Mauyey, B. Mukha, I. Nikolskii, E.Yu. Parfenova, Yu.L. Piatek, W. Quynh, A.M. Serikov, A. Sidorchuk, S.I. Sharov, P.G. Slepnev, R.S. Stepantsov, S.V. Swiercz, A. Szymkiewicz, P. Ter-Akopian, G.M. Zalewski, B. Flerov Laboratory of Nuclear Reactions JINR Dubna141980 Russia National Research Centre "Kurchatov Institute" Kurchatov Sq. 1 Moscow123182 Russia Bogoliubov Laboratory of Theoretical Physics JINR Dubna141980 Russia Institute of Physics Silesian University in Opava Opava74601 Czech Republic National Research Nuclear University "MEPhI" Moscow115409 Russia Dubna State University Dubna141982 Russia Heavy Ion Laboratory University of Warsaw Warsaw02-093 Poland Skobeltsyn Institute of Nuclear Physics Moscow State University Moscow119991 Russia GSI Helmholtzzentrum für Schwerionenforschung GmbH Darmstadt64291 Germany II. Physikalisches Institut Justus-Liebig-Universität Giessen35392 Germany Laboratory of Information Technologies JINR Dubna141980 Russia Institute of Nuclear Physics Almaty050032 Kazakhstan Nuclear Research Institute Dalat670000 Viet Nam AGH University of Science and Technology Faculty of Physics and Applied Computer Science Krakow30-059 Poland

Search for the population of the low-energy continuum of a tetraneutron system was performed for reactions of the 8He beam on a deuterium target. These studies are based on the data [I.A. Muzalevskii et al., Phys. Rev. C 103, 044313 (2021)], previously used for the studies of 7H and 6H in the 2H(8He, 3He)7H and 2H(8He, 4He)6H reactions. Evidence for a hump in the 4n continuum at 3.5±0.7 and 3.2±0.8 MeV was observed in the 2H(8He,6Li)4n and 2H(8He,3He)7H→3H+4n reactions, respectively. The observed statistics is quite low (6 events and up to 40 events) corresponding to very low cross sections of few microbarns or tens of microbarns. The background conditions for the 2H(8He,6Li)4n reaction are shown to be good, favoring the physical nature of the observed events. The 2H(8He,3He)7H→3H+4n process transforms to the 2H(8He,6Li∗)4n reaction in the limit of the highest 7H decay energies. The population of the low-energy region in the 4n spectrum is found to be perfectly correlated with the population of the lowest 6Li state in the 3He+3H continuum with E∗ = 18 MeV. Theoretical calculations of 8He in a five-body α+4n and of 4n in a four-body hyperspherical models are presented. The 8He wave function is shown to contain strong specific correlations, which may give rise to very low-energy structures in tetraneutron continuum in extreme-peripheral reaction scenarios. Copyright © 2023, The Authors. All rights reserved.

关键词： Continuum mechanics