检索结果-内蒙古大学图书馆

arXiv 2021年

作者： Gao, Anyuan Liu, Yu-Fei Hu, Chaowei Qiu, Jian-Xiang Tzschaschel, Christian Ghosh, Barun Ho, Sheng-Chin Bérubé, Damien Chen, Rui Sun, Haipeng Zhang, Zhaowei Zhang, Xin-Yue Wang, Yu-Xuan Wang, Naizhou Huang, Zumeng Felser, Claudia Agarwal, Amit Ding, Thomas Tien, Hung-Ju Akey, Austin Gardener, Jules Singh, Bahadur Watanabe, Kenji Taniguchi, Takashi Burch, Kenneth S. Bell, David C. Zhou, Brian B. Gao, Weibo Lu, Hai-Zhou Bansil, Arun Lin, Hsin Chang, Tay-Rong Fu, Liang Ma, Qiong Ni, Ni Xu, Su-Yang Department of Chemistry and Chemical Biology Harvard University MA02138 United States Department of Physics and Astronomy California NanoSystems Institute University of California Los Angeles Los AngelesCA90095 United States Department of Physics Indian Institute of Technology Kanpur India Department of Physics Northeastern University BostonMA02115 United States Shenzhen518055 China Division of Physics and Applied Physics School of Physical and Mathematical Sciences Nanyang Technological University Singapore637371 Singapore Department of Physics Boston College Chestnut HillMA United States Max Planck Institute for Chemical Physics of Solids Nöthnitzer Straße 40 Dresden01187 Germany Department of Physics National Cheng Kung University Tainan701 Taiwan Center for Nanoscale Systems Harvard University CambridgeMA02138 United States Department of Condensed Matter Physics and Materials Science Tata Institute of Fundamental Research Mumbai Colaba400005 India Research Center for Functional Materials National Institute for Materials Science 1-1 Namiki Tsukuba305-0044 Japan International Center for Materials Nanoarchitectonics National Institute for Materials Science 1-1 Namiki Tsukuba305-0044 Japan Harvard John A. Paulson School of Engineering and Applied Sciences Harvard University CambridgeMA02138 United States Institute of Physics Academia Sinica Taipei11529 Taiwan Tainan701 Taiwan Physics Division National Center for Theoretical Sciences National Taiwan University Taipei Taiwan Department of Physics Massachusetts Institute of Technology CambridgeMA02139 United States

While ferromagnets have been known and exploited for millennia, antiferromagnets (AFMs) were only discovered in the 1930s [1]. The elusive nature indicates AFMs’ unique properties: At large scale, due to the absence of global magnetization, AFMs may appear to behave like any non-magnetic material;However, such a seemingly mundane macroscopic magnetic property is highly nontrivial at microscopic level, where opposite spin alignment within the AFM unit cell forms a rich internal structure. In topological AFMs, such an internal structure leads to a new possibility, where topology and Berry phase can acquire distinct spatial textures [2, 3]. Here, we study this exciting possibility in an AFM Axion insulator, even-layered MnBi2Te4 flakes, where spatial degrees of freedom correspond to different layers. Remarkably, we report the observation of a new type of Hall effect, the layer Hall effect, where electrons from the top and bottom layers spontaneously deflect in opposite directions. Specifically, under no net electric field, even-layered MnBi2Te4 shows no anomalous Hall effect (AHE);However, applying an electric field isolates the response from one layer and leads to the surprising emergence of a large layer-polarized AHE (∼ 50%eh2 ). Such a layer Hall effect uncovers a highly rare layer-locked Berry curvature, which serves as a unique character of the space-time PT -symmetric AFM topological insulator state. Moreover, we found that the layer-locked Berry curvature can be manipulated by the Axion field, E · B, which drives the system between the opposite AFM states. Our results achieve previously unavailable pathways to detect and manipulate the rich internal spatial structure of fully-compensated topological AFMs [4–12]. The layer-locked Berry curvature represents a first step towards spatial engineering of Berry phase, such as through layer-specific moiré potential. Copyright © 2021, The Authors. All rights reserved.

关键词： Antiferromagnetic materials

来源：评论

学校读者我要写书评

暂无评论

Play. Pause. Rewind. Measuring local entropy production and extractable work in active matter

arXiv

引用

arXiv 2021年

作者： Ro, Sunghan Guo, Buming Shih, Aaron Phan, Trung V. Austin, Robert H. Levine, Dov Chaikin, Paul M. Martiniani, Stefano Department of Physics Technion-Israel Institute of Technology Haifa3200003 Israel Center for Soft Matter Research Department of Physics New York University New York10003 United States Courant Institute of Mathematical Sciences New York University New York10003 United States Department of Chemical Engineering and Materials Science University of Minnesota MinneapolisMN55455 United States Department of Physics Princeton University Princeton NJ08544 United States Simons Center for Computational Physical Chemistry Department of Chemistry New York University New York10003 United States

Time-reversal symmetry breaking and entropy production are universal features of nonequilibrium phenomena. Despite its importance in the physics of active and living systems, the entropy production of systems with many degrees of freedom has remained of little practical significance because the high-dimensionality of their state space makes it difficult to measure. Here we introduce a local measure of entropy production and a numerical protocol to estimate it. We establish a connection between the entropy production and extractability of work in a given region of the system and show how this quantity depends crucially on the degrees of freedom being tracked. We validate our approach in theory, simulation, and experiments by considering systems of active Brownian particles undergoing motility induced phase separation, as well as active Brownian particles and E. Coli in a rectifying device in which the time-reversal asymmetry of the particle dynamics couples to spatial asymmetry to reveal its effects on a macroscopic scale. Copyright © 2021, The Authors. All rights reserved.

关键词： Entropy

来源：评论

学校读者我要写书评

暂无评论

The Real Time Analysis framework of the Cherenkov Telescope Array's Large-Sized Telescope

arXiv

引用

arXiv 2023年

作者： Caroff, Sami Aubert, Pierre Garcia, Enrique Maurin, Gilles Pollet, Vincent Vuillaume, Thomas Abe, K. Abe, S. Aguasca-Cabot, A. Agudo, I. Alvarez Crespo, N. Antonelli, L.A. Aramo, C. Arbet-Engels, A. Arcaro, C. Artero, M. Asano, K. Baktash, A. Bamba, A. Baquero Larriva, A. Baroncelli, L. Barres de Almeida, U. Barrio, J.A. Batkovic, I. Baxter, J. Becerra González, J. Bernardini, E. Bernardos, M.I. Bernete Medrano, J. Berti, A. Bhattacharjee, P. Biederbeck, N. Bigongiari, C. Bissaldi, E. Blanch, O. Bonnoli, G. Bordas, P. Bulgarelli, A. Burelli, I. Burmistrov, L. Buscemi, M. Cardillo, M. Carosi, A. Carrasco, M.S. Cassol, F. Cauz, D. Cerasole, D. Ceribella, G. Chai, Y. Cheng, K. Chiavassa, A. Chikawa, M. Chytka, L. Cifuentes, A. Contreras, J.L. Cortina, J. Costantini, H. Dalchenko, M. Dazzi, F. De Angelis, A. de Bony de Lavergne, M. De Lotto, B. De Lucia, M. de Menezes, R. Del Peral, L. Deleglise, G. Delgado, C. Delgado Mengual, J. della Volpe, D. Dellaiera, M. Di Piano, A. Di Pierro, F. Di Pilato, A. Di Tria, R. Di Venere, L. Díaz, C. Dominik, R.M. Dominis Prester, D. Donini, A. Dorner, D. Doro, M. Eisenberger, L. Elsässer, D. Emery, G. Escudero, J. Fallah Ramazani, V. Ferrara, G. Ferrarotto, F. Fiasson, A. Foffano, L. Freixas Coromina, L. Fröse, S. Fukami, S. Fukazawa, Y. Garcia López, R. Gasbarra, C. Gasparrini, D. Geyer, D. Giesbrecht Paiva, J. Giglietto, N. Giordano, F. Gliwny, P. Godinovic, N. Grau, R. Green, J. Green, D. Gunji, S. Günther, P. Hackfeld, J. Hadasch, D. Hahn, A. Hashiyama, K. Hassan, T. Hayashi, K. Heckmann, L. Heller, M. Herrera Llorente, J. Hirotani, K. Hoffmann, D. Horns, D. Houles, J. Hrabovsky, M. Hrupec, D. Hui, D. Hütten, M. Iarlori, M. Imazawa, R. Inada, T. Inome, Y. Ioka, K. Iori, M. Ishio, K. Jimenez Martinez, I. Jurysek, J. Kagaya, M. Karas, V. Katagiri, H. Kataoka, J. Kerszberg, D. Kobayashi, Y. Kohri, K. Kong, A. Kubo, H. Kushida, J. Lainez, M. Lamanna, G. Lamastra, A. Le Flour, T. Linhoff, M. Longo, F. López-Coto, R. López-Oramas, A. Univ. Savoie Mont Blanc CNRS Laboratoire d'Annecy de Physique des Particules - IN2P3 Annecy74000 France Department of Physics Tokai University Japan Institute for Cosmic Ray Research University of Tokyo Japan Departament de Física Quàntica i Astrofísica Institut de Ciències del Cosmos Universitat de Barcelona IEEC-UB Spain Instituto de Astrofísica de Andalucía-CSIC Spain EMFTEL department IPARCOS Universidad Complutense de Madrid Spain INAF - Osservatorio Astronomico di Roma Italy INFN Sezione di Napoli Italy Max-Planck-Institut für Physik Germany INFN Sezione di Padova Università degli Studi di Padova Italy The Barcelona Institute of Science and Technology Spain Universität Hamburg Institut für Experimentalphysik Germany Graduate School of Science University of Tokyo Japan Universidad del Azuay Ecuador INAF - Osservatorio di Astrofisica e Scienza dello spazio di Bologna Italy Centro Brasileiro de Pesquisas Físicas Brazil Instituto de Astrofísica de Canarias Departamento de Astrofísica Universidad de La Laguna Spain CIEMAT Spain Department of Physics TU Dortmund University Germany INFN Sezione di Bari Politecnico di Bari Italy INAF - Osservatorio Astronomico di Brera Italy INFN Sezione di Trieste Università degli Studi di Udine Italy University of Geneva Département de physique nucléaire et corpusculaire Switzerland INFN Sezione di Catania Italy Italy Aix Marseille Univ CNRS IN2P3 CPPM France INFN Sezione di Bari Università di Bari Italy INFN Sezione di Torino Italy Palacky University Olomouc Faculty of Science Czech Republic University of Alcalá UAH Spain Port d'Informació Científica Spain University of Rijeka Department of Physics Croatia Institute for Theoretical Physics and Astrophysics Universität Würzburg Germany Institut für Theoretische Physik Lehrstuhl IV: Plasma-Astroteilchenphysik Ruhr-Universität Bochum Germany INFN Sezione di Roma La Sapienza Italy ILANCE CNRS Japan Physics Program Graduate School of Advanced Science and Engineerin

The Large-Sized Telescopes (LSTs) of the Cherenkov Telescope Array Observatory (CTAO) will play a crucial role in the study of transient gamma-ray sources, such as gamma-ray bursts and flaring active galactic nuclei. The low energy threshold of LSTs makes them particularly well suited for the detection of these phenomena. The ability to detect and analyze gamma-ray transients in real-time is essential for quickly identifying and studying these rare and fleeting events. In this conference, we will present recent advances in the real-time analysis of data from the LST-1, the first prototype of LST located in the Canary island of La Palma. We will discuss in particular the development of new algorithms for event reconstruction and background rejection. These advances will enable rapid identification and follow-up observation of transient gamma-ray sources, making the LST-1 a powerful tool for the study of the dynamic universe. The implementation of this framework in the future Array Control and Data Acquisition System (ACADA) of CTAO will be discussed as well, based on the experience with LST. © 2023, CC BY.

关键词： Telescopes

来源：评论

学校读者我要写书评

暂无评论

Imaging Atmospheric Cherenkov Telescopes pointing determination using the trajectories of the stars in the field of view

arXiv

引用

arXiv 2023年

作者： Abe, K. Abe, S. Aguasca-Cabot, A. Agudo, I. Alvarez Crespo, N. Antonelli, L.A. Aramo, C. Arbet-Engels, A. Arcaro, C. Artero, M. Asano, K. Aubert, P. Baktash, A. Bamba, A. Baquero Larriva, A. Baroncelli, L. Barres de Almeida, U. Barrio, J.A. Batkovic, I. Baxter, J. Becerra González, J. Bernardini, E. Bernardos, M.I. Bernete Medrano, J. Berti, A. Bhattacharjee, P. Biederbeck, N. Bigongiari, C. Bissaldi, E. Blanch, O. Bonnoli, G. Bordas, P. Bulgarelli, A. Burelli, I. Burmistrov, L. Buscemi, M. Cardillo, M. Caroff, S. Carosi, A. Carrasco, M.S. Cassol, F. Cauz, D. Cerasole, D. Ceribella, G. Chai, Y. Cheng, K. Chiavassa, A. Chikawa, M. Chytka, L. Cifuentes, A. Contreras, J.L. Cortina, J. Costantini, H. Dalchenko, Mykhailo Dazzi, F. De Angelis, A. de Bony de Lavergne, M. De Lotto, B. De Lucia, M. de Menezes, R. Del Peral, L. Deleglise, G. Delgado, C. Delgado Mengual, J. della Volpe, D. Dellaiera, M. Di Piano, A. Di Pierro, F. Di Pilato, A. Di Tria, R. Di Venere, L. Díaz, C. Dominik, R.M. Dominis Prester, D. Donini, A. Dorner, D. Doro, M. Eisenberger, L. Elsässer, D. Emery, G. Escudero, J. Fallah Ramazani, V. Ferrara, G. Ferrarotto, F. Fiasson, A. Foffano, L. Freixas Coromina, L. Fröse, S. Fukami, S. Fukazawa, Y. Garcia, E. Garcia López, R. Gasbarra, C. Gasparrini, D. Geyer, D. Giesbrecht Paiva, J. Giglietto, N. Giordano, F. Gliwny, P. Godinovic, N. Grau, R. Green, J. Green, D. Gunji, S. Günther, P. Hackfeld, J. Hadasch, D. Hahn, A. Hashiyama, K. Hassan, T. Hayashi, K. Heckmann, L. Heller, Matthieu Herrera Llorente, J. Hirotani, K. Hoffmann, D. Horns, D. Houles, J. Hrabovsky, M. Hrupec, D. Hui, D. Hütten, M. Iarlori, M. Imazawa, R. Inada, T. Inome, Y. Ioka, K. Iori, M. Ishio, K. Jimenez Martinez, I. Jurysek, J. Kagaya, M. Karas, V. Katagiri, H. Kataoka, J. Kerszberg, D. Kobayashi, Y. Kohri, K. Kong, A. Kubo, H. Kushida, J. Lainez, M. Lamanna, G. Lamastra, A. Le Flour, T. Linhoff, M. Longo, F. López-Coto, R. López-Oramas, A. Loporchio, S. Lorini, A. Lozano Bahilo, J. Department of Physics Tokai University Japan Institute for Cosmic Ray Research University of Tokyo Japan Departament de Física Quàntica i Astrofísica Institut de Ciències del Cosmos Universitat de Barcelona IEEC-UB Spain Instituto de Astrofísica de Andalucía-CSIC Spain EMFTEL department and IPARCOS Universidad Complutense de Madrid Spain INAF - Osservatorio Astronomico di Roma Italy INFN Sezione di Napoli Italy Max-Planck-Institut für Physik Germany INFN Sezione di Padova Università degli Studi di Padova Italy The Barcelona Institute of Science and Technology Spain LAPP Univ. Grenoble Alpes Univ. Savoie Mont Blanc CNRS-IN2P3 Annecy France Universität Hamburg Institut für Experimentalphysik Germany Graduate School of Science University of Tokyo Japan Universidad del Azuay Ecuador INAF - Osservatorio di Astrofisica e Scienza dello Spazio di Bologna Italy Centro Brasileiro de Pesquisas Físicas Brazil Instituto de Astrofísica de Canarias Departamento de Astrofísica Universidad de La Laguna Spain CIEMAT Spain Department of Physics TU Dortmund University Germany INFN Sezione di Bari Politecnico di Bari Italy INAF - Osservatorio Astronomico di Brera Italy INFN Sezione di Trieste Università degli Studi di Udine Italy University of Geneva Département de Physique Nucléaire et Corpusculaire 24 quai Ernest-Ansermet Genève Switzerland INFN Sezione di Catania Italy Italy Aix Marseille Univ CNRS IN2P3 CPPM France INFN Sezione di Bari Università di Bari Italy INFN Sezione di Torino Italy Palacky University Olomouc Faculty of Science Czech Republic University of Alcalá UAH Spain Port d'Informació Científica Spain University of Rijeka Department of Physics Croatia Institute for Theoretical Physics and Astrophysics Universität Würzburg Germany Institut für Theoretische Physik Lehrstuhl IV: Plasma-Astroteilchenphysik Ruhr-Universität Bochum Germany INFN Sezione di Roma La Sapienza Italy ILANCE CNRS France Physics Program Graduate School of Advanced Science and E

We present a new approach to the pointing determination of Imaging Atmospheric Cherenkov Telescopes (IACTs). This method is universal and can be applied to any IACT with minor modifications. It uses the trajectories of the stars in the field of view of the IACT's main camera and requires neither dedicated auxiliary hardware nor a specific data taking mode. The method consists of two parts: firstly, we reconstruct individual star positions as a function of time, taking into account the point spread function of the telescope;secondly, we perform a simultaneous fit of all reconstructed star trajectories using the orthogonal distance regression method. The method does not assume any particular star trajectories, does not require a long integration time, and can be applied to any IACT observation mode. The performance of the method is assessed with commissioning data of the Large-Sized Telescope prototype (LST-1), showing the method's stability and remarkable pointing performance of the LST-1 telescope. © 2023, CC BY-NC-ND.

关键词： Trajectories

来源：评论

学校读者我要写书评

暂无评论

High resolution spectroscopy of neutral Yb atoms in a solid ne matrix

arXiv

引用

arXiv 2021年

作者： Lambo, R. Xu, C.-Y. Pratt, S.T. Xu, H. Zappala, J.C. Bailey, K.G. Lu, Z.-T. Mueller, P. O'Connor, T.P. Kamorzin, B.B. Bezrukov, D.S. Xie, Y. Buchachenko, A.A. Singh, J.T. Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences Shenzhen518055 China Physics Division Argonne National Laboratory ArgonneIL60439 United States Department of Physics and Enrico Fermi Institute University of Chicago ChicagoIL60637 United States Chemical Science and Engineering Division Argonne National Laboratory LemontIL60439 United States Hefei National Laboratory for Physical Sciences at the Microscale CAS Center for Excellence in Quantum Information and Quantum Physics University of Science and Technology of China 96 Jinzhai Road Hefei230026 China CEST Skolkovo Institute of Science and Technology Skolkovo Innovation Center Moscow121205 Russia Department of Chemistry M.V. Lomonosov Moscow State University Moscow119991 Russia National Superconducting Cyclotron Laboratory Michigan State University East LansingMI48824 United States

We present an experimental and theoretical study of the absorption and emission spectra of Yb atoms in a solid Ne matrix at a resolution of 0.025 nm. Five absorption bands were identified as due to transitions from the 4f145d06s21S0 ground state configuration to 4f145d06s6p and 4f135d16s2configurations. The two lowest energy bands were assigned to outer-shell transitions to 6s6p 3P1 and 1P1 atomic states and displayed the structure of a broad doublet and an asymmetric triplet, respectively. The remaining three higher-frequency bands were assigned to inner-shell transitions to distinct J = 1 states arising from the 4f135d16s2configuration and were highly structured with narrow linewidths. A classical simulation was performed to identify the stability and symmetry of possible trapping sites in the Ne crystal. It showed that the overarching 1+2 structure of the high frequency bands could be predominantly ascribed to crystal field splitting in the axial field of a 10-atom vacancy of C4v symmetry. Their prominent substructures were shown to be manifestations of phonon sidebands associated with the zero-phonon lines on each crystal field state. Unprecedented for a metal-rare gas system, resolution of individual phonon states on an allowed electronic transition was possible under excitation spectroscopy which reflects the semi-quantum nature of solid Ne. In contrast to the absorption spectra, emission spectra produced by steady-state excitation into the 1P1 absorption band consisted of simple, unstructured fluorescence bands. Copyright © 2021, The Authors. All rights reserved.

关键词： Atoms

来源：评论

学校读者我要写书评

暂无评论

Performance of the Large-Sized Telescope prototype of the Cherenkov Telescope Array

arXiv

引用

arXiv 2023年

作者： Abe, K. Abe, S. Aguasca-Cabot, A. Agudo, I. Alvarez Crespo, N. Antonelli, L.A. Aramo, C. Arbet-Engels, A. Arcaro, C. Artero, M. Asano, K. Aubert, P. Baktash, A. Bamba, A. Baquero Larriva, A. Baroncelli, L. Barres de Almeida, U. Barrio, J.A. Batkovic, I. Baxter, J. Becerra González, J. Bernardini, E. Bernardos, M.I. Bernete Medrano, J. Berti, A. Bhattacharjee, P. Biederbeck, N. Bigongiari, C. Bissaldi, E. Blanch, O. Bonnoli, G. Bordas, P. Bulgarelli, A. Burelli, I. Burmistrov, L. Buscemi, M. Cardillo, M. Caroff, S. Carosi, A. Carrasco, M.S. Cassol, F. Cauz, D. Cerasole, D. Ceribella, G. Chai, Y. Cheng, K. Chiavassa, A. Chikawa, M. Chytka, L. Cifuentes, A. Contreras, J.L. Cortina, J. Costantini, H. Dalchenko, M. Dazzi, F. De Angelis, A. de Bony de Lavergne, M. De Lotto, B. De Lucia, M. de Menezes, R. Del Peral, L. Deleglise, G. Delgado, C. Delgado Mengual, J. della Volpe, D. Dellaiera, M. Di Piano, A. Di Pierro, F. Di Pilato, A. Di Tria, R. Di Venere, L. Díaz, C. Dominik, R.M. Dominis Prester, D. Donini, A. Dorner, D. Doro, M. Eisenberger, L. Elsässer, D. Emery, G. Escudero, J. Fallah Ramazani, V. Ferrara, G. Ferrarotto, F. Fiasson, A. Foffano, L. Freixas Coromina, L. Fröse, S. Fukami, S. Fukazawa, Y. Garcia, E. Garcia López, R. Gasbarra, C. Gasparrini, D. Geyer, D. Giesbrecht Paiva, J. Giglietto, N. Giordano, F. Gliwny, P. Godinovic, N. Grau, R. Green, J. Green, D. Gunji, S. Günther, P. Hackfeld, J. Hadasch, D. Hahn, A. Hashiyama, K. Hassan, T. Hayashi, K. Heckmann, L. Heller, M. Herrera Llorente, J. Hirotani, K. Hoffmann, D. Horns, D. Houles, J. Hrabovsky, M. Hrupec, D. Hui, D. Hütten, M. Iarlori, M. Imazawa, R. Inada, T. Inome, Y. Ioka, K. Iori, M. Ishio, K. Jimenez Martinez, I. Jurysek, J. Kagaya, M. Karas, V. Katagiri, H. Kataoka, J. Kerszberg, D. Kobayashi, Y. Kohri, K. Kong, A. Kubo, H. Kushida, J. Lainez, M. Lamanna, G. Lamastra, A. Le Flour, T. Linhoff, M. Longo, F. López-Coto, R. López-Oramas, A. Loporchio, S. Lorini, A. Lozano Bahilo, J. Luque-Escamilla, P.L. Department of Physics Tokai University Japan Institute for Cosmic Ray Research University of Tokyo Japan Departament de Física Quàntica i Astrofísica Institut de Ciències del Cosmos Universitat de Barcelona IEEC-UB Spain Instituto de Astrofísica de Andalucía-CSIC Glorieta de la Astronomía s/n Granada18008 Spain IPARCOS-UCM Instituto de Física de Partículas y del Cosmos EMFTEL Department Universidad Complutense de Madrid MadridE-28040 Spain INAF - Osservatorio Astronomico di Roma Italy INFN Sezione di Napoli Italy Max-Planck-Institut für Physik Föhringer Ring 6 München80805 Germany INFN Sezione di Padova Università degli Studi di Padova Italy The Barcelona Institute of Science and Technology Campus UAB Bellaterra Barcelona08193 Spain Univ. Savoie Mont Blanc CNRS Laboratoire d'Annecy de Physique des Particules - IN2P3 Annecy74000 France Universität Hamburg Institut für Experimentalphysik Germany Graduate School of Science University of Tokyo Japan Universidad del Azuay Ecuador INAF - Osservatorio di Astrofisica e Scienza dello spazio di Bologna Italy Centro Brasileiro de Pesquisas Físicas Brazil Instituto de Astrofísica de Canarias Departamento de Astrofísica Universidad de La Laguna Spain CIEMAT Spain Department of Physics TU Dortmund University Germany INFN Sezione di Bari Politecnico di Bari Italy INAF - Osservatorio Astronomico di Brera Italy INFN Sezione di Trieste Università degli Studi di Udine Italy University of Geneva Département de Physique Nucléaire et Corpusculaire Switzerland INFN Sezione di Catania Italy Italy Aix Marseille Univ CNRS IN2P3 CPPM France INFN Sezione di Bari Università di Bari Italy INFN Sezione di Torino Italy Palacky University Olomouc Faculty of Science Czech Republic University of Alcalá UAH Spain Port d'Informació Científica Spain University of Rijeka Department of Physics Croatia Institute for Theoretical Physics and Astrophysics Universität Würzburg Germany Institut für Theoretische Physik Lehrstuhl IV:

The next-generation ground-based gamma-ray Cherenkov Telescope Array Observatory (CTAO) will consist of imaging atmospheric Cherenkov telescopes (IACTs) of three different sizes distributed in two sites. The Large-Sized Telescopes will cover the low-energy end of the CTA energy range, starting at about 20 GeV. After its first years of operation at the CTA northern site, the Large-Sized Telescope prototype (LST-1) is in the final stage of its commissioning phase, having collected a significant amount of scientific data to date. In this contribution, we present the physics performance of the telescope using low-zenith Crab Nebula observations and Monte Carlo simulations fine-tuned accordingly. We show performance figures of merit such as the energy threshold, effective area, energy and angular resolution, and sensitivity based on the standard Hillas-parameters approach and following the source-independent and dependent analysis methods. The analysis threshold is estimated at 30 GeV. The energy resolution is around 30%, and the angular resolution is 0.3 degrees at 100 GeV. The best integral sensitivity of LST-1 is about 1.1% of the Crab Nebula flux above 250 GeV for 50 hours of observations. We also show the spectral energy distribution and light curve from Crab Nebula observations, which agree with results from other IACTs and link smoothly with Fermi-LAT when considering statistical and systematic uncertainties near the energy threshold. © 2023, CC BY-NC-ND.

关键词： Telescopes

来源：评论

学校读者我要写书评

暂无评论

Metal and metal oxide nanoparticles combined with ionic liquids and deep eutectic solvents and their practices in drug extraction and environmental processes: A review

引用

Journal of Molecular Liquids 2025年 422卷

作者： El Messaoudi, Noureddine Aydın, Funda Miyah, Youssef Fernine, Yasmine Georgin, Jordana Wasilewska, Malgorzata Benjelloun, Mohammed Graba, Besma Knani, Salah Laboratory of Applied Chemistry and Environment Faculty of Sciences Ibn Zohr University Agadir80000 Morocco Faculty of Pharmacy Department of Basic Sciences Van Yüzüncü Yıl University Van65080 Turkey Ministry of Health and Social Protection Higher Institute of Nursing Professions and Health Techniques Fez Morocco Laboratory of Materials Processes Catalysis and Environment Higher School of Technology University Sidi Mohamed Ben Abdellah Fez Morocco Engineering Laboratory of Organometallic Molecular Materials and Environment Sidi Mohamed Ben Abdellah University Fez30000 Morocco Department of Civil and Environmental Universidad de la Costa CUC Calle 58 # 55-66 Atlántico Barranquilla Colombia Department of Physical Chemistry Institute of Chemical Sciences Faculty of Chemistry Maria Curie-Sklodowska University in Lublin Maria Curie-Sklodowska Sq. 3 Lublin20-031 Poland Department of Physics College of Science Northern Border University Arar Saudi Arabia Center for Scientific Research and Entrepreneurship Northern Border University Arar73213 Saudi Arabia

The integration of nanoparticles (NPs), either of metals or their oxides, with ionic liquids (ILs) and deep eutectic solvents (DESs) has become a revolutionary approach to drug extraction and environmental remediation. The review is focused on the synergistic interactions of NPs and ILs/DESs, pointing out their high performance in the extraction process due to their unique physicochemical properties. The use of ILs and DESs provides tuned solubility, and selectivity in extraction, while NPs have high surface area, catalytic potential, and functional versatility. Attention is given to the current key developments of extraction methods, their applications in both pharmaceutical and environmental contexts are critically analyzed with a view to efficiency, scalability, and sustainability. Comparative discussion is presented regarding the use of ILs/ DESs concerning conventional solvents, toxicology reduction, reusability of solvent, and diminution of environmental impact. The review discusses several challenges with nanoparticle agglomeration, the stability of ILs/DESs under variable conditions, and regulatory issues. It also points out lacunae in knowledge and future directions, including advanced characterization techniques and molecular dynamics simulations for the optimization of such hybrid systems. This work therefore underlines the potentiality of NP-IL/DES systems as sustainable high-performance solutions for drug extraction and environmental applications. © 2025 Elsevier B.V.

关键词： Nanoclay

来源：评论

学校读者我要写书评

暂无评论

Fermi liquid behavior and colossal magnetoresistance in layered MoOCl2

引用

physical Review Materials 2020年第4期4卷 041001(R)-041001(R)页

作者： Zhi Wang Meng Huang Jianzhou Zhao Cong Chen Haoliang Huang Xiangqi Wang Ping Liu Jianlin Wang Junxiang Xiang Chao Feng Zengming Zhang Xudong Cui Yalin Lu Shengyuan A. Yang Bin Xiang Hefei National Research Center for Physical Sciences at the Microscale Department of Materials Science & Engineering CAS Key Lab of Materials for Energy Conversion University of Science and Technology of China Hefei Anhui 230026 China Research Laboratory for Quantum Materials Singapore University of Technology and Design Singapore 487372 Singapore National Synchrotron Radiation Laboratory CAS Center for Excellence in Nanoscience University of Science and Technology of China Hefei Anhui 230026 China Department of Physics University of Science and Technology of China Hefei Anhui 230026 China The Centre for Physical Experiments University of Science and Technology of China Hefei Anhui 230026 China Sichuan New Materials Research Center Institute of Chemical Materials CAEP Chengdu Sichuan 610200 China

A characteristic of a Fermi liquid is the T2 dependence of its resistivity, sometimes referred to as the Baber law. However, for most metals, this behavior is only restricted to very low temperatures, usually below 20 K. Here, we experimentally demonstrate that for the single-crystal van der Waals layered material MoOCl2, the Baber law holds in a wide temperature range up to ∼120 K, indicating that the electron-electron scattering plays a dominant role in this material. Combining with the specific heat measurement, we find that the modified Kadowaki-Woods ratio of the material agrees well with many other strongly correlated metals. Furthermore, in the magnetotransport measurement, a colossal magnetoresistance is observed, which reaches ∼350% at 9 T and displays no sign of saturation. With the help of first-principles calculations, we attribute this behavior to the presence of open orbits on the Fermi surface. We also suggest that the dominance of electron-electron scattering is related to an incipient charge density wave state of the material. Our results establish MoOCl2 as a strongly correlated metal and shed light on the underlying physical mechanism, which may open a new path for exploring the effects of electron-electron interaction in van der Waals layered structures.

关键词： Colossal magnetoresistance Electrical properties Electronic structure First-principles calculations

来源：评论

学校读者我要写书评

暂无评论

Deep-Level Transient Spectroscopy for Effective Passivator Selection in Perovskite Solar Cells to Attain High Efficiency over 23

引用

ChemSusChem 2021年第15期14卷 3182-3189页

作者： Xiaodong Ren Bobo Zhang Lu Zhang Jialun Wen Bo Che Dongliang Bai Jiaxue You Tao Chen Shengzhong Frank Liu Key Laboratory of Applied Surface and Colloid Chemistry Ministry of Education Shaanxi Key Laboratory for Advanced Energy Devices Shaanxi Engineering Lab for Advanced Energy Technology Institute for Advanced Energy Materials School of Materials Science and Engineering Shaanxi Normal University Xi'an 710119 P. R. China. Hefei National Laboratory for Physical Sciences at the Microscale Department of Materials Science and Engineering University of Science and Technology of China Hefei 230026 P. R. China. Dalian National Laboratory for Clean Energy iChEM Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 P. R. China. University of the Chinese Academy of Sciences Beijing 100039 P. R. China.

Most studies choose passivators essentially in a trial-and-error fashion in an attempt to attain high efficiency in perovskite solar cells (PSCs). Using deep-level transient spectroscopy (DLTS) measurements, the type of defects in perovskite films was determined to guide the passivator selection for PSCs. Three kinds of positively charged defects were found in the target PSC system. Fluorinated phenylethylamine hydroiodide (FPEAI) was chosen to passivate the surface defects due to the electronegativity and hydrophobicity of fluorine. Due to the decreased surface roughness, increased hydrophobicity, lowered defect density, and improved carrier dynamics as observed by ultrafast transient absorption spectroscopy (TAS), a PSC with meta-F-PEAI had the best efficiency over 23 % with open-circuit voltage of 1.155 V and fill factor of 80.15 %. In addition, the long-term stability of the PSC was significantly improved. The present work provides a new means to select the best passivator for different types of defects.

关键词： deep-level transient spectroscopy high efficiency perovskite solar cells photovoltaics surface passivation

来源：评论

学校读者我要写书评

暂无评论

Magnetoelectric spectroscopy of spin excitations in LiCoPO4

arXiv

引用

arXiv 2021年

作者： Kocsis, Vilmos Bordács, Sándor Tokunaga, Yusuke Viirok, Johan Peedu, Laur Rõõm, Toomas Nagel, Urmas Taguchi, Yasujiro Tokura, Yoshinori Kézsmárki, István Wako Saitama351-0198 Japan Department of Physics Budapest University of Technology and Economics MTA-BME Lendület Magneto-optical Spectroscopy Research Group Budapest1111 Hungary Hungarian Academy of Sciences Premium Postdoctor Program Budapest1051 Hungary Department of Advanced Materials Science University of Tokyo Kashiwa277-8561 Japan National Institute of Chemical Physics and Biophysics Akadeemia tee 23 Tallinn12618 Estonia Department of Applied Physics Tokyo College University of Tokyo Hongo Tokyo113-8656 Japan Experimental Physics 5 Center for Electronic Correlations and Magnetism Institute of Physics University of Augsburg Augsburg86159 Germany

We have studied spin excitations in a single-domain crystal of antiferromagnetic LiCoPO4 by THz absorption spectroscopy. By analysing the selection rules and comparing the strengths of the absorption peaks in the different antiferromagnetic domains, we found electromagnons and magnetoelectric (ME) spin resonances besides conventional magnetic-dipole active spin-wave excitations. Using the sum rule for the ME susceptibility we determined the contribution of the spin excitations to all the different off-diagonal elements of the static ME susceptibility tensor in zero as well as in finite magnetic fields. We conclude that the ME spin resonances are responsible for the static ME response of the bulk, when the magnetic field is along the x axis, and the symmetric part of the ME tensor with zero diagonal elements dominates over the antisymmetric components. Copyright © 2021, The Authors. All rights reserved.

关键词： Lithium compounds

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：