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arXiv 2022年

作者： Crocker, Roland M. Macias, Oscar Mackey, Dougal Krumholz, Mark R. Ando, Shin'ichiro Horiuchi, Shunsaku Baring, Matthew G. Gordon, Chris Venville, Thomas Duffy, Alan R. Yang, Rui-Zhi Aharonian, Felix Hinton, J.A. Song, Deheng Ruiter, Ashley J. Filipović, Miroslav D. Research School of Astronomy and Astrophysics Australian National University CanberraACT2611 Australia GRAPPA − Gravitational and Astroparticle Physics Amsterdam University of Amsterdam Science Park 904 Amsterdam1098 XH Netherlands UTIAS The University of Tokyo Chiba Kashiwa277-8583 Japan Center for Neutrino Physics Department of Physics Virginia Tech BlacksburgVA24061 United States Department of Physics and Astronomy - MS 108 Rice University 6100 Main Street HoustonTX77251-1892 United States School of Physical and Chemical Sciences University of Canterbury Christchurch New Zealand Centre for Astrophysics and Supercomputing Swinburne University of Technology PO Box 218 HawthornVIC3122 Australia Department of Astronomy School of Physical Sciences University of Science and Technology of China Anhui Hefei230026 China CAS Key Labrotory for Research in Galaxies and Cosmology University of Science and Technology of China Anhui Hefei230026 China School of Astronomy and Space Science University of Science and Technology of China Anhui Hefei230026 China Max-Planck-Institut für Kernphysik Saupfercheckweg 1 Heidelberg69117 Germany Dublin Institute for Advanced Studies 31 Fitzwilliam Place Dublin 2 Ireland School of Science University of New South Wales Canberra The Australian Defence Force Academy CanberraACT2600 Australia Western Sydney University Locked Bag 1797 South DC PenrithNSW2751 Australia

The Fermi Bubbles are giant, γ-ray emitting lobes emanating from the nucleus of the Milky Way[1, 2] discovered in ∼ 1-100 GeV data collected by the Large Area Telescope on board the Fermi Gamma-Ray Space Telescope[3]. Previous work[4] has revealed substructure within the Fermi Bubbles that has been interpreted as a signature of collimated outflows from the Galaxy’s super-massive black hole. Here we show via a spatial template analysis that much of the γ-ray emission associated to the brightest region of substructure – the so-called cocoon – is likely due to the Sagittarius dwarf spheroidal (Sgr dSph) galaxy. This large Milky Way satellite is viewed through the Fermi Bubbles from the position of the Solar System. As a tidally and ram-pressure stripped remnant, the Sgr dSph has no on-going star formation, but we nevertheless demonstrate that the dwarf’s millisecond pulsar (MSP) population can plausibly supply the γ-ray signal that our analysis associates to its stellar template. The measured spectrum is naturally explained by inverse Compton scattering of cosmic microwave background photons by high-energy electron-positron pairs injected by MSPs belonging to the Sgr dSph, combined with these objects’ magnetospheric emission. This finding plausibly suggests that MSPs produce significant γ-ray emission amongst old stellar populations, potentially confounding indirect dark matter searches in regions such as the Galactic Centre, the Andromeda galaxy, and other massive Milky Way dwarf spheroidals. © 2022, CC BY.

关键词： Gamma rays

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High-loading and thermally stable Pt1/MgAl1.2Fe0.8O4 single-atom catalysts for high-temperature applications

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science China Materials 2020年第6期63卷 949-958页

作者： Kaipeng Liu Yan Tang Zhiyang Yu Binghui Ge Guoqing Ren Yujing Ren Yang Su Jingcai Zhang Xiucheng Sun Zhiqiang Chen Aiqin W ang Jun Li CAS Key Laboratory of Science and Technology on Applied Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China University of Chinese Academy of Sciences Beijing 100049China Department of Chemistry&Key Laboratory of Organic Optoelectronics and Molecular Engineering of the Ministry of Education Tsinghua UniversityBeijing 100084China State Key Laboratory of Photocatalysis on Energy and Environment College of ChemistryFuzhou UniversityFuzhou 350002China Institute of Physical Science and Information Technology Anhui UniversityHefei 230601China Department of Chemistry Southern University of Science and TechnologyShenzhen 518055China

Single-atom catalysts(SACs)have attracted extensive attention in the field of heterogeneous ***,the fabrication of SACs with high loading and hightemperature stability remains a grand challenge,especially on oxide *** this work,we have demonstrated that through strong covalent metal-support interaction,highloading and thermally stable single-atom Pt catalysts can be readily prepared by using Fe modified spinel as *** catalytic performance in N2O decomposition reaction is obtained on such SACs than their nanocatalyst counterpart and low-surface-area Fe2O3 supported Pt *** work provides a strategy for the fabrication of high-loading and thermally stable SACs for applications at high temperatures.

关键词： high loading thermal stability single-atom catalyst strong covalent metal-support interaction N20 decomposition

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The phase transition in copper pyrophosphate, Cu2P2O7: Insights and implications for the interpretation of negative thermal expansion

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Matter 2025年

作者： Dove, Martin T. Shi, Naike School of Mechanical Engineering Guizhou University of Engineering Science Guizhou Bijie551700 China Institute of Atomic and Molecular Physics Sichuan University Sichuan Chengdu610065 China School of Physical and Chemical Sciences Queen Mary University of London Mile End Road LondonE1 4NS United Kingdom Department of Physical Chemistry University of Science and Technology Beijing Beijing100083 China School of Materials Science and Engineering Nanyang Technological University 50 Nanyang Avenue Singapore639798 Singapore

The origin of negative thermal expansion (NTE) in Cu2P2O7 has been examined using diffraction data at ambient and raised pressure. From an analysis of spontaneous strains and order parameters associated with the structural phase transition, we show that the NTE can be explained wholly on the basis of the structural distortions that accompany the phase transition. We demonstrate that the NTE diverges at the phase transition, because the phase transition shows tricritical behavior. The unusual aspect of the phase transition is that it gives rise to an expansion on cooling, whereas normally, a structural phase transition leads to an overall volume reduction. This behavior, which we identify as a uniaxial spontaneous strain, can be understood in terms of ordering of pairs of long Cu–O bonds associated with buckling of the atomic layers in the crystal structure. We demonstrate that the NTE is enhanced under pressure. © 2025 The Authors

关键词： Crystal atomic structure

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Reconstructing the Coordination Environment of Fe/Co Dual-atom Sites towards Efficient Oxygen Electrocatalysis for Zn–Air Batteries

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Angewandte Chemie 2024年第7期137卷

作者： Hengqi Liu Jinzhen Huang Kun Feng Rui Xiong Shengyu Ma Ran Wang Prof. Qiang Fu Moniba Rafique Prof. Zhiguo Liu Prof. Jiecai Han Daxing Hua Prof. Jiajie Li Prof. Jun Zhong Prof. Xianjie Wang Prof. Zhonglong Zhao Tai Yao Prof. Sida Jiang Prof. Ping Xu Prof. Zhihua Zhang Prof. Bo Song National Key Laboratory of Laser Spatial Information Harbin Institute of Technology Harbin 150001 China School of Physics Harbin Institute of Technology Harbin 150001 China National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of Technology Harbin 150001 China Electrochemistry Laboratory Paul Scherrer Institute CH-5232 Villigen PSI Switzerland Institute of Functional Nano and Soft Materials Laboratory Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices Soochow University Suzhou 215123 China School of future technology Harbin Institute of Technology Harbin 150001 China School of Materials Science and Engineering University of Jinan Jinan 250022 China School of Physical Science and Technology Inner Mongolia University Hohhot 010021 China National Key Laboratory of Space Environment and Matter Behaviors Harbin Institute of Technology Harbin 150001 China State Key Laboratory of Space Power-Sources School of Chemistry Chemical Engineering Harbin Institute of Technology Harbin 150001 China School of Materials Science Engineering Dalian Jiaotong University Dalian 116028 China Laboratory for Space Environment and Physical Sciences Frontiers Science Center for Matter Behave in Space Environment Harbin Institute of Technology Harbin 150001 China Zhengzhou Research Institute Harbin Institute of Technology Zhengzhou 450046 China

Dual-atom catalysts with nitrogen-coordinated metal sites embedded in carbon can drive the oxygen reduction and evolution reactions (ORR/OER) in rechargeable zinc–air batteries (ZABs), and the further improvement is limited by the linear scaling relationship of intermediate binding energies in the absorbate evolution mechanism (AEM). Triggering the lattice oxygen mechanism (LOM) is promising to overcome this challenge, but has yet been verified since the lacking of bridge oxygen (O) in the rigid coordination environment of the metal centers. Here, we demonstrate that suitably tailored dual-atom catalysts of FeCo−N−C can undergo out-plane and in-plane reconstruction to form the both axial O and bridge O at the metal centers, and thus activate the LOM pathway. The tailored FeCo−N−C with shortened Fe−N bonds also favors the ORR process, therefore is a promising dual-atom oxygen catalyst. The assembled rechargeable ZABs demonstrate a peak power density of 332 mW cm −2 , and exhibit no notable decline after ~720 h of continuous cycling.

关键词： Tailoring coordination environment lattice oxygen mechanism oxygen evolution reaction oxygen reduction reaction rechargeable zinc–air batteries

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A Photosensitive Composition Based on an Aromatic Polyamide for Lcd 4d Printing of Shape Memory Mechanically Robust Materials

SSRN

引用

SSRN 2022年

作者： Kholkhoev, Bato Ch. Bardakova, Kseniia N. Epifanov, Evgeniy O. Matveev, Zakhar A. Shalygina, Taisiya A. Atutov, Evgeniy B. Voronina, Svetlana Yu. Timashev, Peter S. Burdukovskii, Vitaliy F. Baikal institute of Nature Management Siberian Branch Russian Academy of Sciences 6 Sakhyanovoy str. Ulan-Ude670047 Russia Institute of Photonic Technologies Research center "Crystallography and Photonics" Russian Academy of Sciences 2 Pionerskaya str. Troitsk Moscow108840 Russia Institute for Regenerative Medicine Sechenov University 8-2 Trubetskaya str. Moscow119991 Russia Reshetnev Siberian State University of Science and Technology 31 Krasnoyarsky Rabochy Av. Krasnoyarsk660037 Russia Institute of Physical Materials Science Siberian Branch Russian Academy of Sciences 6 Sakhyanovoy str. Ulan-Ude670047 Russia Semenov Institute of Chemical Physics Russian Academy of Sciences 4 Kosygina str. Moscow119991 Russia Lomonosov Moscow State University Chemical Department 1-3 Leninskiye Gory Moscow119991 Russia

High-temperature shape memory polymers (SMPs) draw growing interest from researchers due to their potential as materials for application in the ﬁeld of high-temperature smart devices. However, in the majority of cases the processing of high-temperature SMPs is limited by fabrication of two-dimensional ﬁlms. Here, we have prepared a photosensitive composition based on high-performance heat resistant poly-N,N'-( m -phenylene)isophthalamide (MPA) and photosensitive components (N,N-dimethylacrylamide and bisphenol A ethoxylate diacrylate (BAEDA)). It has been shown by IR spectroscopy, that LCD 3D printing followed by post-curing at 150°C results in the formation of semi-interpenetrating polymer networks, while thermal processing at a temperature ≥200°C leads to the formation of fully crosslinked structures due to the interaction of NH groups from MPA and acrylic groups from BAEDA via the Michael addition. The post-curing temperature has a significant effect on the thermal and mechanical properties of materials. Thermal post-curing of 3D printed samples at 250°C for 1 hour results in the fabrication of materials with the highest tensile strength (92.4±6.1 MPa), glass transition temperature (148°C) and thermal decomposition temperature (above 350°C). Remarkably, MPA-based materials exhibit an excellent shape memory performance at temperatures >150°C, with fixity ratio (R f ) of 99.7% and recovery ratio (R r ) of 99.9%. Moreover, we showed that the glass transition temperature decreased by no more than 1% after γ-radiation of 200 Gy. In addition, the material maintains a high storage modulus and good shape memory performance after being irradiated, and thus has a great potential in the field of aerospace structural materials. © 2022, The Authors. All rights reserved.

关键词： Temperature

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Manipulating Fano coupling in an opto-thermoelectric field

arXiv

引用

arXiv 2024年

作者： Lin, Linhan Lepeshov, Sergey Krasnok, Alex Huang, Yu Jiang, Taizhi Peng, Xiaolei Korgel, Brian A. Alu, Andrea Zheng, Yuebing State Key Laboratory of Precision Measurement Technology and Instruments Department of Precision Instrument Tsinghua University Beijing100084 China Department of Electrical and Photonics Engineering DTU Electro Technical University of Denmark Building 343 Kgs. LyngbyDK-2800 Denmark Department of Electrical and Computer Engineering Florida International University MiamiFL33174 United States School of Physics and Electronics Hunan University Changsha410082 China Mc Ketta Department of Chemical Engineering The University of Texas at Austin AustinTX78712 United States Materials Science & Engineering Program Texas Materials Institute The University of Texas at Austin AustinTX78712 United States Department of Electrical and Computer Engineering The University of Texas at Austin AustinTX78712 United States Advanced Science Research Center City University of New York New YorkNY10031 United States Physics Program Graduate Center City University of New York NY10016 United States Walker Department of Mechanical Engineering The University of Texas at Austin AustinTX78712 United States

Fano resonances in photonics arise from the coupling and interference between two resonant modes in structures with broken symmetry. They feature an uneven and narrow and tunable lineshape, and are ideally suited for optical spectroscopy. Many Fano resonance structures have been suggested in nanophotonics over the last ten years, but reconfigurability and tailored design remain challenging. Herein, we propose an all-optical "pick-and-place" approach aimed at assemble Fano metamolecules of various geometries and compositions in a reconfigurable manner. We study their coupling behavior by in-situ dark-field scattering spectroscopy. Driven by a light-directed opto-thermoelectric field, silicon nanoparticles with high quality-factor Mie resonances (discrete states) and low-loss BaTiO3 nanoparticles (continuum states) are assembled into all-dielectric heterodimers, where distinct Fano resonances are observed. The Fano parameter can be adjusted by changing the resonant frequency of the discrete states or the light polarization. We also show tunable coupling strength and multiple Fano resonances by altering the number of continuum states and discrete states in dielectric heterooligomers. Our work offers a general design rule for Fano resonance and an all-optical platform for controlling Fano coupling on demand. Copyright © 2024, The Authors. All rights reserved.

关键词： Light polarization

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Search for Z′→μ+μ− in the Lμ−Lτ gauge-symmetric model at Belle

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physical Review D 2022年第1期106卷 012003-012003页

作者： T. Czank I. Jaegle A. Ishikawa I. Adachi K. Adamczyk H. Aihara D. M. Asner T. Aushev R. Ayad V. Babu S. Bahinipati P. Behera J. Bennett F. Bernlochner M. Bessner V. Bhardwaj B. Bhuyan T. Bilka J. Biswal A. Bobrov G. Bonvicini A. Bozek M. Bračko T. E. Browder M. Campajola L. Cao D. Červenkov M.-C. Chang A. Chen B. G. Cheon K. Chilikin H. E. Cho K. Cho Y. Choi S. Choudhury D. Cinabro S. Das N. Dash G. De Nardo R. Dhamija F. Di Capua Z. Doležal T. V. Dong S. Eidelman T. Ferber D. Ferlewicz B. G. Fulsom R. Garg V. Gaur A. Garmash A. Giri P. Goldenzweig B. Golob O. Grzymkowska Y. Guan K. Gudkova C. Hadjivasiliou O. Hartbrich K. Hayasaka H. Hayashii M. T. Hedges M. Hernandez Villanueva T. Higuchi W.-S. Hou C.-L. Hsu T. Iijima K. Inami G. Inguglia R. Itoh M. Iwasaki Y. Iwasaki W. W. Jacobs E.-J. Jang S. Jia Y. Jin C. W. Joo K. K. Joo K. H. Kang G. Karyan T. Kawasaki H. Kichimi C. Kiesling B. H. Kim C. H. Kim D. Y. Kim K.-H. Kim S. H. Kim Y.-K. Kim P. Kodyš I. Komarov T. Konno A. Korobov S. Korpar E. Kovalenko P. Križan R. Kroeger P. Krokovny T. Kuhr M. Kumar K. Kumara Y.-J. Kwon Y.-T. Lai J. S. Lange I. S. Lee S. C. Lee Y. B. Li L. Li Gioi J. Libby K. Lieret D. Liventsev T. Luo C. MacQueen M. Masuda T. Matsuda D. Matvienko M. Merola F. Metzner K. Miyabayashi R. Mizuk G. B. Mohanty S. Mohanty T. Mori M. Mrvar R. Mussa M. Nakao Z. Natkaniec A. Natochii L. Nayak M. Niiyama N. K. Nisar S. Nishida H. Ono Y. Onuki P. Pakhlov G. Pakhlova T. Pang S. Pardi H. Park S.-H. Park S. Patra S. Paul T. K. Pedlar R. Pestotnik L. E. Piilonen T. Podobnik V. Popov E. Prencipe M. T. Prim M. Röhrken A. Rostomyan N. Rout G. Russo D. Sahoo S. Sandilya A. Sangal L. Santelj T. Sanuki V. Savinov G. Schnell J. Schueler C. Schwanda Y. Seino K. Senyo M. E. Sevior M. Shapkin C. Sharma V. Shebalin C. P. Shen J.-G. Shiu B. Shwartz A. Sokolov E. Solovieva S. Stanič M. Starič Z. S. Stottler M. Sumihama T. Sumiyoshi W. Sutcliffe M. Takizawa K. Tanida Y. Tao F. Tenchini K. Trabelsi M. Uchida S. Uehara T. Uglov K. Uno S. Uno P. Urquijo R. Van Tonder G. Varne Kavli Institute for the Physics and Mathematics of the Universe (WPI) University of Tokyo Kashiwa 277-8583 University of Florida Gainesville Florida 32611 Thomas Jefferson National Accelerator Facility Newport News Virginia 23606 High Energy Accelerator Research Organization (KEK) Tsukuba 305-0801 SOKENDAI (The Graduate University for Advanced Studies) Hayama 240-0193 H. Niewodniczanski Institute of Nuclear Physics Krakow 31-342 Department of Physics University of Tokyo Tokyo 113-0033 Brookhaven National Laboratory Upton New York 11973 Higher School of Economics (HSE) Moscow 101000 Department of Physics Faculty of Science University of Tabuk Tabuk 71451 Deutsches Elektronen–Synchrotron 22607 Hamburg Indian Institute of Technology Bhubaneswar Satya Nagar 751007 Indian Institute of Technology Madras Chennai 600036 University of Mississippi University Mississippi 38677 University of Bonn 53115 Bonn University of Hawaii Honolulu Hawaii 96822 Indian Institute of Science Education and Research Mohali SAS Nagar 140306 Indian Institute of Technology Guwahati Assam 781039 Faculty of Mathematics and Physics Charles University 121 16 Prague J. Stefan Institute 1000 Ljubljana Budker Institute of Nuclear Physics SB RAS Novosibirsk 630090 Novosibirsk State University Novosibirsk 630090 Wayne State University Detroit Michigan 48202 Faculty of Chemistry and Chemical Engineering University of Maribor 2000 Maribor Slovenia INFN—Sezione di Napoli 80126 Napoli Università di Napoli Federico II 80126 Napoli Department of Physics Fu Jen Catholic University Taipei 24205 National Central University Chung-li 32054 Department of Physics and Institute of Natural Sciences Hanyang University Seoul 04763 P.N. Lebedev Physical Institute of the Russian Academy of Sciences Moscow 119991 Korea Institute of Science and Technology Information Daejeon 34141 Sungkyunkwan University Suwon 16419 Indian Institute of Technology Hyderabad Telangana 502285 Malaviya National Institute of Technology Jaipur Jaipu

We search for a new gauge boson Z′ that couples only to heavy leptons and their corresponding neutrinos in the process e+e−→Z′(→μ+μ−)μ+μ−, using a 643 fb−1 data sample collected by the Belle experiment at or near the ϒ(1S,2S,3S,4S,5S) resonances at the KEKB collider. While previous searches for Z′ performed a data-based estimation of the initial state radiation effect, our search for the Z′ is the first to include effects due to initial state radiation in the signal simulated samples that were used in estimating the detection efficiency. No signal is observed in the Z′ mass range of 0.212–10 GeV/c2, and we set an upper limit on the coupling strength, g′, constraining the possible Z′ contribution to the anomalous magnetic dipole moment of the muon.

关键词： Extensions of gauge sector Leptonic, semileptonic & radiative decays

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Resource-optimized fermionic local-hamiltonian simulation on a quantum computer for quantum chemistry

arXiv

引用

arXiv 2020年

作者： Wang, Qingfeng Li, Ming Monroe, Christopher Nam, Yunseong Chemical Physics Program Institute for Physical Science and Technology University of Maryland College ParkMD20742 United States IonQ College ParkMD20740 United States Joint Quantum Institute Department of Physics Joint Center for Quantum Information and Computer Science University of Maryland College ParkMD20742 United States Department of Physics University of Maryland College ParkMD20742 United States

The ability to simulate a fermionic system on a quantum computer is expected to revolutionize chemical engineering, materials design, nuclear physics, to name a few. Thus, optimizing the simulation circuits is of significance in harnessing the power of quantum computers. Here, we address this problem in two aspects. In the fault-tolerant regime, we optimize the rz and t gate counts along with the ancilla qubit counts required, assuming the use of a product-formula algorithm for implementation. We obtain a savings ratio of two in the gate counts and a savings ratio of eleven in the number of ancilla qubits required over the state of the art. In the pre-fault tolerant regime, we optimize the two-qubit gate counts, assuming the use of the variational quantum eigensolver (VQE) approach. Specific to the latter, we present a framework that enables bootstrapping the VQE progression towards the convergence of the ground-state energy of the fermionic system. This framework, based on perturbation theory, is capable of improving the energy estimate at each cycle of the VQE progression, by about a factor of three closer to the known ground-state energy compared to the standard VQE approach in the test-bed, classically-accessible system of the water molecule. The improved energy estimate in turn results in a commensurate level of savings of quantum resources, such as the number of qubits and quantum gates, required to be within a pre-specified tolerance from the known ground-state energy. We also explore a suite of generalized transformations of fermion to qubit operators and show that resource-requirement savings of up to more than 20%, in small instances, is possible. © 2020, CC BY.

关键词： Fault tolerance

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Multi-Electron Transfer Halide Cathode Materials Based on Intercalation-Conversion Reaction Towards All-Solid-State Lithium Batteries

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Angewandte Chemie 2024年第4期137卷

作者： Xu Zhou Ming Jiang Yuhao Duan Zhenghao Jia Cheng Yuan Kai Feng Qiang Fu Liang Zhang Xiaofei Yang Xianfeng Li Division of Energy Storage Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 China Institute of Physical Science and Information Technology Anhui University Hefei 230601 China University of Chinese Academy of Sciences Beijing 100049 China State Key Laboratory of Catalysis 2011-Collaborative Innovation Center of Chemistry for Energy Materials Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 China Institute of Functional Nano & Soft Materials (FUNSOM) Jiangsu Key Laboratory of Advanced Negative Carbon Technologies Soochow University Suzhou 215123 China College of Chemistry and Chemical Engineering Yantai University Yantai 264005 China Key Laboratory of Long-Duration and Large-Scale Energy Storage Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian 116023 China

All-solid-state lithium batteries (ASSLBs) with non-flammable solid-state electrolytes offer high energy density and enhanced safety. However, their energy densities are greatly limited by low-capacity and low-ionic-conductivity oxide cathode materials, typically relying on the intercalation-deintercalation mechanism with a catholyte content of 15–30 wt %. Here we introduce the Li x FeX x+2 (X=Cl, Br) families as high-capacity and high-ionic-conductivity alternatives, operating via a 3 mol e − transfer intercalation-conversion coupling reaction. Notably, the catholyte-free ASSLBs using 95 wt % LiFeCl 3 active material delivers a remarkable capacity of 446 mAh g −1 and a high energy density of 912 Wh kg −1 , which surpasses most oxide cathode materials. Of particular interest is the formation of amorphous Fe during the conversion process. The amorphous Fe exhibits high activity, catalyzing the conversion of LiX back to Li x FeX x+2 , which proves instrumental in realizing reversible intercalation-conversion reactions. These halide cathode materials represent a significant advancement towards high-energy-density ASSLBs.

关键词： Halide cathode materials Intercalation-conversion reaction Multi-electron transfer High-energy-density Solid-state lithium batteries

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Coulomb interaction-driven reshaped weyl fermionic dispersions in MoTe2

arXiv

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arXiv 2021年

作者： Kang, Seoung-Hun Jeon, Sangjun Kim, Hyun-Jung Ko, Wonhee Cho, Suyeon Kang, Se Hwang Kim, Sung Wng Yang, Heejun Kim, Hyo Won Son, Young-Woo Korea Institute for Advanced Study Seoul02455 Korea Republic of Department of Physics Chung-Ang University Seoul06974 Korea Republic of Peter Grünberg Institute Institute for Advanced Simulation Forschungszentrum Jülich Jülich52428 Germany Samsung Advanced Institute of Technology Suwon16678 Korea Republic of Center for Nanophase Materials Sciences Oak Ridge National Laboratory Oak RidgeTN37831 United States Department of Chemical Engineering and Materials Science Graduate Program in System Health Science and Engineering Ewha Womans University Seoul03760 Korea Republic of Department of Energy Science Sungkyunkwan University Suwon16419 Korea Republic of Department of Physics Korea Advanced Institute of Science and Technology Daejeon34141 Korea Republic of

We report the direct evidence of impacts of the Coulomb interaction in a prototypical Weyl semimetal, MoTe2, that alter its bare bands in a wide range of energy and momentum. Our quasiparticle interference patterns measured using scanning tunneling microscopy are shown to match the joint density of states of quasiparticle energy bands including momentum-dependent self-energy corrections, while electronic energy bands based on the other simpler local approximations of the Coulomb interaction fail to explain neither the correct number of quasiparticle pockets nor shape of their dispersions observed in our spectrum. With this, we predict a transition between type-I and type-II Weyl fermions with doping and resolve its disparate quantum oscillation experiments, thus highlighting the critical roles of Coulomb interactions in layered Weyl semimetals. © 2021, CC BY-NC-ND.

关键词： Dispersions

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