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Cascade Synthesis of Fe-N2-Fe Dual-Atom Catalysts for Superior Oxygen Catalysis

Angewandte Chemie 2024年第40期136卷

作者： Shuang Zhao Minjie Liu Zehua Qu Yan Yan Zhirong Zhang Jifeng Yang Siyuan He Zhou Xu Yiquan Zhu Laihao Luo Kwun Nam Hui Mingkai Liu Jie Zeng School of Chemistry & Materials Science Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials Jiangsu Normal University Xuzhou 221116 China State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Science Fudan University Shanghai 200433 China School of Chemistry & Chemical Engineering Anhui University of Technology Ma'anshan Anhui 243002 P. R. China Hefei National Research Center for Physical Sciences at the Microscale Key Laboratory of Strongly-Coupled Quantum Matter Physics of Chinese Academy of Sciences Key Laboratory of Surface and Interface Chemistry and Energy Catalysis of Anhui Higher Education Institutes Department of Chemical Physics University of Science and Technology of China Hefei Anhui 230026 P. R. China Institute of Applied Physics and Materials Engineering University of Macau Macau China

Dual-atom catalysts (DACs) have been proposed to break the limitation of single-atom catalysts (SACs) in the synergistic activation of multiple molecules and intermediates, offering an additional degree of freedom for catalytic regulation. However, it remains a challenge to synthesize DACs with high uniformity, atomic accuracy, and satisfactory loadings. Herein, we report a facile cascade synthetic strategy for DAC via precise electrostatic interaction control and neighboring vacancy construction. We synthesized well-defined, uniformly dispersed dual Fe sites which were connected by two nitrogen bonds (denoted as Fe-N 2 -Fe). The as-synthesized DAC exhibited superior catalytic performances towards oxygen reduction reaction, including good half-wave potential (0.91 V), high kinetic current density (21.66 mA cm −2 ), and perfect durability. Theoretical calculation revealed that the DAC structure effectively tunes the oxygen adsorption configuration and decreases the cleavage barrier, thereby improving the catalytic kinetics. The DAC-based zinc-air batteries exhibited impressive power densities of 169.8 and 52.18 mW cm −2 at 25 °C and −40 °C, which is 1.7 and 2.0 times higher than those based on Pt/C+Ir/C, respectively. We also demonstrated the universality of our strategy in synthesizing other M-N 2 -M DACs (M=Co, Cu, Ru, Pd, Pt, and Au), facilitating the construction of a DAC library for different catalytic applications.

关键词： dual-atom catalyst single-atom catalyst synthetic strategy oxygen reduction reaction zinc-air battery

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Observation of flow angle and flow magnitude fluctuations in Pb-Pb collisions at sNN=5.02TeV at the CERN Large Hadron Collider

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physical Review C 2023年第5期107卷 L051901-L051901页

作者： S. Acharya D. Adamová A. Adler G. Aglieri Rinella M. Agnello N. Agrawal Z. Ahammed S. Ahmad S. U. Ahn I. Ahuja A. Akindinov M. Al-Turany D. Aleksandrov B. Alessandro H. M. Alfanda R. Alfaro Molina B. Ali Y. Ali A. Alici N. Alizadehvandchali A. Alkin J. Alme G. Alocco T. Alt I. Altsybeev M. N. Anaam C. Andrei A. Andronic V. Anguelov F. Antinori P. Antonioli C. Anuj N. Apadula L. Aphecetche H. Appelshäuser C. Arata S. Arcelli M. Aresti R. Arnaldi I. C. Arsene M. Arslandok A. Augustinus R. Averbeck S. Aziz M. D. Azmi A. Badalà Y. W. Baek X. Bai R. Bailhache Y. Bailung R. Bala A. Balbino A. Baldisseri B. Balis D. Banerjee Z. Banoo R. Barbera L. Barioglio M. Barlou G. G. Barnaföldi L. S. Barnby V. Barret L. Barreto C. Bartels K. Barth E. Bartsch F. Baruffaldi N. Bastid S. Basu G. Batigne D. Battistini B. Batyunya D. Bauri J. L. Bazo Alba I. G. Bearden C. Beattie P. Becht D. Behera I. Belikov A. D. C. Bell Hechavarria F. Bellini R. Bellwied S. Belokurova V. Belyaev G. Bencedi S. Beole A. Bercuci Y. Berdnikov A. Berdnikova L. Bergmann M. G. Besoiu L. Betev P. P. Bhaduri A. Bhasin M. A. Bhat B. Bhattacharjee L. Bianchi N. Bianchi J. Bielčík J. Bielčíková J. Biernat A. P. Bigot A. Bilandzic G. Biro S. Biswas N. Bize J. T. Blair D. Blau M. B. Blidaru N. Bluhme C. Blume G. Boca F. Bock T. Bodova A. Bogdanov S. Boi J. Bok L. Boldizsár A. Bolozdynya M. Bombara P. M. Bond G. Bonomi H. Borel A. Borissov H. Bossi E. Botta L. Bratrud P. Braun-Munzinger M. Bregant M. Broz G. E. Bruno M. D. Buckland D. Budnikov H. Buesching S. Bufalino O. Bugnon P. Buhler Z. Buthelezi J. B. Butt A. Bylinkin S. A. Bysiak M. Cai H. Caines A. Caliva E. Calvo Villar J. M. M. Camacho P. Camerini F. D. M. Canedo M. Carabas F. Carnesecchi R. Caron J. Castillo Castellanos F. Catalano C. Ceballos Sanchez I. Chakaberia P. Chakraborty S. Chandra S. Chapeland M. Chartier S. Chattopadhyay T. G. Chavez T. Cheng C. Cheshkov B. Cheynis V. Chibante Barroso D. D. Chinellato E. S. Chizzali J. Cho S. Cho P. Chochula P. Christakoglou C. H. Christensen P. Christiansen T Université Clermont Auvergne CNRS/IN2P3 LPC Clermont-Ferrand France Variable Energy Cyclotron Centre Homi Bhabha National Institute Kolkata India Nuclear Physics Institute of the Czech Academy of Sciences Husinec-Řež Czech Republic Johann-Wolfgang-Goethe Universität Frankfurt Institut für Informatik Fachbereich Informatik und Mathematik Frankfurt Germany European Organization for Nuclear Research (CERN) Geneva Switzerland Dipartimento DISAT del Politecnico and Sezione INFN Turin Italy INFN Sezione di Bologna Bologna Italy Department of Physics Aligarh Muslim University Aligarh India Korea Institute of Science and Technology Information Daejeon Republic of Korea Faculty of Science P.J. Šafárik University Košice Slovak Republic Affiliated with an institute covered by a cooperation agreement with CERN Research Division and ExtreMe Matter Institute EMMI GSI Helmholtzzentrum für Schwerionenforschung GmbH Darmstadt Germany INFN Sezione di Torino Turin Italy Central China Normal University Wuhan China Instituto de Física Universidad Nacional Autónoma de México Mexico City Mexico COMSATS University Islamabad Islamabad Pakistan Dipartimento di Fisica e Astronomia dell'Università and Sezione INFN Bologna Italy University of Houston Houston Texas United States Department of Physics and Technology University of Bergen Bergen Norway INFN Sezione di Cagliari Cagliari Italy Institut für Kernphysik Johann Wolfgang Goethe-Universität Frankfurt Frankfurt Germany Horia Hulubei National Institute of Physics and Nuclear Engineering Bucharest Romania Westfälische Wilhelms-Universität Münster Institut für Kernphysik Münster Germany Physikalisches Institut Ruprecht-Karls-Universität Heidelberg Heidelberg Germany INFN Sezione di Padova Padova Italy Lawrence Berkeley National Laboratory Berkeley California United States SUBATECH IMT Atlantique Nantes Université CNRS-IN2P3 Nantes France Laboratoire de Physique Subatomique et de Cosmologie Université Grenoble-Alpes C

This Letter reports on the first measurements of transverse momentum dependent flow angle Ψn and flow magnitude vn fluctuations determined using new four-particle correlators. The measurements are performed for various centralities in Pb–Pb collisions at a center-of-mass energy per nucleon pair of sNN = 5.02 TeV with ALICE at the CERN Large Hadron Collider. Both flow angle and flow magnitude fluctuations are observed in the presented centrality ranges and are strongest in the most central collisions and for a transverse momentum pT>2GeV/c. Comparison with theoretical models, including iEBE-VISHNU, MUSIC, and AMPT, show that the measurements exhibit unique sensitivities to the initial state of heavy-ion collisions.

关键词： Hadron-hadron interactions Particle correlations & fluctuations Relativistic heavy-ion collisions

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Non-trivial Contribution of Carbon Hybridization in Carbon-based Substrates to Electrocatalytic Activities in Li-S Batteries

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Angewandte Chemie 2022年第3期135卷

作者： Jiawen Zhu Jiaqi Cao Guolei Cai Jing Zhang Wei Zhang Shuai Xie Jinxi Wang Dr. Hongchang Jin Junjie Xu Prof. Xianghua Kong Dr. Song Jin Prof. Zhenyu Li Prof. Hengxing Ji Hefei National Laboratory for Physical Sciences at the Microscale CAS Key Laboratory of Materials for Energy Conversion Department of Applied Chemistry Department of Chemical Physics University of Science and Technology of China Hefei 230026 China Beijing Synchrotron Radiation Laboratory Institute of High Energy Physics Chinese Academy of Sciences Beijing 100049 China School of Chemistry and Chemical Engineering Hefei University of Technology Hefei 230009 China

Appling an electrochemical catalyst is an efficient strategy for inhibiting the shuttle effect and enhancing the S utilization of Li-S batteries. Carbon-based materials are the most common conductive agents and catalyst supports used in Li-S batteries, but the correlation between the diversity of hybridizations and sulfur reduction reaction (SRR) catalytic activity remains unclear. Here, by establishing two forms of carbon models, i.e., graphitic carbon (GC) and amorphous carbon (AC), we observe that the nitrogen atom doped in the GC possesses a higher local charge density and a lower Gibbs free energy towards the formation of polysulfides than in the AC. And the GC-based electrode consistently inherits considerably enhanced SRR kinetics and superior cycling stability and rate capability in Li-S batteries. Therefore, the function of carbon in Li-S batteries is not only limited as conductive support but also plays an unignorable contribution to the electrocatalytic activities of SRR.

关键词： Carbon Hybridization Carbon-Based Electrocatalyst Lithium-Sulfur Batteries Sulfur Reduction Reaction

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A Crmnfeconi High Entropy Alloy Boosting Oxygen Evolution/Reduction Reactions and Zinc-Air Battery Performance

SSRN

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SSRN 2022年

作者： He, Ren Yang, Linlin Zhang, Yu Wang, Xiang Lee, Seungho Zhang, Ting Li, Lingxiao Liang, Zhifu Chen, Jingwei Li, Junshan Ostovari Moghaddam, Ahmad Llorca, Jordi Ibanez, Maria Arbiol, Jordi Xu, Ying Cabot, Andreu Catalonia Energy Research Institute IREC Sant Adria de Besòs Barcelona08930 Spain Department of nanoscience Universitat de Barcelona Barcelona08028 Spain Department of Materials Science and Engineering Pennsylvania State University University ParkPA16802 United States IST Austria Am Campus 1 Klosterneuburg3400 Austria CSIC BIST Campus UAB Bellaterra Catalonia08193 Spain School of Mechanical and Power Engineering Zhengzhou University Zhengzhou Henan450001 China Hebei Key Lab of Optic-electronic Information and Materials College of Physics Science and Technology Hebei University Baoding071002 China Institute of Advanced Study Chengdu University Chengdu610106 China Department of Materials Science Physical and Chemical Properties of Materials South Ural State University 76 Lenin Ave Chelyabinsk454080 Russia Institute of Energy Technologies Department of Chemical Engineering and Barcelona Research Center in Multiscale Science and Engineering Universitat Politècnica de Catalunya EEBE Barcelona08019 Spain ICREA Pg. Lluis Companys 23 Catalonia Barcelona08010 Spain

The development of cost-effective, high-activity, and stable bifunctional catalysts for the oxygen reduction and evolution reactions (ORR/OER) is essential for Zn–air batteries (ZABs) to reach the market. Such catalysts must contain multiple adsorption/reaction sites to cope with the high demands of reversible oxygen electrodes. Herein, we propose a high entropy alloy (HEA) based on relatively abundant elements as a bifunctional ORR/OER catalyst. More specifically, we detail the synthesis of a CrMnFeCoNi HEA through a low-temperature solution-based approach. Such HEA displays superior OER performance with an overpotential of 265 mV at a current density of 10 mA/cm2, and a 37.9 mV dec-1 Tafel slope, well above the properties of a standard commercial catalyst based on RuO2. This high performance is partially explained by the presence of twinned defects, the incidence of large lattice distortions, and the electronic synergy between the different components, being Cr key to decreasing the energy barrier of the OER rate-determining step. CrMnFeCoNi also displays superior ORR performance with a half-potential of 0.78 V and an onset potential of 0.88 V, comparable with commercial Pt/C. The potential gap (Egap) between the OER overpotential and the ORR half-potential of CrMnFeCoNi is just 0.734 V. ZABs are assembled using the CrMnFeCoNi HEA as air cathode and a zinc foil as the anode. The assembled cells provide an open-circuit voltage (OPV) of 1.489 V, a peak power density of 116.5 mW/cm2, and a specific capacity of 836 mAh g−1 that stays stable for more than 10 days of continuous cycling. © 2022, The Authors. All rights reserved.

关键词： Cost effectiveness

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A Crmnfeconi High Entropy Alloy Boosting Oxygen Evolution/Reduction Reactions and Zinc-Air Battery Performance

SSRN

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SSRN 2022年

作者： He, Ren Yang, Linlin Zhang, Yu Wang, Xiang Lee, Seungho Zhang, Ting Li, Lingxiao Liang, Zhifu Chen, Jingwei Li, Junshan Moghaddam, Ahmad Ostovari Llorca, Jordi Ibanez, Maria Arbiol, Jordi Xu, Ying Cabot, Andreu Catalonia Energy Research Institute IREC Sant Adria de Besòs Barcelona08930 Spain Department of Nanoscience Universitat de Barcelona Barcelona08028 Spain Department of Materials Science and Engineering Pennsylvania State University University ParkPA16802 United States IST Austria Am Campus 1 Klosterneuburg3400 Austria CSIC BIST Campus UAB Bellaterra Catalonia08193 Spain School of Mechanical and Power Engineering Zhengzhou University Zhengzhou Henan450001 China Hebei Key Lab of Optic-electronic Information and Materials College of Physics Science and Technology Hebei University Baoding071002 China Institute of Advanced Study Chengdu University Chengdu610106 China Department of Materials Science Physical and Chemical Properties of Materials South Ural State University 76 Lenin Ave Chelyabinsk454080 Russia Institute of Energy Technologies Department of Chemical Engineering and Barcelona Research Center in Multiscale Science and Engineering Universitat Politècnica de Catalunya EEBE Barcelona08019 Spain ICREA Pg. Lluis Companys 23 Catalonia Barcelona08010 Spain

The development of cost-effective, high-activity and stable bifunctional catalysts for the oxygen reduction and evolution reactions (ORR/OER) is essential for Zn–air batteries (ZABs) to reach the market. Such catalysts must contain multiple adsorption/reaction sites to cope with the high demands of reversible oxygen electrodes. Herein, we propose a CrMnFeCoNi high entropy alloy (HEA), such HEA displays superior OER and ORR performance, well above the properties of a standard commercial catalyst. This high performance is partially explained by the presence of twinned defects, large lattice distortion and the electronic synergy between the different components, being Cr key to decreasing the energy barrier of the OER rate-determining step. ZABs are assembled with an open-circuit voltage of 1.489 V, i.e. 90% of its theoretical limit, a peak power density of 116.5 mW/cm2, and a specific capacity of 836 mAh g−1 and stay stable for more than 10 days of continuous cycling. © 2022, The Authors. All rights reserved.

关键词： Cost effectiveness

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Direct observational evidence of multi-epoch massive star formation in G24.47+0.49

arXiv

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arXiv 2024年

作者： Saha, Anindya Tej, Anandmayee Liu, Hong-Li Liu, Tie Garay, Guido Goldsmith, Paul F. Lee, Chang Won He, Jinhua Juvela, Mika Bronfman, Leonardo Baug, Tapas Vázquez-Semadeni, Enrique Sanhueza, Patricio Li, Shanghuo Chibueze, James O. Bhadari, N.K. Dewangan, Lokesh K. Das, Swagat Ranjan Xu, Feng-Wei Issac, Namitha Hwang, Jihye Tóth, L. Viktor Indian Institute of Space Science and Technology Kerala Thiruvananthapuram695 547 India Department of Astronomy Yunnan University Kunming650091 China Shanghai Astronomical Observatory Chinese Academy of Sciences 80 Nandan Road Shanghai200030 China Key Laboratory for Research in Galaxies and Cosmology Shanghai Astronomical Observatory Chinese Academy of Sciences 80 Nandan Road Shanghai200030 China Departamento de Astronomía Universidad de Chile Las Condes Santiago7550000 Chile Jet Propulsion Laboratory California Institute of Technology 4800 Oak Grove Drive PasadenaCA91109 United States 217 Gajeong-ro Yuseong-gu Daejeon34113 Korea Republic of Korea Astronomy and Space Science Institute 776 Daedeokdae-ro Yuseong-gu Daejeon34055 Korea Republic of Yunnan Observatories Chinese Academy of Sciences Phoenix Mountain East Suburb of Kunming Yunnan650216 China at Cerro Calán Camino El Observatorio #1515 Las Condes Santiago Chile Department of Physics University of Helsinki P.O. box 64 FI- 00014 Finland Satyendra Nath Bose National Centre for Basic Sciences Block-JD Sector-III Kolkata Salt Lake700 106 India Instituto de Radioastronomía y Astrofísica Universidad Nacional Autónoma de México Antigua Carretera a Pátzcuaro 8701 Ex-Hda. San José de la Huerta Michoacán Morelia58089 Mexico National Astronomical Observatory of Japan National Institutes of Natural Sciences 2-21-1 Osawa Mitaka Tokyo181-8588 Japan Astronomical Science Program The Graduate University for Advanced Studies SOKENDAI 2-21-1 Osawa Mitaka Tokyo181-8588 Japan Max Planck Institute for Astronomy Königstuhl 17 HeidelbergD-69117 Germany Department of Mathematical Sciences University of South Africa Cnr Christian de Wet Rd and Pioneer Avenue Florida Park Roodepoort1709 South Africa Department of Physics and Astronomy Faculty of Physical Sciences University of Nigeria Carver Building 1 University Road Nsukka410001 Nigeria Physical Research Laboratory Navrangpura Ahm

Using new continuum and molecular line data from the ALMA Three-millimeter Observations of Massive Star-forming Regions (ATOMS) survey and archival VLA, 4.86 GHz data, we present direct observational evidence of hierarchical triggering relating three epochs of massive star formation in a ring-like H II region, G24.47+0.49. We find from radio flux analysis that it is excited by a massive star(s) of spectral type O8.5V–O8V from the first epoch of star formation. The swept-up ionized ring structure shows evidence of secondary collapse, and within this ring a burst of massive star formation is observed in different evolutionary phases, which constitutes the second epoch. ATOMS spectral line (e.g., HCO+(1–0)) observations reveal an outer concentric molecular gas ring expanding at a velocity of ~ 9 km s−1, constituting the direct and unambiguous detection of an expanding molecular ring. It harbors twelve dense molecular cores with surface mass density greater than 0.05 g cm−2, a threshold typical of massive star formation. Half of them are found to be subvirial, and thus in gravitational collapse, making them third epoch of potential massive star-forming sites. Copyright © 2024, The Authors. All rights reserved.

关键词： Stars

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Corrigendum to “Pure TeO 2 glass: Influence of synthesis conditions on linear and non-linear optical, magneto-optical and structural properties,” [J. Alloys Compd., 997 (2024) 174788]

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Journal of Alloys and Compounds 2024年 1004卷

作者： J. Hrabovsky N.S. Tagiara J. Mistrik L. Strizik P. Rysanek V. Kopecky J. Kozlik J. Orava S. Wang T. Ishibashi E.I. Kamitsos M. Veis Institute of Physics Faculty of Mathematics and Physics Charles University Ke Karlovu 5 Prague 2 121 16 Czech Republic National Hellenic Research Foundation Theoretical and Physical Chemistry Institute 48 Vassileos Constantinou Ave. Athens 116 35 Greece University of Pardubice Faculty of Chemical Technology Center of Materials and Nanotechnologies nam. Cs. Legii 565 Pardubice 530 02 Czech Republic University of Pardubice Faculty of Chemical Technology Institute of Applied Physics and Mathematics Pardubice Czech Republic Department of General and Inorganic Chemistry Faculty of Chemical Technology University of Pardubice Studentska 573 Pardubice 532 10 Czech Republic Faculty of Science Jan Evangelista Purkyne University in Usti nad Labem Pasteurova 3632/15 Usti nad Labem 400 96 Czech Republic Charles University Faculty of Mathematics and Physics Depart. of Physics of Materials Ke Karlovu 5 Prague 121 16 Czech Republic Faculty of Environment Jan Evangelista Purkyne University in Usti nad Labem Pasteurova 3632/15 Usti nad Labem 400 96 Czech Republic Nagaoka University of Technology Department of Materials Science and Bioengineering Kamitomioka 1603-1 Nagaoka 940-2188 Japan

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Capturing 3D atomic defects and phonon localization at the 2D heterostructure interface

arXiv

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arXiv 2021年

作者： Tian, Xuezeng Yan, Xingxu Varnavides, Georgios Yuan, Yakun Kim, Dennis S. Ciccarino, Christopher J. Anikeeva, Polina Li, Ming-Yang Li, Lain-Jong Narang, Prineha Pan, Xiaoqing Miao, Jianwei Department of Physics & Astronomy California NanoSystems Institute University of California Los AngelesCA90095 United States Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing100190 China Department of Materials Science and Engineering University of California - Irvine IrvineCA92697 United States Irvine Materials Research Institute University of California - Irvine CA92697 United States Harvard John A. Paulson School of Engineering and Applied Sciences Harvard University CambridgeMA02138 United States Department of Materials Science and Engineering Massachusetts Institute of Technology CambridgeMA02139 United States Research Laboratory of Electronics Massachusetts Institute of Technology CambridgeMA02139 United States Department of Chemistry and Chemical Biology Harvard University CambridgeMA02138 United States Physical Sciences and Engineering Division King Abdullah University of Science and Technology Thuwal23955-6900 Saudi Arabia Department of Mechanical Engineering University of Hong Kong Pokfulam Road Hong Kong Department of Physics and Astronomy University of California - Irvine IrvineCA92697 United States

The 3D local atomic structures and crystal defects at the interfaces of heterostructures control their electronic, magnetic, optical, catalytic and topological quantum properties, but have thus far eluded any direct experimental determination. Here we determine the 3D local atomic positions at the interface of a MoS2-WSe2 heterojunction with picometer precision and correlate 3D atomic defects with localized vibrational properties at the epitaxial interface. We observe point defects, bond distortion, atomic-scale ripples and measure the full 3D strain tensor at the heterointerface. By using the experimental 3D atomic coordinates as direct input to first principles calculations, we reveal new phonon modes localized at the interface, which are corroborated by spatially resolved electron energy-loss spectroscopy. We expect that this work will open the door to correlate structure-property relationships of a wide range of heterostructure interfaces at the single-atom level. Main Text: A major challenge in materials design and engineering is to tailor the 3D atomic structures at the interface to achieve the desired properties. Although 2D lateral and vertical heterostructures have been actively studied for fundamental interest and practical applications (1-9), our current understanding of the atomic structure at the heterointerface has been primarily relied on aberration-corrected electron microscopy and scanning probe microscopy (6-11), which provide either 2D projection images or surface structure. On the computational side, density functional theory (DFT) can be used to predict the properties of heterostructures (12-15), but requires knowledge of the 3D local atomic coordinates. Due to the difficulty in directly measuring these 3D coordinates, such studies often use perfect crystal lattices (12-14), statistically incorporate crystal defects into the interface (15), and relax the atomic configurations to the minimum energy states. However, real heterointerfaces have neit

关键词： Density functional theory

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Two superconducting phases induced at point contacts on the Weyl semimetal TaAs

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physical Review B 2020年第13期101卷 134503-134503页

作者： Xing-Yuan Hou Ya-Dong Gu Shu-Jing Li Ling-Xiao Zhao Wen-Liang Zhu Zong Wang Meng-Di Zhang Fan Zhang Lu Zhang Hai Zi Yan-Wei Wu Huai-Xin Yang Zhi-An Ren Ping Zhang Gen-Fu Chen Ning Hao Lei Shan Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education Institutes of Physical Science and Information Technology Anhui University Hefei 230601 China Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 China School of Physical Sciences University of Chinese Academy of Sciences Beijing 100190 China Institute of Applied Physics and Computational Mathematics Beijing 100088 China Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions High Magnetic Field Laboratory Chinese Academy of Sciences Hefei 230031 China College of Mathematics and Physics Beijing University of Chemical Technology Beijing 100029 China Songshan Lake Materials Laboratory Dongguan Guangdong 523808 China

Tip-induced superconductivity at point contacts on the nonsuperconducting Weyl semimetal TaAs has been reported recently. Meanwhile, both the main tetragonal phase and the intergrown hexagonal phase of TaAs were identified to be topologically nontrivial according to theoretical calculations. Here, we report the observation of two independent local superconducting states induced at the point contacts formed on TaAs, which exhibit distinct temperature dependencies of the critical magnetic field Hc2(T). A universal relationship between Hc2(0), Tc, and the Fermi velocities of bulk bands near Weyl points of the two TaAs phases was uncovered, demonstrating the dominant role of the bulk bands in the emergence of superconductivity, rather than the surface states. These results provide a direction to study the mechanism of the tip-induced superconductivity in topological semimetals.

关键词： Superconductivity Point contacts Topological materials Weyl semimetal Andreev point contact spectroscopy Density functional calculations

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Measurement of inclusive J/ψ pair production cross section in pp collisions at s=13 TeV

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physical Review C 2023年第4期108卷 045203-045203页

作者： S. Acharya D. Adamová A. Adler G. Aglieri Rinella M. Agnello N. Agrawal Z. Ahammed S. Ahmad S. U. Ahn I. Ahuja A. Akindinov M. Al-Turany D. Aleksandrov B. Alessandro H. M. Alfanda R. Alfaro Molina B. Ali A. Alici N. Alizadehvandchali A. Alkin J. Alme G. Alocco T. Alt I. Altsybeev M. N. Anaam C. Andrei A. Andronic V. Anguelov F. Antinori P. Antonioli N. Apadula L. Aphecetche H. Appelshäuser C. Arata S. Arcelli M. Aresti R. Arnaldi J. G. M. C. A. Arneiro I. C. Arsene M. Arslandok A. Augustinus R. Averbeck S. Aziz M. D. Azmi A. Badalà J. Bae Y. W. Baek X. Bai R. Bailhache Y. Bailung A. Balbino A. Baldisseri B. Balis D. Banerjee Z. Banoo R. Barbera F. Barile L. Barioglio M. Barlou G. G. Barnaföldi L. S. Barnby V. Barret L. Barreto C. Bartels K. Barth E. Bartsch N. Bastid S. Basu G. Batigne D. Battistini B. Batyunya D. Bauri J. L. Bazo Alba I. G. Bearden C. Beattie P. Becht D. Behera I. Belikov A. D. C. Bell Hechavarria F. Bellini R. Bellwied S. Belokurova G. Bencedi S. Beole A. Bercuci Y. Berdnikov A. Berdnikova L. Bergmann M. G. Besoiu L. Betev P. P. Bhaduri A. Bhasin M. A. Bhat B. Bhattacharjee L. Bianchi N. Bianchi J. Bielčík J. Bielčíková J. Biernat A. P. Bigot A. Bilandzic G. Biro S. Biswas N. Bize J. T. Blair D. Blau M. B. Blidaru N. Bluhme C. Blume G. Boca F. Bock T. Bodova A. Bogdanov S. Boi J. Bok L. Boldizsár M. Bombara P. M. Bond G. Bonomi H. Borel A. Borissov A. G. Borquez Carcamo H. Bossi E. Botta Y. E. M. Bouziani L. Bratrud P. Braun-Munzinger M. Bregant M. Broz G. E. Bruno M. D. Buckland D. Budnikov H. Buesching S. Bufalino P. Buhler Z. Buthelezi A. Bylinkin S. A. Bysiak M. Cai H. Caines A. Caliva E. Calvo Villar J. M. M. Camacho P. Camerini F. D. M. Canedo M. Carabas A. A. Carballo F. Carnesecchi R. Caron L. A. D. Carvalho J. Castillo Castellanos F. Catalano C. Ceballos Sanchez I. Chakaberia P. Chakraborty S. Chandra S. Chapeland M. Chartier S. Chattopadhyay T. G. Chavez T. Cheng C. Cheshkov B. Cheynis V. Chibante Barroso D. D. Chinellato E. S. Chizzali J. Cho S. Cho P. Chochula P. Christakoglou C. H. Université Clermont Auvergne CNRS/IN2P3 LPC Clermont-Ferrand France Nuclear Physics Institute of the Czech Academy of Sciences Husinec-Řež Czech Republic Johann-Wolfgang-Goethe Universität Frankfurt Institut für Informatik Fachbereich Informatik und Mathematik Frankfurt Germany European Organization for Nuclear Research (CERN) Geneva Switzerland Dipartimento DISAT del Politecnico and Sezione INFN Turin Italy INFN Sezione di Bologna Bologna Italy Variable Energy Cyclotron Centre Homi Bhabha National Institute Kolkata India Department of Physics Aligarh Muslim University Aligarh India Korea Institute of Science and Technology Information Daejeon Republic of Korea Faculty of Science P.J. Šafárik University Košice Slovak Republic Affiliated with an institute covered by a cooperation agreement with CERN Research Division and ExtreMe Matter Institute EMMI GSI Helmholtzzentrum für Schwerionenforschung GmbH Darmstadt Germany INFN Sezione di Torino Turin Italy Central China Normal University Wuhan China Instituto de Física Universidad Nacional Autónoma de México Mexico City Mexico Dipartimento di Fisica e Astronomia dell'Università and Sezione INFN Bologna Italy University of Houston Houston Texas USA Department of Physics and Technology University of Bergen Bergen Norway INFN Sezione di Cagliari Cagliari Italy Institut für Kernphysik Johann Wolfgang Goethe-Universität Frankfurt Frankfurt Germany Horia Hulubei National Institute of Physics and Nuclear Engineering Bucharest Romania Westfälische Wilhelms-Universität Münster Institut für Kernphysik Münster Germany Physikalisches Institut Ruprecht-Karls-Universität Heidelberg Heidelberg Germany INFN Sezione di Padova Padova Italy Lawrence Berkeley National Laboratory Berkeley California USA SUBATECH IMT Atlantique Nantes Université CNRS-IN2P3 Nantes France Laboratoire de Physique Subatomique et de Cosmologie Université Grenoble-Alpes CNRS-IN2P3 Grenoble France Universidade de São Paulo (USP) São Paulo

The production cross section of inclusive J/ψ pairs in pp collisions at a center-of-mass energy s=13 TeV is measured with ALICE. The measurement is performed for J/ψ in the rapidity interval 2.50. The production cross section of inclusive J/ψ pairs is reported to be 10.3±2.3(stat.)±1.3(syst.) nb in this kinematic interval. The contribution from nonprompt J/ψ (i.e., originated from beauty-hadron decays) to the inclusive sample is evaluated. The effective double-parton scattering cross section is computed, neglecting the single-parton scattering contribution.

关键词： Hadron-hadron interactions

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