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Microscopic Magnetism of Nickel-Based Infinite-Layer Superconducting Parent Compounds RNiO_(2)(R=La,Nd):A μSR Study

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Chinese Physics Letters 2024年第9期41卷 133-139页

作者： Qiong Wu Ying Fu Le Wang Xuefeng Zhou Shanmin Wang Zihao Zhu Kaiwen Chen Chengyu Jiang Toni Shiroka adrian D.hillier Jia-Wei Mei Lei Shu State Key Laboratory of Surface Physics Department of PhysicsFudan UniversityShanghai 200438China Department of Physics Southern University of Science and TechnologyShenzhen 518055China Shenzhen Institute for Quantum Science and Engineering and Department of PhysicsSouthern University of Science and TechnologyShenzhen 518055China Laboratory for Muon-Spin Spectroscopy Paul Scherrer InstituteCH-5232 Villigen PSISwitzerland Laboratorium fur Festkorperphysik ETH ZurichCH-8093 ZurichSwitzerland ISIS Facility STFC Rutherford Appleton LaboratoryChiltonDidcotOxfordshireOX110QXUnited Kingdom Shanghai Research Center for Quantum Sciences Shanghai 201315China

By using muon spin relaxation(μSR)measurements,we perform a comparative study of the microscopic magnetism in the parent compounds of infinite-layer nickelate superconductors RNiO_(2)(R=La,Nd).In either compound,the zero-fieldμSR spectra down to the lowest measured temperature reveal no long-range magnetic *** LaNiO_(2),short-range spin correlations appear below T=150 K,and spins fully freeze below T∼10 ***_(2)exhibits a more complex spin dynamics driven by the Nd 4f and Ni3d electron spin ***,it shows features suggesting the proximity to a spin-glass state occurring below T=5 *** both compounds,the spin behavior with temperature is further confirmed by longitudinal-field μSR *** results provide new insight into the magnetism of the parent compounds of the superconducting nickelates,crucial to understanding the microscopic origin of their superconductivity.

关键词： order nickel relaxation

Magnetic Phase Diagram of Cu4-xZnx(OH)6FBr Studied by Neutron-Diffraction and μSR Techniques

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Chinese Physics Letters 2020年第10期37卷 98-102页

作者： Yuan Wei Xiaoyan Ma Zili Feng Devashibhai Adroja adrian hillier Pabitra Biswas Anatoliy Senyshyn Andreas Hoser Jia-Wei Mei Zi Yang Meng Huiqian Luo Youguo Shi Shiliang Li Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100190China Institute for Solid State Physics University of TokyoKashiwa 277-8581Japan ISIS Facility Rutherford Appleton LaboratoryChiltonDidcot Oxon OX110QXUnited Kingdom Highly Correlated Matter Research Group Physics DepartmentUniversity of JohannesburgPO Box 524Auckland Park 2006South Africa Heinz Maier-Leibnitz Zentrum(MLZ) Technische Universität MünchenGarching D-85747Germany Helmholtz-Zentrum Berlin für Materialien und Energie D-14109 BerlinGermany Shenzhen Institute for Quantum Science and Engineering and Department of PhysicsSouthern University of Science and TechnologyShenzhen 518055China Department of Physics and HKU-UCAS Joint Institute of Theoretical and Computational Physics The University of Hong KongPokfulam RoadHong KongChina Songshan Lake Materials Laboratory Dongguan 523808China

We systematically investigate the magnetic properties of Cu4-xZnx(OH)6FBr using the neutron diffraction and muon spin rotation and relaxation(μSR) ***-diffraction measurements suggest that the longrange magnetic order and the orthorhombic nuclear structure in the x=0 sample can persist up to x=0.23 and 0.43,*** temperature dependence of the zero-field μSR spectra provides two characteristic temperatures,TA0 and Tλ,which are associated with the initial drop close to zero time and the long-time exponential decay of the muon relaxation,*** between TA0 and TM from previously reported magnetic-susceptibility measurements suggest that the former comes from the short-range interlayer-spin clusters that persist up to x=*** the other hand,the doping level where Tλ becomes zero is about 0.66,which is much higher than threshold of the long-range order,i.e.,~*** results suggest that the change in the nuclear structure may alter the spin dynamics of the kagome layers and a gapped quantum-spin-liquid state may exist above x=0.66 with the perfect kagome planes.

关键词： relaxation rotation exponential

Broken Time-Reversal Symmetry in Superconducting Partially Filled Skutterudite Pr1-δPt4Ge12

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Chinese Physics Letters 2019年第10期36卷 72-76页

作者： Jia-Wei Zang Jian Zhang Zi-Hao Zhu Zhao-Feng Ding Kevin Huang Xiao-Ran Peng adrian Dhillier Lei Shu State Key Laboratory of Surface Physics Department of PhysicsFudan UniversityShanghai 200433 Geballe Laboratory for Advanced Materials Stanford UniversityStanfordCA 94305USA ISIS Facility STFC Rutherford Appleton LaboratoryHarwell Science and Innovation CampusChiltonDidcotOxon OX110QXUnited Kingdom Collaborative Innovation Center of Advanced Microstructures Nanjing 210093

Time reversal symmetry(TRS)is a key symmetry for classification of unconventional superconductors,and the violation of TRS often results in a wealth of novel *** we report the synthesis and superconducting properties of the partially filled skutterudite Pr1-δ*** results from x-ray diffraction and magnetization measurements show that the[Pt4 Ge12]cage-forming structure survives and bulk superconductivity is preserved below the superconducting transition temperature Tc = 7.80 *** temperature dependence of both the upper critical field and the electronic specific heat can be described in terms of a two-gap model,providing strong evidence of multi-band *** breaking is observed using zero Held muon-spin relaxation experiments,and the magnitude of the spontaneous field is nearly half of that in PrPt4Ge12.

关键词： properties filled breaking

A history of high-power laser research and development in the United Kingdom

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High Power Laser Science and Engineering 2021年第2期9卷 41-126页

作者： Colin N.Danson Malcolm White John R.M.Barr Thomas Bett Peter Blyth David Bowley Ceri Brenner Robert J.Collins Neal Croxford A.E.Bucker Dangor Laurence Devereux Peter E.Dyer Anthony Dymoke-Bradshaw Christopher B.Edwards Paul Ewart Allister I.Ferguson John M.Girkin Denis R.Hall David C.Hanna Wayne Harris David I.hillier Christopher J.Hooker Simon M.Hooker Nicholas Hopps Janet Hull David Hunt Dino A.Jaroszynski Mark Kempenaars Helmut Kessler Sir Peter L.Knight Steve Knight adrian Knowles Ciaran L.S.Lewis Ken S.Lipton Abby Littlechild John Littlechild Peter Maggs Graeme P.A.Malcolm OBE Stuart P.D.Mangles William Martin Paul McKenna Richard O.Moore Clive Morrison Zulfikar Najmudin David Neely Geoff H.C.New Michael J.Norman Ted Paine Anthony W.Parker Rory R.Penman Geoff J.Pert Chris Pietraszewski Andrew Randewich Nadeem H.Rizvi Nigel Seddon MBE Zheng-Ming Sheng David Slater Roland A.Smith Christopher Spindloe Roy Taylor Gary Thomas John W.G.Tisch Justin S.Wark Colin Webb S.Mark Wiggins Dave Willford Trevor Winstone AWE Aldermaston ReadingUK Oxford Centre for High Energy Density Science Department of PhysicsClarendon LaboratoryUniversity of OxfordOxfordUK Centre for Intertial Fusion Studies Blackett LaboratoryImperial College LondonLondonUK Formerly of Electrox LetchworthUK Formerly of Central Laser Facility Rutherford LaboratoryDidcotUK Formerly of Ferranti Defence Systems LincolnUK Leonardo EdinburghUK Retired AWEReadingUK Formerly of AWE ReadingUK Formerly of Laser Lines Ltd BanburyUK Formerly of Optilas Ltd Milton KeynesUK Retired Pro-Lite TechnologyCranfieldUK Specialised Imaging Ltd PitstoneUK Central Laser Facility STFC Rutherford Appleton LaboratoryDidcotUK Magna-Power Electronics Ltd ReadingUK DeBe Lasers Needham Laser TechnologiesWhitchurchUK Blackett Laboratory Imperial College LondonLondonUK SPIE Europe CardiffUK Professor Emeritus(Physics) University of HullKingston upon HullUK Kentech Instruments Ltd WallingfordUK Department of Physics Clarendon LaboratoryUniversity of OxfordOxfordUK Professor Emeritus Department of PhysicsUniversity of StrathclydeGlasgowUK Department of Physics Durham UniversityDurhamUK Professor Emeritus(Photonics) Heriot-Watt UniversityEdinburghUK Professor Emeritus University of SouthamptonSouthamptonUK Optical Surfaces Ltd KenleyUK JEH Lasers Ltd RugbyUK Scottish Universities Physics Alliance Department of PhysicsUniversity of StrathclydeGlasgowUK ITER Organization Saint-Paul-lez-DuranceFrance Manx Precision Optics Ltd BallasallaUK Laser Lines Ltd BanburyUK Elliot Scientific Ltd MetroTest Scientific GroupHarpendenUK Centre for Plasma Physics Queen’s University BelfastBelfastUK Retired Founderand former MDRofin-Sinar UK LtdHullUK Heraeus Noblelight Ltd CambridgeUK Mirli Books ChelmsfordUK M Squared Lasers Ltd GlasgowUK University of Hertfordshire HatfieldUK E&EO UK Ltd Barton-upon-HumberUK Department of Physics University of YorkYorkUK IC Optical Systems Ltd BeckenhamUK Laser Micromachining Ltd St AsaphUK MBDA UK Ltd Brist

The first demonstration of laser action in ruby was made in 1960 by *** of Hughes Research Laboratories,*** laboratories worldwide began the search for lasers using different materials,operating at different *** the UK,academia,industry and the central laboratories took up the challenge from the earliest days to develop these systems for a broad range of *** historical review looks at the contribution the UK has made to the advancement of the technology,the development of systems and components and their exploitation over the last 60 years.

关键词： high-power lasers history United Kingdom