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Chiral Pair Density Waves with Residual Fermi Arcs in RbV3Sb5

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chinese physics letters 2024年第9期41卷 88-92页

作者： xiao-Yu Yan Hanbin Deng Tianyu Yang Guowei liu Wei Song Hu Miao Zhijun Tu Hechang lei Shuo Wang Ben-Chuan lin Hailang Qin Jia-Xin Yin Department of physics Southern University of Science and TechnologyShenzhen 518055China Materials Science and Technology Division Oak Ridge National LaboratoryOak RidgeTennessee 37831USA beijing key {2. of Optoelectronic Functional Materials MicroNano Devices Department of PhysicsRenmin University of ChinaBeijing 100872China key laboratory of Quantum State Construction and Manipulation(Ministry of Education) Renmin University of ChinaBeijing 100872China Shenzhen Institute for Quantum Science and Engineering Southern University of Science and TechnologyShenzhen 518055China Guangdong Provincial key laboratory of Quantum Science and Engineering Southern University of Science and TechnologyShenzhen 518055China Quantum Science Center of Guangdong-Hong Kong-Macao Greater Bay Area Shenzhen 518055China

The chiral 2.2.charge order has been reported and confirmed in the kagome superconductor RbV3Sb5,while its interplay with superconductivity remains elusive owing to its lowest superconducting transition temperature Tc of about 0.85K in the AV3Sb5 family(A=K,Rb,Cs)that severely challenges electronic spectroscopic ***,utilizing dilution-refrigerator-based scanning tunneling microscopy down to 30 mK,we observe chiral 2.2.pair density waves with residual Fermi arcs in *** find a superconducting gap of 150eV with substantial residual in-gap *** spatial distribution of this gap exhibits chiral 2.2.modulations,signaling a chiral pair density wave(PDW).Our quasi-particle interference imaging of the zero-energy residual states further reveals arc-like *** discuss the relation of the gap modulations with the residual Fermi arcs under the space-momentum correspondence between PDW and Bogoliubov Fermi states.

关键词： Fermi chiral utilizing

Experimental study of the influencing factors and mechanisms of the pressure-reduction and augmented injection effect by nanoparticles in ultra-low permeability reservoirs

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Petroleum Science 2024年第3期21卷 1915-1927页

作者： Pan Wang Yu-Hang Hu liao-Yuan Zhang Yong Meng Zhen-Fu Ma Tian-Ru Wang Zi-lin Zhang Ji-Chao Fang xiao-Qiang liu Qing You Yan Zhang beijing key {2. of Unconventional Natural Gas Geological Evaluation and Development Engineering China University of Geosciences(Beijing)Beijing100083China School of energy Resources China University of Geosciences(Beijing)Beijing100083China Petroleum Engineering Technology Research Institute Sinopec Shengli Oilfield CompanyDongying257000ShandongChina Hekou Oil Production Plant Sinopec Shengli Oilfield CompanyDongying257200ShandongChina Petroleum Exploration and Production Research Institute SINOPECBeijing102206China CNPC Engineering Technology R&D Company limited Beijing102206China

Nanoparticles(NPs)have gained significant attention as a functional material due to their ability to effectively enhance pressure reduction in injection processes in ultra-low permeability *** are typically studied in controlled laboratory conditions,and their behavior in real-world,complex environments such as ultra-low permeability reservoirs,is not well understood due to the limited scope of their *** study investigates the efficacy and underlying mechanisms of NPs in decreasing injection pressure under various injection conditions(2.—85℃,10—2. MPa).The results reveal that under optimal injection conditions,NPs effectively reduce injection pressure by a maximum of 2..77%in core *** pressure reduction rate is found to be positively correlated with oil saturation and permeability,and negatively correlated with temperature and ***,particle image velocimetry(PIV)experiments(2.℃,atmospheric pressure)indicate that the pressure reduction is achieved by NPs through the reduction of wall shear resistance and wettability *** work has important implications for the design of water injection strategies in ultra-low permeability reservoirs.

关键词： Nanoparticle Pressure reduction Augmented injection Ultra-low permeability reservoir

Weak Merging Scenario of ClASH Cluster A2.9

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Research in Astronomy and astrophysics 2024年第4期24卷 174-182页

作者： Wen-Cheng Feng Heng Yu Hai-Hui Zhao xiao-lan Hou Shu-Mei Jia Cheng-Kui li Yu-lin Cheng Paolo Tozzi Ming Sun Yong Chen Department of physics and Institute of Theoretical physics Nanjing Normal UniversityNanjing 210023China key laboratory of {2. astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China Department of Astronomy Beijing Normal UniversityBeijing 100875China Department of Astronomy Yunnan UniversityKunming 650091China INAF—Osservatorio Astrofisico di Arcetri Largo E.Fermi50122 FirenzeItaly Department of Astronomy University of VirginiaP.O.Box 400325CharlottesvilleVA 22904-4325USA

We study the structural and dynamical properties of A2.9 based on Chandra and XMM-Newton *** obtain detailed temperature,pressure,and entropy maps with the contour binning method,and find a hot region in the NW *** X-ray brightness residual map and corresponding temperature profiles reveal a possible shock front in the NW direction and a cold front feature in the SE *** with the galaxy luminosity density map we propose a weak merger scenario.A young sub-cluster passing from the SE to NW direction could explain the optical subpeak,the intracluster medium temperature map,the X-ray surface brightness excess,and the X-ray peak offset together.

关键词： X rays:galaxies:clusters galaxies:clusters:intracluster medium galaxies:clusters:Abell 2.9

烧结程度对CaO固硫反应转化率及动力学参数的影响

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燃料化学学报 2001年第3期29卷 273-276页

作者：武增华寇鹏杨海波陈昌和清华大学化学系清华大学热能系北京100084

The conversion and kinetic parameters of desulfurizors of CaO of different particle agglomeration degree are investigated with themogravimetric method (TG). The results showed that the CaO particle agglomeration degree increases when CaO calcined temperature or time increases. The dusulfurizors that have {2.er particle agglomeration degree have low conversion in the desulfurization reaction. The kinetic behavior of desulfurization can be explained by a grain model. The activity energies of suface reaction (E a) and of product layer diffusion (E p) were determined by using the grain model. The overall rates of desulfurization are controlled initially by surface chemical reaction, and then shift to product layer diffusion control. The activity energy of surface reaction (E a) enhances when the CaO particle agglomeration degree increases.

关键词：烧结固硫反应动力学煤燃烧氧化钙转化率固硫剂环境保护活化能

Probing the Gamma-Ray Emission Region of Five TeV Flat Spectrum Radio Quasars

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Research in Astronomy and astrophysics 2024年第6期24卷 156-169页

作者： Hu-Bing xiao Hai-Tao Cao Rui Xue Jin-Ting Cai Ge-Ge Wang Marina Manganaro Shao-Hua Zhang Zhi-Hao Ouyang li-Ping Fu Jun-Hui Fan Shanghai key lab for astrophysics Shanghai Normal UniversityShanghai 200234China School of Information Engineering Guangzhou Panyu PolytechnicGuangzhou 511483China Department of physics Zhejiang Normal UniversityJinhua 321004China College of Mathematics and physics Guangxi Minzu UniversityNanning 530006China key laboratory of Cosmology and {2.(liaoning) College of SciencesNortheastern UniversityShenyang 110819China Department of physics University of RijekaRijeka 51000Croatia Center for astrophysics Guangzhou UniversityGuangzhou 510006China key laboratory for Astronomical Observation and Technology of Guangzhou Guangzhou 510006China Astronomy Science and Technology Research laboratory of Department of Education of Guangdong Province Guangzhou 510006China

The location ofγ-ray emission of blazars remains a contested topic,inspiring the development of numerous investigative techniques to address this *** this work,we analyzed Fermiγ-ray light curves in the GeV and MeV bands,employing the discrete cross-correlation function method to discern time lags between the two *** 4C+2..35,Ton 599,B2.42.+32.and PKS 1510-089,we identified a time lag spanning several days,while for PKS 1441+2.,the time lag was not statistically *** results imply that the soft photons necessary for inverse Compton scattering predominantly originate from the dusty torus in the first four sources,whereas for PKS1441+2.,they seem to be sourced mainly from the broad-line *** analysis of the opacity(τγγ)and the GeV spectra study supports the conclusion that the location of the dissipation region must be beyond the BlR to avoid significant ***,for PKS 1441+2.,the emission region is also posited to lie outside yet proximate to the *** parameters of describing the emission region were obtained by fitting broadband spectral energy distribution with contemporaneous observation *** findings suggest that for the five TeV FSRQs,during Te V flaring events,the jet appears to maintain an equilibrium between the energy density of the magnetic field and that of the {2.s for all investigated sources,with the exceptions of 4C+2..35 and PKS1441+*** terms of the overall jet power,{2. energy is the dominant contributor,and the observed blazar radiation cannot be solely attributed to the magnetic field,except in the case of 4C+***,magnetic reconnection is unlikely to be the primary mechanism behind {2. acceleration in these systems.

关键词： galaxies:active gamma-rays:galaxies galaxies:jets

Preparation and microstructure of the FeS film by low temperature ion sulfuruzing technique

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Preparation and microstructure of the FeS film by low temper...

Study of Magnetosphere Shielding Effect with Energetic particles Data from Chang’E-1

Fifth International Conference on Surface Engineering

作者： J.J.Kang1 2.G.l.li1 H.D.Wang2.B.S.Xu2.J.J.liu3 l.N.Zhu1 2.1 College of Materials Science and Engineering Hebei University of Technology Tianjin 300130 China 2.National key lab for Remanufacturing academy of Armored Forces Engineering 100072.{2. China 3 Department of Mechanical Engineering Tsinghua University {2. 100084 China

In this study,solid lubrication FeS film was made on the surface of AISI 1045 steel by low temperature ion *** was used to observe the surface and cross-section morphologies of FeS *** element components on the surface were analyzed by X-ray energy *** phases were determined by XRD;X-ray stress determinator was utilized to measure the residual *** nano-hardness and elastic modulus of FeS film were surveyed by nano-indentation *** results showed that the surface of FeS film was piled up geometrically by plenty of minute spherical *** grain size and distribution were both *** particle diameters ranged from 50 nm to 100 *** film was loose,with lots of micropores and well *** cross-section morphology of FeS film was a black layer with thickness of 4 μ*** interface between FeS film and substrate was jagged,and there was not visible transition *** bonding strength between FeS film and the substrate was quite *** sulfurized layer was mainly composed of FeS,a small quantity of FeS2.was also *** supersaturation of sulfur element leads to the appearance of *** is an effective solid *** had a close-packed hexagonal structure,with {2. melting point and low shearing *** residual compressive stress measured was-150 *** cracks and delaminations were not *** was attributed to the proper compressive *** residual stress was possibly related to the deposition parameters,such as the gas pressure,lower temperature and proper sulfurizing *** FeS film had an uneven hardness *** average value of nano-hardness and elastic modulus were 4.02.GPa,157.36 GPa,*** film was comparatively soft that was related to its ***,the texture was quite ***,the atomic arrangement was non-compact,which made the dislocation move *** the hardness was *** film had low elastic modulus compared to the subs

关键词： low temperature ion sulfuration Solid lubrication FeS film Microstructure

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Study of Magnetosphere Shielding Effect with Energetic Parti...

Progress of GECAM Observation Research

第十四届全国日地空间物理学术研讨会

作者： Wang Jie1 Gang Qin1 (State key laboratory of Space Weather, Center for Space Science and Applied Research ,{2. 100190)

About one fourth of lunar orbit is inside the terrestrial magnetosphere. Whether earth’s magnetosphere provides any substantial magnetic shielding at the Moon’s orbit or not is essential for preparing human explorations on lunar bases. However, there are conflicting results about the shielding from different authors either with theoretical modeling or analysis of spacecraft data （e.g., Winglee and Harnett, GRl, 2.07;Huang et al. GRl, 2.09;and Case et al. GRl, 2.10）. Chang’E-1 is in a polar orbit approximately 2.0 km above the Moon’s surface. Analyzing the data of the high-energy {2. detector on Chang’E-1 may help us determine if there is strong shielding in lunar orbit. In our work, we will compare the flux of the protons of different energy channels inside and outside of the Earth’s magnetosphere, and try to find whether there is a significant decrease in the flux of the protons of different energy channels when the Moon is within the Earth’s magnetotail.

关键词：

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空间科学学报 2024年第4期44卷 668-673页

作者： WANG Chenwei ZHANG Yanqiu XIONG Shaolin lIU Jiacong TAN Wenjun xiao Shuo XIE Shenglun XUE Wangchen ZHAO Haisheng ZHAO Yi ZHENG Chao key laboratory of {2. astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049 University of chinese academy of sciences Beijing 100049 Guizhou Normal University Guizhou 550025 Central China Normal University Wuhan 4300795 Dezhou University Dezhou 253023

Gravitational wave high-energy Electromagnetic Counterpart All-sky Monitor(GECAM)is a constellation with four instruments(launch date):GECAM-A/B(10 December 2.2.),GECAM-C(2. July 2.2.)and GECAM-D(13 March 2.2.),which are dedicated to monitoring gamma-ray transients in *** primary science objectives of GECAM include Gamma-Ray Bursts(GRBs),Soft Gamma-ray Repeaters(SGRs),high energy counterparts of Gravitation Wave(GW)and Fast Radio Burst(FRB),Solar Flares(SFls),as well as Terrestrial Gamma-ray Flashes(TGFs)and Terrestrial Electron Beams(TEBs).A series of observations and research have been made since the launch of GECAM-A/*** observations provide new insights into these highenergy transients,demonstrating the unique role of GECAM in the“multi-wavelength,multi-messenger”era.

关键词： GECAM Gravitational wave electromagnetic counterpart high energy transients

Searching for the highest energy of Pulsation and Critical luminosity of Swift J02.3.6+612. Observed by Insight-HXMT

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Research in Astronomy and astrophysics 2024年第5期24卷 61-69页

作者： Qing-Xia Zhao Xian Hou Ming-Yu Ge Shuang-Nan Zhang Yun-Xiang xiao You-li Tuo Zi-Xu Yang ling-Da Kong Jin-lu Qu Shu Zhang Jian-Cheng Wang Yunnan Observatories Chinese Academy of SciencesKunming 650216China key laboratory of {2. astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of chinese academy of sciences ChineseAcademy of SciencesBeijing 100049China key laboratory for the Structure and Evolution of Celestial Objects Chinese Academy of SciencesKunming 650216China Institut fur Astronomic und Astrophysik Sand 1D-72076 TabingenGemany School of physics and Optoelectronic Engineering Shandong University of TechnologyZibo 255000China

Owing to the broad energy coverage of Insight-HXMT in the hard X-ray band,we detected the highest energy of pulsation exceeding 2.0 keV around the 2.17–2.18 outburst peak of the first Galactic pulsating ultraluminous X-ray source (PUlX) Swift J02.3.6+612.,which is the highest energy detected from PUlXs to *** also obtained the highest energy of pulsation of every exposure during the outburst in 2.17–2.18,and found the highest energy is roughly positively correlated with *** our newly developed method,we identified the critical luminosity being 4×10^(38)erg s^(-1) when the main peaks of the low and high energy pulse profiles became aligned,which separates the fan-beam dominated and pencil-beam dominated accretion *** the critical luminosity,the phase of the main peak shifted gradually from 0.5 to 0.8 until the outburst peak in al energy bands is reached,which is in agreement with the phase shift found previously at low *** result is consistent with what is derived from spectral analysis.

关键词： (stars:)pulsars-individual(Swift J02.3.6+612.)-X-rays binaries–stars neutron