Crystallography of low Z material at ultrahigh pressure:Case study on solid hydrogen

作     者：Cheng Ji Bing Li Wenjun Liu Jesse S.Smith Alexander Bjoorling Arnab Majumdar Wei Luo Rajeev Ahuja Jinfu Shu Junyue Wang Stanislav Sinogeikin Yue Meng Vitali B.Prakapenka Eran Greenberg Ruqing Xu Xianrong Huang Yang Ding Alexander Soldatov Wenge Yang Guoyin Shen Wendy L.Mao Ho-Kwang Mao Cheng Ji;Bing Li;Wenjun Liu;Jesse S.Smith;Alexander Bj?rling;Arnab Majumdar;Wei Luo;Rajeev Ahuja;Jinfu Shu;Junyue Wang;Stanislav Sinogeikin;Yue Meng;Vitali B.Prakapenka;Eran Greenberg;Ruqing Xu;Xianrong Huang;Yang Ding;Alexander Soldatov;Wenge Yang;Guoyin Shen;Wendy L.Mao;Ho-Kwang Mao

作者机构：Center for High Pressure Science and Technology Advanced ResearchBeijing 100094China High Pressure Collaborative AccessTeamGeophysical LaboratoryCarnegie Institution of WashingtonArgonneIllinois 60439USA Center for the Study of Matter at Extreme Conditions and Department of Mechanical and Materials EngineeringFlorida International UniversityMiamiFlorida 33199USA Advanced Photon SourceArgonne National LaboratoryLemontIllinois 60439USA HPCATX-Ray Science DivisionArgonne National LaboratoryLemontIllinois 60439USA MAX IV LaboratoryLund University22100 LundSweden Condensed Matter Theory GroupMaterials Theory DivisionDepartment of Physics and AstronomyUppsala UniversityUppsala S-75120Sweden Center for Advanced Radiation SourcesUniversity of ChicagoChicagoIllinois 60637USA Department of Engineering Sciences and MathematicsLule°a University of Technology97187 Lule°aSweden Department of Geological SciencesStanford UniversityStanfordCalifornia 94305USA Stanford Institute for Materials and Energy SciencesSLAC National Accelerator LaboratoryMenlo ParkCalifornia 94025USA 

出 版 物：《Matter and Radiation at Extremes》 (极端条件下的物质与辐射（英文）)

年 卷 期：2020年第5卷第3期

页      面：40-54页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：This research was supported by the National Natural Science Foundation of China under Award No.U1930401 the Department of Energy(DOE),Office of Basic Energy Science,Division of Materials Sciences and Engineering under Award No.DE-FG02-99ER45775 

主　　题：ultrahigh solid eventually 

摘      要：Diamond anvil cell techniques have been improved to allow access to the multimegabar ultrahigh-pressure region for exploring novel phenomena in ***,the onlyway to determine crystal structures of materials above 100 GPa,namely,X-ray diffraction(XRD),especially for lowZ materials,remains nontrivial in the ultrahigh-pressure region,even with the availability of brilliant synchrotron X-ray *** thiswork,we performa systematic study,choosing hydrogen(the lowest X-ray scatterer)as the subject,to understand how to better perform XRD measurements of low Z materials at multimegabar *** techniques that we have developed have been proved to be effective in measuring the crystal structure of solid hydrogen up to 254GPa at room temperature[*** et al.,Nature 573,558–562(2019)].Wepresent our discoveries and experienceswith regard to several aspects of thiswork,namely,diamond anvil selection,sample configuration for ultrahigh-pressure XRDstudies,XRDdiagnostics for low Z materials,and related issues in data interpretation and pressure *** that these methods can be readily extended to other low Z materials and can pave the way for studying the crystal structure of hydrogen at higher pressures,eventually testing structural models of metallic hydrogen.