报告时间：2019年4月25日（星期四）下午16:00
报告地点：能源楼（A座）1楼会议室
报告人：徐伟，中国科学院高能物理研究所
报告摘要：
The physical and or chemical properties of materials, either synthetic or natural, are intrinsically related with the atomic, electronic structure as well as the evolution/dynamics of the structure under certain conditions. The state-of-the-art characterizing tools enable one to visualize the structures from microscopic down to atomic scales. However, one has to dig deeper to understand the electronic structure, lattice dynamics even nuclear hyperfine structures to decipher the mystery of various systems from minerals to chemicals.
Many spectroscopic techniques available at synchrotron radiation (SR) facilities or Free-electron lasers offer unique perspectives to the structures as well as dynamics of various systems. Unlike conventional characterizing tools using lab-based equipment, the SR techniques are not straight-forward but sophisticated. In this talk I will introduce several important spectroscopic methods in the area of chemical and materials science. The X-ray Absorption Fine structure spectroscopy enables the extraction of fine atomic structure surrounding the absorber or the local electronic structure. By contrast, the Nuclear Resonant Scattering (NRS) techniques as distinct spectroscopy provide a new perspective over lattice dynamics as well as nuclear hyperfine structure. Some derivative techniques including the X-ray Raman spectroscopy, Resonant inelastic X-ray scattering, etc provide unique information regarding the electronic structure/dynamics.
The ultra-bright High Energy Photon Source (HEPS), 4th generation storage ring, will built at Huairou science city in the next years. As one of the 14 PHASEI beamline at HEPS, the HXHERS beamline will deliver techniques including NRS, XRS and RIXS. A successful user program relies on unification of scientific motivations, solid instrumental development and valid data.
报告人简介：
徐伟，中国科学院高能物理研究所副研究员。“十三五”国家重大科技基础设施-高能同步辐射光源-高分辨谱学线站负责人。“十二五”国家重大科技基础设施-高能同步辐射光源验证装置-高能量分辨单色器系统负责人。
2001年就读于哈尔滨理工大学材料物理，2005获材料物理学理学学士学位。2005年进入中国科学院高能物理研究所读研，2010年获凝聚态物理学理学博士学位。2008年2月至12月，受意大利政府奖学金资助，赴意大利核物理研究院弗拉斯卡蒂国家实验室(INFN-LNF), 在资深研究员Augusto Marcelli教授指导下，设计了世界上首条红外和X射线联用光束线。
2010年任中国科学院高能物理研究所助理研究员。2012年7月晋升为中国科学院高能物理研究所副研究员。2012年6月至12月, 访问BNL-NSLSII光源IXS线站、ANL-APS光源NRS线站。2015年10月应邀成为欧洲罗马国际材料科学研究中心RICMASS(http://www.ricmass.eu/)会员。2016年10月获国际会议ACSIN2016青年科学家奖。
主要围绕同步辐射方法、应用及设备开展研究：1）结合第一性原理计算，同步辐射谱学 （如X射线吸收谱学、红外光谱学、核共振散射谱学等）在热电等功能材料中的应用研究; 2)同步辐射实验方法学的开发（联用红外、X射线谱学技术、核共振非弹性散射）; 3)同步辐射光学器件(高能量分辨单色器)研制。在Journal of Materials Chemistry A, Journal of Synchrotron Radiation, Physical Chemistry Chemical Physics, Advanced Energy Materials, ACS Applied Materials & Interfaces, Inorganic Chemistry 等期刊发表论文80余篇。
联系人：DNL2005 格日乐
联系电话：9711
