报告题目：Integrated Synchrotron Infrared Facility for Optical Studies of Solid Hydrogen under Extreme P-T Conditions

报 告 人：Dr. Zhenxian Liu

Lead Beamline Scientist/research scientist.

Geophysical Laboratory.

Carnegie Institution of Washington.

摘要：As the most abundant chemical substance in the solar system and the simplest molecule with the most important chemical bond in nature, hydrogen under extreme P-T conditions has been of intensive theoretical and experimental interest over the past several decades . Theoretical studies predict fascinating properties of hydrogen, such as pressure-induced alkali-metal-like monatomic solid , an intriguing quantum behavior like high-temperature superconductivity and liquid ground-state at higher compressions . On the other hand, tremendous progress has been made in the experimental studies of solid hydrogen at ultrahigh pressures and broad temperature region resulting in new findings of exotic properties and rich/complicated phase diagram . Micro-spectroscopic techniques including synchrotron infrared (IR), Raman scattering, and visible absorption are powerful probes to investigate the chemical bonding, phase transitions including the metallic phase of hydrogen under extreme P-T conditions. This presentation will overview recent developments on hydrogen studies including the techniques developed at the synchrotron IR facilities, Brookhaven National Laboratory and new results.

报告人简介：Zhenxian Liu is a lead beamline scientist for the Frontier Synchrotron Infrared Spectroscopy Beamline under Extreme Conditions (FIS), currently under construction at National Synchrotron Light Source II, Brookhaven National Laboratory. FIS is the successor of U2A beamline, a dedicated high-pressure infrared diamond anvil cell facility at NSLS, which has been managed by Geophysical Laboratory since 1999. He develops novel experimental techniques (e.g., vacuum far-IR spectroscopy down to 30 cm-1 at high pressure) and assists users in carrying out research projects in geoscience, planetary science, materials science, condensed matter physics, chemistry, and biology. He also uses synchrotron infrared spectroscopy, Raman scattering, photoluminescence as well as synchrotron x-ray diffraction techniques to explore physical and chemical properties and phase transitions of hydrous minerals, simple molecular systems, and nanoscale materials at high pressures and variable temperatures.

地 点：前卫南区唐敖庆楼C区603报告厅

时 间：2016年11月30日（周三）上午9:30

举办单位：超硬材料国家重点实验室

物理学院

吉林省物理学会

中国物理学会高压物理专业委员会