论文标题
高于300 k的氢的实验相变映射，最高300 GPA
Experimental phase transition mapping for hydrogen above 300 K up to 300 GPa
论文作者
论文摘要
在原位高压温度条件下使用钻石砧细胞技术获得的大量拉曼光谱数据已用于映射温度范围300 K至900 K的氢的相变，最大压力高达300 gigapascal，这是大多数相位信息的压力 - 植物区域，这是以前未知的。分子内振动拉曼氢模式的频率和峰宽度的等温依赖性是基于数千个数据文件建立的，这些数据文件是在数百个独立的高压温度实验运行中测量的。压力和温度依赖性不连续频率和峰值宽度，以及观察到的拉曼模式的外观或消失。这些过渡数据显示出自一致性，已用于概述13个相变边界和15个可能的阶段。这种庞大的，多样化的光谱行为表明，在这个压力温度的区域中可能存在令人惊讶的丰富和复杂的相变。
A vast amount of Raman spectroscopic data, obtained using diamond anvil cell technique under in situ high pressure-temperature conditions, has been used for mapping the phase transitions of hydrogen in the temperature range of 300 K to 900 K and pressure up to 300 gigapascal, a pressure-temperature region in which most phase information was unknown previously. The isothermal and isobaric dependencies in frequency and peak width for intramolecular vibration Raman mode of hydrogen are established based on thousands of data files which are measured during hundreds of independent high pressure-temperature experimental runs. Discontinuities of pressure and temperature dependencies in frequency and peak-width, together with appearance or disappearance of observed Raman modes were obtained. Those transition data show self-consistency and have been used for outlining 13 phase transition boundaries and 15 possible phases. This large, diversified behavior of spectra demonstrates that surprisingly rich and complicated phase transitions may exist in this pressure-temperature region.
