我们在上海光源的红外同步加速器上进行了295 K ~ 280 GPa范围内氢的拉曼和红外光谱测量。为了达到最高压力，将氢装载到具有40微米中心底脚的环形金刚石砧中。分子间的耦合已被确定通过伴随测量的IR和拉曼振子模式。在相IV中，我们发现与缩短分子的Br 2样层相比，在细长分子的石墨烯（G）样层中的分子间耦合强得多，并且与Br 2层相比，在G层中其随压力的增加快得多。这些异质晶格动力学性质是高流动氢相IV的独特特征。
英文摘要：
We performed Raman and infrared (IR) spectroscopy measurements of hydrogen at 295 K up to 280 GPa at an IR synchrotron facility of SSRF. To reach the highest pressure, hydrogen was loaded into toroidal diamond anvils with 40 micrometers central culet. The intermolecular coupling has been determined by concomitant measurements of the IR and Raman vibron modes. In phase IV, we find that the intermolecular coupling is much stronger in the graphene (G) like layer of elongated molecules compared to the Br2 like layer of shortened molecules and it increases with pressure much faster in the G layer compared to the Br2 layer. These heterogeneous lattice dynamical properties are unique features of highly fluxional hydrogen phase IV.
Local intermolecular structure, hydrogen bonding and related dynamics in the liquid cis/trans N-methylformamide mixture: A density functional theory based Born-Oppenheimer molecular dynamics study
Enhanced reversible barocaloric effect at low pressure in neopentyl plastic crystal solid solutions
University of Glasgow（格拉斯哥大学）；University of Cambridge（剑桥大学）；Institut Laue Langevin（朗之万研究所）；Universitat Politecnica de Catalunya（加泰罗尼亚理工大学）；Diamond Light Source（钻石光源）
