论文标题
新的氮的扩展固体证据
Evidence for a new extended solid of nitrogen
论文作者
论文摘要
通过将分层 - 聚合物氮（LP-N）进一步加热到161 GPA的2300 K以上，可以观察到一种新的延长固氮，该氮是指层后聚合物氮（PLP-N）。发现新阶段非常透明，并在172 GPA时表现出从2.8至4.9Å不等的超大d间距，这表明可能具有宽带的大型单位2D链样或0D群集型结构。但是，观察到的X射线衍射模式和拉曼散射数据不能匹配已发表的文献中的任何预测结构。这一发现进一步使氮的相图复杂化，还突出了氮中高压解离跃迁的路径依赖性。另外，已经确定了CG-N和LP-N之间的形成边界。
A new extended solid nitrogen, referred to post-layered-polymeric nitrogen (PLP-N), was observed by further heating the layered-polymeric nitrogen (LP-N) to above 2300 K at 161 GPa. The new phase is found to be very transparent and exhibits ultra-large d-spacings ranging from 2.8 to 4.9 Å at 172 GPa, suggesting a possible large-unit-cell 2D chain-like or 0D cluster-type structure with wide bandgap. However, the observed X-ray diffraction pattern and Raman scattering data cannot match any predicted structures in the published literature. This finding further complicates the phase diagram of nitrogen and also highlights the path dependence of the high-pressure dissociative transition in nitrogen. In addition, the forming boundary between cg-N and LP-N has been determined.
