Structural investigations conducted using transmission electron microscopy (TEM) on LuH synthesized under atmospheric pressure (AP-LuH) and nitrogen-doped LuH synthesized under high pressure (HP-LuH) have revealed numerous microstructural phenomena. Both materials show a clear superstructure modulation with wave vector, , and this modulation can be interpreted by the displacements of Lu atoms. Further investigations on the nitrogen-doped HP-LuH materials reveal the appearance of high-density antiphase boundaries, in particular, domain walls of a few atomic layer thickness without structural modulation can be observed, suggesting possible interface properties could be detected in this system. TEM observations of AP-LuH suggest that no evident structural phase transition occurs between 94 K and 673 K.

中文翻译：

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通过透射电子显微镜观察二氢化镥 LuH2 的微观结构和结构调制

使用透射电子显微镜 (TEM) 对大气压下合成的 LuH (AP-LuH) 和高压下合成的氮掺杂 LuH (HP-LuH) 进行结构研究，揭示了许多微观结构现象。两种材料都表现出明显的波矢调制，并且这种调制可以通过 Lu 原子的位移来解释。对氮掺杂 HP-LuH 材料的进一步研究揭示了高密度反相边界的出现，特别是可以观察到几个原子层厚度的没有结构调制的畴壁，这表明可以在该系统中检测到可能的界面特性。AP-LuH 的 TEM 观察表明，在 94 K 和 673 K 之间没有发生明显的结构相变。