AI 中文总结
本研究实现了在多种不同类型衬底上高质量外延生长α-MnTe薄膜，分析了衬底对其性能的影响及表面超结构的形成，为该材料在自旋电子学领域的应用奠定基础。
AI 中文摘要
具有六方α-MnTe晶体结构的碲化锰（MnTe）已成为反常磁领域的主力材料之一，其薄膜合成对基础科学和器件应用均具有重要意义。本文报道了MnTe薄膜及异质结构的外延生长，通过X射线衍射、电子衍射及软X射线角分辨光电子能谱对薄膜进行表征，证实可在多种衬底上生长高质量α-MnTe，涵盖透明带隙绝缘体、拓扑绝缘体、金属过渡金属硫族化合物乃至范德华铁磁体Fe₃GeTe₂。绝缘衬底适用于输运实验或光谱学，金属拓扑表面态可触发自旋轨道转矩等自旋电子学界面效应，金属衬底有助于避免电子光谱或显微技术中绝缘MnTe薄膜的充电问题，铁磁衬底则有望调控界面处的磁化。此外，本文还讨论了MnTe(0001)表面超结构的形成，该超结构在生长后直接出现、碲蒸发后及热处理后均会产生，这对进一步研究α-MnTe的表面磁结构与电子结构具有重要意义。
英文摘要
Manganese telluride (MnTe) in its hexagonal α-MnTe crystal structure has evolved as one of the altermagnet workhorse materials. The synthesis of MnTe thin films is highly relevant for both fundamental science and device applications. Here, we report on the epitaxial growth of MnTe thin films and heterostructures. The films are studied by X-ray and electron diffraction as well as soft X-ray angle-resolved photoemission spectroscopy. We demonstrate the ability to grow high-quality α-MnTe on various substrates, ranging from transparent band insulators, over topological insulators, metallic transition metal chalcogenides, to the van der Waals ferromagnet Fe$_3$GeTe$_2$. While insulating substrates are useful for transport experiments or optical spectroscopy, metallic topological surface states may trigger spintronic interface effects, such as spin-orbit torques. Metallic substrates, in general, are highly relevant to avoid charging at the insulating MnTe films in electron spectroscopy or microscopy methods. Lastly, ferromagnetic substrates will be of interest to control magnetization across the interface. In addition, we discuss the formation of superstructures on the MnTe(0001) surfaces, that emerge directly after growth, upon subsequent tellurium evaporation and after thermal treatment. This will be relevant in further studying the surface magnetic and electronic structure in α-MnTe.
