Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin, Germany.
Phys Chem Chem Phys. 2019 Sep 18;21(36):20204-20210. doi: 10.1039/c9cp04157e.
In this paper a growth recipe for well-ordered iron sulfide films and the results of their characterisation are presented. The film was studied using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), low energy electron diffraction (LEED), and scanning tunneling microscopy (STM). XRD data reveal that the film has a NiAs-like structure with Fe vacancies, similar to iron sulfides such as pyrrhotite and smythite, although no indication of any ordering of these vacancies was observed. LEED and STM results show that the film exhibits a 2 × 2 surface reconstruction. XPS data provide additional evidence for a large number of Fe vacancies, and the oxidation states of the Fe and S in the film are analysed.
本文提出了一种制备有序硫化亚铁薄膜的生长方案，并对其进行了特性研究。采用 X 射线衍射（XRD）、X 射线光电子能谱（XPS）、低能电子衍射（LEED）和扫描隧道显微镜（STM）对薄膜进行了研究。XRD 数据表明，该薄膜具有 NiAs 型结构，存在铁空位，类似于磁黄铁矿和硫铁矿等硫化铁，尽管没有观察到这些空位的任何有序排列。LEED 和 STM 结果表明，薄膜呈现出 2×2 的表面重构。XPS 数据进一步证实了大量的铁空位，同时分析了薄膜中铁和硫的氧化态。
