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Growth of well-ordered iron sulfide thin films

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Davis,  Earl
Chemical Physics, Fritz Haber Institute, Max Planck Society;

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Berti,  Giulia
Chemical Physics, Fritz Haber Institute, Max Planck Society;

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Kuhlenbeck,  Helmut
Chemical Physics, Fritz Haber Institute, Max Planck Society;

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Freund,  Hans-Joachim
Chemical Physics, Fritz Haber Institute, Max Planck Society;

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Citation

Davis, E., Berti, G., Kuhlenbeck, H., Vonk, V., Stierle, A., & Freund, H.-J. (2019). Growth of well-ordered iron sulfide thin films. Physical Chemistry Chemical Physics, 21(36), 20204-20210. doi:10.1039/C9CP04157E.


Cite as: https://hdl.handle.net/21.11116/0000-0004-E1E4-C
Abstract
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.