Coverage evolution of the unoccupied Density of States in sulfur superstructures on Ru(0001)

Pisarra, M. and Bernardo Gavito, Ramon and Navarro, Juan Jesús and Black, Andrés and Diaz, Cristina and Calleja, Fabián and Granados, Daniel and Miranda, Rodolfo and Martin, Fernando and Vázquez De Parga, Amadeo L. (2018) Coverage evolution of the unoccupied Density of States in sulfur superstructures on Ru(0001). Applied Surface Science, 433. pp. 300-305. ISSN 0169-4332

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Sulfur adsorbed on Ru(0001) presents a large number of ordered structures. This characteristic makes S/Ru(0001) the ideal system to investigate the effect of different periodicities on the electronic properties of interfaces. We have performed scanning tunneling microscopy/spectroscopy experiments and density functional theory calculations showing that a sulfur adlayer generates interface states inside the Γ directional gap of Ru(0001) and that the position of such states varies monotonically with sulfur coverage. This is the result of the interplay between band folding effects arising from the new periodicity of the system and electron localization on the sulfur monolayer. As a consequence, by varying the amount of sulfur in S/Ru(0001) one can control the electronic properties of these interfacial materials.

Item Type:
Journal Article
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Applied Surface Science
Additional Information:
This is the author’s version of a work that was accepted for publication in Applied Surface Science. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Applied Surface Science, 433, 2018 DOI: 10.1016/j.apsusc.2017.10.069
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16 Oct 2017 12:34
Last Modified:
21 Sep 2023 02:15