Electronic Properties of Sulfur Covered Ru(0001) Surfaces

Pisarra, M. and Diaz, Cristina and Bernardo Gavito, Ramon and Navarro, Juan Jesús and Black, Andrés and Calleja, Fabián and Granados, Daniel and Miranda, Rodolfo and Vázquez De Parga, Amadeo L. and Martin, Fernando (2018) Electronic Properties of Sulfur Covered Ru(0001) Surfaces. Journal of Physical Chemistry A, 122 (8). pp. 2232-2240. ISSN 1089-5639

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The structural properties of sulfur superstructures adsorbed on Ru(0001) have been widely studied in the past. However, much less effort has been devoted to determine their electronic properties. To understand the connection between structural and elec- tronic properties, we have carried out density functional theory periodic boundary calculations mimicking the four long range ordered sulfur superstructures identified experimentally by means of scanning tunneling microscopy (STM) techniques. Our simulations allow us to characterize the nature of the sulfur-Ru bond, the charge trans- fer between the Ru substrate and the sulfur adlayers, the interface states, as well as a parabolic state recently identified in STM experiments. A simple analysis, based on a one-dimensional model, reveals that this parabolic state is related to a potential well state, formed in the surface when the concentration of sulfur atoms is large enough to generate a new minimum in the surface potential.

Item Type:
Journal Article
Journal or Publication Title:
Journal of Physical Chemistry A
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This document is the Accepted Manuscript version of a Published Work that appeared in final form in The Journal of Physical Chemistry A, copyright ©2018 American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://pubs.acs.org/doi/10.1021/acs.jpca.7b11586
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01 Feb 2018 08:58
Last Modified:
19 Sep 2023 01:51