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

Research output: Contribution to journalJournal article

  • M. Pisarra
  • Ramon Bernardo Gavito
  • Juan Jesús Navarro
  • Andrés Black
  • Cristina Diaz
  • Fabián Calleja
  • Daniel Granados
  • Rodolfo Miranda
  • Fernando Martin
  • Amadeo L. Vázquez De Parga
<mark>Journal publication date</mark>03/2018
<mark>Journal</mark>Applied Surface Science
Number of pages6
Pages (from-to)300-305
Early online date10/10/17
<mark>Original language</mark>English


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.

Bibliographic note

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