Coverage-driven electronic decoupling of fe-phthalocyanine from a Ag(111) substrate

Journal Article (Journal Article)

Coverage-dependent structural and electronic properties of Fe-phthalocyanine (FePc) molecules adsorbed on Ag(111) have been investigated by scanning tunneling microscopy/spectroscopy and density functional calculations. While spectra of single FePc molecules are dominated by a broad signature of Fe d orbitals, spectra of molecules in an ordered superstructure resolve spectroscopic contributions from individual dz2 and d xz/dyz orbitals. Calculations suggest that an increased molecule-surface distance in the superstructure and a change of the Ag(111) surface electronic structure cause the spectral changes, which are consistent with a partial electronic decoupling of the molecules from the substrate. A progressive evolution toward a gap around the Fermi level is observed for molecules on the first and second molecular layer. © 2011 American Chemical Society.

Full Text

Duke Authors

Cited Authors

  • Gopakumar, TG; Brumme, T; Kröger, J; Toher, C; Cuniberti, G; Berndt, R

Published Date

  • June 23, 2011

Published In

Volume / Issue

  • 115 / 24

Start / End Page

  • 12173 - 12179

Electronic International Standard Serial Number (EISSN)

  • 1932-7455

International Standard Serial Number (ISSN)

  • 1932-7447

Digital Object Identifier (DOI)

  • 10.1021/jp2038619

Citation Source

  • Scopus