Cobalt atoms drive the anchoring of Co-TPP molecules to the oxygen-passivated Fe(0 0 1) surface
Calloni, Alberto (Politecnico di Milano. Department of Physics)
Jagadeesh, Madan Sangarashettyhalli (Politecnico di Milano. Department of Physics)
Bussetti, Gianlorenzo (Politecnico di Milano. Department of Physics)
Fratesi, Guido (Università degli Studi di Milano. Dipartimento di Fisica)
Achilli, Simona (Institut Català de Nanociència i Nanotecnologia)
Picone, Andrea (Politecnico di Milano. Department of Physics)
Lodesani, Alessandro (Politecnico di Milano. Department of Physics)
Brambilla, Alberto (Politecnico di Milano. Department of Physics)
Goletti, Claudio (Università di Roma 'Tor Vergata'. Dipartimento di Fisica)
Ciccacci, Franco (Politecnico di Milano. Department of Physics)
Duò, Lamberto (Politecnico di Milano. Department of Physics)
Finazzi, Marco (Politecnico di Milano. Department of Physics)
Goldoni, Andrea (Elettra Sincrotrone Trieste)
Verdini, Alberto (Istituto Officina dei Materiali (Trieste, Itàlia))
Floreano, Luca (Istituto Officina dei Materiali (Trieste, Itàlia))

Date:	2020
Abstract:	We present a multitechnique investigation of the structural and electronic properties of the prototypical system composed by ultra-thin films of magnetic molecules [Co-tetraphenyl-porphyrins (Co-TPP)] grown on a ferromagnetic substrate [oxygen passivated Fe(0 0 1), namely the Fe(0 0 1)-p(1 × 1)O surface]. Low Energy electron diffraction (LEED) and scanning tunneling microscopy (STM), coupled with first-principles calculations, reveal the formation of a commensurate superstructure at monolayer coverage, made by a square array of flat-lying TPP molecules. UV-photoemission and inverse photoemission spectroscopies (UPS and IPES) are used to investigate their electronic structure. Similar to our previous results on the Zn-TPP growth on Fe(0 0 1)-p(1 × 1)O, the passivation of the metallic surface is able to preserve the photoemission features characteristic of quasi-free molecules, opening the route towards an exploitation of single oxide layers as protective films in organic/inorganic junctions. X-ray photoemission (XPS) and near edge X-ray adsorption fine structure spectroscopies (NEXAFS), are used to reveal the details of the Co-TPP interaction with the substrate.
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades.
Language:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Subject:	Co-TPP ; Fe(001)-p(1×1)O ; Ultra-thinmetal-oxideinterface ; Photoemission ; IPES ; NEXAFS
Published in:	Applied surface science, Vol. 505 (March 2020) , art. 144213, ISSN 0169-4332

DOI: 10.1016/j.apsusc.2019.144213

Postprint 30 p, 1.6 MB

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Catalan Institute of Nanoscience and Nanotechnology (ICN2)
Articles > Research articles
Articles > Published articles