Pierluigi Gargiani (Author), Giorgio Rossi (Author), Roberto Biagi (Author), Valdis Corradini (Author), Maddalena Pedio (Author), Sara Fortuna (Author), Arrigo Calzolari (Author), Stefano Fabris (Author), Julio Criginski Cezar (Author), N. B. Brookes (Author), Maria Grazia Betti (Author)

Abstract

The spin and orbital configuration of magnetic metal phthalocyanines (MPcs) deposited on metallic substrates are strongly influenced by the rehybridization of the molecular states with the underlying metal. FePc, CoPc, and CuPc isolated molecules are archetypal systems to investigate the interrelationship between magnetic moments and orbital symmetry after deposition on a metallic substrate. MPcs form long-range ordered chains self-assembled along the reconstructed channels of the Au(110) surface. X-ray magnetic circular dichroism from the L2,3 absorption edges of Fe, Co, and Cu shows that the orbital and spin configuration are strongly modified upon adsorption on the Au(110) surface if the orbitals responsible of the magnetic moment are involved in the interaction process. The magnetic moment for a single layer of molecular chains is completely quenched for the CoPc molecules, fully preserved for the CuPc and reduced for the FePc ones. The modified magnetic configuration is confined to the very interface layer, i.e., to the MPc molecules bound to the metal substrate up to the compact packing of the single layer. The different response can be rationalized in terms of the symmetry/orientation of the metal-ion d states interacting with the substrate states, as indicated by density functional theory calculations in agreement with experimental findings.

Keywords

phthalocyanine;Au(110);gold;self-assembly;patterns;configuration;density functional theory;CuPc;FePc;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UNG - University of Nova Gorica
UDC: 54
COBISS: 4540923 Link will open in a new window
ISSN: 1098-0121
Views: 4002
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Other data

URN: URN:SI:UNG
Type (COBISS): Not categorized
Pages: str. 165407-1-165407-11
Volume: ǂVol. ǂ87
Issue: ǂno. ǂ16
Chronology: 2013
DOI: 10.1103/PhysRevB.87.165407
ID: 9175964