Spin and orbital configuration of Metal Phthalocyanine chains assembled on the Au(110) surface
Articolo
Data di Pubblicazione:
2013
Citazione:
Spin and orbital configuration of Metal Phthalocyanine chains assembled on the Au(110) surface / P. Gargiani, G. Rossi, R. Biagi, V. Corradini, M. Pedio, S. Fortuna, A. Calzolari, S. Fabris, J. Criginski Cezar, N. Brookes, M.G. Betti. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - 87:16(2013), pp. 165407.1-165407.11. [10.1103/PhysRevB.87.165407]
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 L 2,3 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.
Tipologia IRIS:
01 - Articolo su periodico
Elenco autori:
P. Gargiani, G. Rossi, R. Biagi, V. Corradini, M. Pedio, S. Fortuna, A. Calzolari, S. Fabris, J. Criginski Cezar, N. Brookes, M.G. Betti
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