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Correlated Electrons Step by Step: Itinerant-to-Localized Transition of Fe Impurities in Free-Electron Metal Hosts

AuthorsCarbone, Carlo; Veronese, M.; Gardonio, S.; Grazioli, C.; Krull, C. ; Balashov, Timofey ; Mugarza, Aitor ; Gambardella, Pietro
Issue Date2010
PublisherAmerican Physical Society
CitationPhysical Review Letters 104(11): 117601 (2010)
AbstractHigh-resolution photoemission spectroscopy and ab initio calculations have been employed to analyze the onset and progression of d-sp hybridization in Fe impurities deposited on alkali metal films. The interplay between delocalization, mediated by the free-electron environment, and Coulomb interaction among d electrons gives rise to complex electronic configurations. The multiplet structure of a single Fe atom evolves and gradually dissolves into a quasiparticle peak near the Fermi level with increasing host electron density. The effective multiorbital impurity problem within the exact diagonalization scheme describes the whole range of hybridizations.
Description4 páginas, 5 figuras.-- PACS numbers: 79.60.-i, 71.10.Li, 73.20.Hb.-- et al.
Publisher version (URL)http://dx.doi.org/10.1103/PhysRevLett.104.117601
Appears in Collections:(CIN2) Artículos
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