Spin selectivity in angle-resolved Auger photoelectron coincidence spectroscopy (AR-APECS) is used to probe electron correlation in ferromagnetic thin films. In particular, exploiting the AR-APECS capability to discriminate Auger electron emission events characterized by valence hole pairs created either in the high or in the low total spin state, a strong correlation effect in the Fe M2,3VV Auger line shape (measured in coincidence with the Fe 3p photoelectrons) of Fe/Cu(001) thin films is detected and ascribed to interactions within the majority spin subband. Such an assignment follows from a close comparison of the experimental AR-APECS line shapes with the predictions of a model based on spin polarized density functional theory and the Cini-Sawatzky approach.

Spin-dependent on-site electron correlations and localization in itinerant ferromagnets / R. Gotter, G. Fratesi, R.A. Bartynski, F. Da Pieve, F. Offi, A. Ruocco, S. Ugenti, M.I. Trioni, G.P. Brivio, G. Stefani. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 109:12(2012 Sep 17), pp. 126401.1-126401.5. [10.1103/PhysRevLett.109.126401]

Spin-dependent on-site electron correlations and localization in itinerant ferromagnets

G. Fratesi
Secondo
;
M.I. Trioni;
2012-09-17

Abstract

Spin selectivity in angle-resolved Auger photoelectron coincidence spectroscopy (AR-APECS) is used to probe electron correlation in ferromagnetic thin films. In particular, exploiting the AR-APECS capability to discriminate Auger electron emission events characterized by valence hole pairs created either in the high or in the low total spin state, a strong correlation effect in the Fe M2,3VV Auger line shape (measured in coincidence with the Fe 3p photoelectrons) of Fe/Cu(001) thin films is detected and ascribed to interactions within the majority spin subband. Such an assignment follows from a close comparison of the experimental AR-APECS line shapes with the predictions of a model based on spin polarized density functional theory and the Cini-Sawatzky approach.
Settore FIS/03 - Fisica della Materia
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/232031
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