We report a systematic investigation of the electronic properties and correlation effects in a two-dimensional magnetic surface alloy Mn/Cu(110) using a combination of spectroscopic techniques ranging from the angle-resolved photoemission, x-ray photoelectron, and x-ray absorption spectroscopy. Our results show that increasing Mn concentration surprisingly induces a progressive charge redistribution on the Cu(110) substrate, increasing the electron occupancy of the Cu Shockley surface state. Furthermore, new Mn-induced surface bands are identified at the X̄ symmetry point that are backfolded with respect to the Brillouin-zone boundary and expose a band gap in the occupied states. Distinct satellite features in both the core-level photoemission and absorption spectra for a wide range of Mn concentrations suggest the presence of strong electronic correlations and increased ordering of this alloy with respect to its other known counterparts, such as Mn/Cu(100) and Mn/Ni(110).

Electronic structure of the two-dimensionally ordered Mn/Cu(110) magnetic surface alloy / U. Manju, D. Topwal, G. Rossi, I. Vobornik. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - 82:3(2010), pp. 035442.1-035442.6. [10.1103/PhysRevB.82.035442]

Electronic structure of the two-dimensionally ordered Mn/Cu(110) magnetic surface alloy

Rossi, G.;
2010

Abstract

We report a systematic investigation of the electronic properties and correlation effects in a two-dimensional magnetic surface alloy Mn/Cu(110) using a combination of spectroscopic techniques ranging from the angle-resolved photoemission, x-ray photoelectron, and x-ray absorption spectroscopy. Our results show that increasing Mn concentration surprisingly induces a progressive charge redistribution on the Cu(110) substrate, increasing the electron occupancy of the Cu Shockley surface state. Furthermore, new Mn-induced surface bands are identified at the X̄ symmetry point that are backfolded with respect to the Brillouin-zone boundary and expose a band gap in the occupied states. Distinct satellite features in both the core-level photoemission and absorption spectra for a wide range of Mn concentrations suggest the presence of strong electronic correlations and increased ordering of this alloy with respect to its other known counterparts, such as Mn/Cu(100) and Mn/Ni(110).
Electronic, Optical and Magnetic Materials; Condensed Matter Physics
Settore FIS/03 - Fisica della Materia
PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/554909
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