The theoretical investigation of the image states in front of an ultrathin iron film grown on copper has been performed by means of the embedding method and a recently developed procedure for the inclusion of the image potential tail in a first principle calculation. From the electronic response to an applied electric field, the image plane position has been evaluated. This also allows one to obtain useful information about the spin dependent screening properties of the system. Exchange splitting, effective mass, and lifetime of such surface states result in good agreement with recently performed two-photon photoemission experiments [see A.B. Schmidt, M. Pickel, M. Wiemhofer, M. Donath, M. Weinelt, Phys. Rev. Lett. 95 (2005) 107402].

Ultrathin Fe film on Cu(001): Exchange splitting of image states from first principles / S. Achilli, S. Caravati, M.I. Trioni. - In: SURFACE SCIENCE. - ISSN 0039-6028. - 601:18(2007), pp. 4048-4052. ((Intervento presentato al 24. convegno European Conference on Surface Science (ECOSS-24) tenutosi a Paris nel 2006.

Ultrathin Fe film on Cu(001): Exchange splitting of image states from first principles

S. Achilli;M.I. Trioni
2007

Abstract

The theoretical investigation of the image states in front of an ultrathin iron film grown on copper has been performed by means of the embedding method and a recently developed procedure for the inclusion of the image potential tail in a first principle calculation. From the electronic response to an applied electric field, the image plane position has been evaluated. This also allows one to obtain useful information about the spin dependent screening properties of the system. Exchange splitting, effective mass, and lifetime of such surface states result in good agreement with recently performed two-photon photoemission experiments [see A.B. Schmidt, M. Pickel, M. Wiemhofer, M. Donath, M. Weinelt, Phys. Rev. Lett. 95 (2005) 107402].
photoemission; excited states; metallic surfaces; density functional calculations; Green's function methods
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/2434/722093
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