title: Optically induced effective mass renormalization: the case of graphite image potential states.
abstract: Many-body interactions with the underlying bulk electrons determine the properties of confined electronic states at the surface of a metal. Using momentum resolved nonlinear photoelectron spectroscopy we show that one can tailor these many-body interactions in graphite, leading to a strong renormalization of the dispersion and linewidth of the image potential state. These observations are interpreted in terms of a basic self-energy model, and may be considered as exemplary for optically induced many-body interactions.
authors.affiliation: Dipartimento di Matematica e Fisica, Università Cattolica del Sacro Cuore, Brescia I-25121, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Montagnese
authors.affiliation: Dipartimento di Matematica e Fisica, Università Cattolica del Sacro Cuore, Brescia I-25121, Italy.|i-LAMP (Interdisciplinary Laboratory for Advanced Materials Physics) Università Cattolica del Sacro Cuore, Brescia I-25121, Italy.
authors.forename: S
authors.initials: S
authors.lastname: Pagliara
authors.affiliation: Dipartimento di Matematica e Fisica, Università Cattolica del Sacro Cuore, Brescia I-25121, Italy.|i-LAMP (Interdisciplinary Laboratory for Advanced Materials Physics) Università Cattolica del Sacro Cuore, Brescia I-25121, Italy.
authors.forename: G
authors.initials: G
authors.lastname: Galimberti
authors.affiliation: Dipartimento di Fisica, Università degli Studi di Pavia, Pavia I-27100, Italy.
authors.forename: S
authors.initials: S
authors.lastname: Dal Conte
authors.affiliation: Dipartimento di Matematica e Fisica, Università Cattolica del Sacro Cuore, Brescia I-25121, Italy.|i-LAMP (Interdisciplinary Laboratory for Advanced Materials Physics) Università Cattolica del Sacro Cuore, Brescia I-25121, Italy.
authors.forename: G
authors.initials: G
authors.lastname: Ferrini
authors.affiliation: II. Physikalishes Institut der Universität zu Köln, Köln D-50937, Germany.
authors.forename: P H M
authors.initials: PH
authors.lastname: van Loosdrecht
authors.affiliation: II. Physikalishes Institut der Universität zu Köln, Köln D-50937, Germany.|Dipartimento di Fisica, Università degli Studi di Trieste, Trieste I-34127, Italy.|Sinctrotrone Trieste S.C.p.A, Basovizza I-34012, Italy.
authors.forename: F
authors.initials: F
authors.lastname: Parmigiani