title: Probing quasiparticle states bound by disparate periodic potentials.
abstract: Thin films of Ag(111) with two-dimensional crystallinity of large lateral coherence grow on Ge(111), free of in-plane registry with the underlying substrate. Ag s-p electrons forming two-dimensional quantum well states scatter coherently at the buried interface potential, resulting in an unexpected set of new quasiparticle states, as observed by angle-resolved photoemission. These new features originate from interactions among Ag quantum well bands, gaining a momentum equivalent to a reciprocal vector of the substrate lattice.
authors.affiliation: Istituto di Struttura della Materia, Consiglio Nazionale delle Ricerche, Trieste, Italy.
authors.forename: P
authors.initials: P
authors.lastname: Moras
authors.forename: L
authors.initials: L
authors.lastname: Ferrari
authors.forename: C
authors.initials: C
authors.lastname: Spezzani
authors.forename: S
authors.initials: S
authors.lastname: Gardonio
authors.forename: M
authors.initials: M
authors.lastname: Lezaić
authors.forename: Ph
authors.initials: P
authors.lastname: Mavropoulos
authors.forename: S
authors.initials: S
authors.lastname: Blügel
authors.forename: C
authors.initials: C
authors.lastname: Carbone