title: Band structure and Fermi surface of electron-doped C60 monolayers.
abstract: C60 fullerides are challenging systems because both the electron-phonon and electron-electron interactions are large on the energy scale of the expected narrow band width. We report angle-resolved photoemission data on the band dispersion for an alkali-doped C60 monolayer and a detailed comparison with theory. Compared to the maximum bare theoretical band width of 170 meV, the observed 100-meV dispersion is within the range of renormalization by electron-phonon coupling. This dispersion is only a fraction of the integrated peak width, revealing the importance of many-body effects. Additionally, measurements on the Fermi surface indicate the robustness of the Luttinger theorem even for materials with strong interactions.
authors.affiliation: Advanced Light Source (ALS), Materials Science Division, Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA 94720, USA.
authors.forename: W L
authors.initials: WL
authors.lastname: Yang
authors.forename: V
authors.initials: V
authors.lastname: Brouet
authors.forename: X J
authors.initials: XJ
authors.lastname: Zhou
authors.forename: Hyoung J
authors.initials: HJ
authors.lastname: Choi
authors.forename: Steven G
authors.initials: SG
authors.lastname: Louie
authors.forename: Marvin L
authors.initials: ML
authors.lastname: Cohen
authors.forename: S A
authors.initials: SA
authors.lastname: Kellar
authors.forename: P V
authors.initials: PV
authors.lastname: Bogdanov
authors.forename: A
authors.initials: A
authors.lastname: Lanzara
authors.forename: A
authors.initials: A
authors.lastname: Goldoni
authors.forename: F
authors.initials: F
authors.lastname: Parmigiani
authors.forename: Z
authors.initials: Z
authors.lastname: Hussain
authors.forename: Z-X
authors.initials: ZX
authors.lastname: Shen