title: Continuous tuning of electronic correlations by alkali adsorption on layered 1T-TaS2.
abstract: Angle-resolved photoemission spectroscopy shows that a Mott-Hubbard type metal-insulator transition occurs at the Rb adsorbed surface of the layered charge-density-wave compound 1T-TaS2. The transition is driven by adsorption induced modifications of the charge-density wave and of the interlayer coupling, leading to an increase of the on-site Coulomb correlation energy and a narrowing of the Ta 5d band perpendicular to the layers, respectively. The continuous rearrangement of spectral weight is measured live during the deposition process.
authors.affiliation: Institut für Experimentelle und Angewandte Physik, Universität Kiel, D-24098 Kiel, Germany. rossnagel@physik.uni-kiel.de
authors.forename: K
authors.initials: K
authors.lastname: Rossnagel
authors.forename: Eli
authors.initials: E
authors.lastname: Rotenberg
authors.forename: H
authors.initials: H
authors.lastname: Koh
authors.forename: N V
authors.initials: NV
authors.lastname: Smith
authors.forename: L
authors.initials: L
authors.lastname: Kipp