title: Scanning tunneling spectroscopy of Ag films: the effect of periodic versus quasiperiodic modulation.
abstract: By using scanning tunneling spectroscopy to probe a silver thin film that contains both periodic and quasiperiodic modulation, and by using Fourier analysis, we unravel the influences of individual Fourier components of the scattering potential (periodic versus quasiperiodic) on the electronic structure of a one-dimensional quasiperiodically modulated thin Ag film. Along the periodically modulated direction, a Bragg reflection-induced energy gap is observed in k space. On the other hand, the exotic E vs k spectrum with many minigaps was observed along the quasiperiodic direction.
authors.affiliation: Department of Physics, The University of Texas, Austin, Texas 78712, USA.
authors.forename: Daejin
authors.initials: D
authors.lastname: Eom
authors.forename: C-S
authors.initials: CS
authors.lastname: Jiang
authors.forename: H-B
authors.initials: HB
authors.lastname: Yu
authors.forename: J
authors.initials: J
authors.lastname: Shi
authors.forename: Q
authors.initials: Q
authors.lastname: Niu
authors.forename: Ph
authors.initials: P
authors.lastname: Ebert
authors.forename: C-K
authors.initials: CK
authors.lastname: Shih