title: Formation of a stable decagonal quasicrystalline Al-Pd-Mn surface layer.
abstract: We report the in situ formation of an ordered equilibrium decagonal Al-Pd-Mn quasicrystal overlayer on the fivefold symmetric surface of an icosahedral Al-Pd-Mn monograin. The decagonal structure of the epilayer is evidenced by x-ray photoelectron diffraction, low-energy electron diffraction, and electron backscatter diffraction. This overlayer is also characterized by a reduced density of states near the Fermi edge as expected for quasicrystals. This is the first time that a millimeter-size surface of the stable decagonal Al-Pd-Mn is obtained, studied, and compared to its icosahedral counterpart.
authors.affiliation: Institut de Physique, Université de Fribourg, Pérolles, CH-1700 Fribourg, Switzerland.
authors.forename: D
authors.initials: D
authors.lastname: Naumović
authors.forename: P
authors.initials: P
authors.lastname: Aebi
authors.forename: L
authors.initials: L
authors.lastname: Schlapbach
authors.forename: C
authors.initials: C
authors.lastname: Beeli
authors.forename: K
authors.initials: K
authors.lastname: Kunze
authors.forename: T A
authors.initials: TA
authors.lastname: Lograsso
authors.forename: D W
authors.initials: DW
authors.lastname: Delaney