title: Spiral growth and step edge barriers.
abstract: The growth of spiral mounds containing a screw dislocation is compared to the growth of wedding cakes by two-dimensional nucleation. Using phase field simulations and homoepitaxial growth experiments on the Pt(111) surface we show that both structures attain the same large scale shape when a significant step-edge barrier suppresses interlayer transport. The higher vertical growth rate of the spiral mounds on Pt(111) reflects the different incorporation mechanisms for atoms in the top region and can be formally represented by an enhanced apparent step-edge barrier.
authors.affiliation: II. Physikalisches Institut, Universität zu Köln, 50937 Köln, Zülpicher Strasse 77, Germany.
authors.forename: Alex
authors.initials: A
authors.lastname: Redinger
authors.forename: Oliver
authors.initials: O
authors.lastname: Ricken
authors.forename: Philipp
authors.initials: P
authors.lastname: Kuhn
authors.forename: Andreas
authors.initials: A
authors.lastname: Rätz
authors.forename: Axel
authors.initials: A
authors.lastname: Voigt
authors.forename: Joachim
authors.initials: J
authors.lastname: Krug
authors.forename: Thomas
authors.initials: T
authors.lastname: Michely