title: Spin-dependent electron scattering at graphene edges on Ni(111).
abstract: We investigate the scattering of surface electrons by the edges of graphene islands grown on Ni(111). By combining local tunneling spectroscopy and ab initio electronic structure calculations we find that the hybridization between graphene and Ni states results in strongly reflecting graphene edges. Quantum interference patterns formed around the islands reveal a spin-dependent scattering of the Shockley bands of Ni, which we attribute to their distinct coupling to bulk states. Moreover, we find a strong dependence of the scattering amplitude on the atomic structure of the edges, depending on the orbital character and energy of the surface states.
authors.affiliation: Donostia International Physics Center (DIPC), Paseo Manuel de Lardizabal 4, E-20018 San Sebastián, Spain and IKERBASQUE, Basque Foundation for Science, E-48011 Bilbao, Spain.
authors.forename: A
authors.initials: A
authors.lastname: Garcia-Lekue
authors.affiliation: Catalan Institute of Nanoscience and Nanotecnology (ICN2), UAB Campus, E-08193 Bellaterra, Spain.
authors.forename: T
authors.initials: T
authors.lastname: Balashov
authors.affiliation: Catalan Institute of Nanoscience and Nanotecnology (ICN2), UAB Campus, E-08193 Bellaterra, Spain.
authors.forename: M
authors.initials: M
authors.lastname: Olle
authors.affiliation: Catalan Institute of Nanoscience and Nanotecnology (ICN2), UAB Campus, E-08193 Bellaterra, Spain.
authors.forename: G
authors.initials: G
authors.lastname: Ceballos
authors.affiliation: Donostia International Physics Center (DIPC), Paseo Manuel de Lardizabal 4, E-20018 San Sebastián, Spain and Centro de Física de Materiales CFM - MPC, Centro Mixto CSIC-UPV, Paseo Manuel de Lardizabal 5, E-20018, San Sebastián, Spain and Dpto. de Física de Materiales UPV/EHU, Facultad de Quimica, Paseo Manuel de Lardizabal 3, E-20018, San Sebastián, Spain.
authors.forename: A
authors.initials: A
authors.lastname: Arnau
authors.affiliation: Catalan Institute of Nanoscience and Nanotecnology (ICN2), UAB Campus, E-08193 Bellaterra, Spain and Instituciò Catalana de Recerca i Estudis Avancats (ICREA), E-08193 Barcelona, Spain and Department of Materials, ETH Zurich, Hönggerbergring 64, CH-8093 Zurich, Switzerland.
authors.forename: P
authors.initials: P
authors.lastname: Gambardella
authors.affiliation: Donostia International Physics Center (DIPC), Paseo Manuel de Lardizabal 4, E-20018 San Sebastián, Spain and Centro de Física de Materiales CFM - MPC, Centro Mixto CSIC-UPV, Paseo Manuel de Lardizabal 5, E-20018, San Sebastián, Spain.
authors.forename: D
authors.initials: D
authors.lastname: Sanchez-Portal
authors.affiliation: Catalan Institute of Nanoscience and Nanotecnology (ICN2), UAB Campus, E-08193 Bellaterra, Spain.
authors.forename: A
authors.initials: A
authors.lastname: Mugarza