Regensburg 2016 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
O: Fachverband Oberflächenphysik
O 16: Surface State Spectroscopy II
O 16.2: Vortrag
Montag, 7. März 2016, 15:15–15:30, H4
Interfaces of h-BN on Ag(111) and Ag/Cu(111) — •Martin Schwarz1, Manuela Garnica1, Daniele Stradi2, Johannes V. Barth1, and Willi Auwärter1 — 1Physik Department E20, Technische Universität München, James Franck Str. 1, 85748 Garching, Germany — 2Department of Micro- and Nanotechnology, Center for Nanostructured Graphene, Technical University of Denmark, Denmark
Silver has attracted increasing interest as a substrate for heteroepitaxial layers, since the growth of a silicene layer on its (111) face has been demonstrated [1]. We explored different synthesis methods of hexagonal boron nitride (h-BN) layers on silver substrates. Beside the direct growth of h-BN on Ag(111), Ag intercalation on the BN/Cu(111) system [2] was investigated. The quality of the resulting layers has been examined by high-resolution scanning tunneling microscopy while the electronic structure of the Ag surface upon 2D layer growth has been studied by scanning tunneling spectroscopy and first-principle calculations. We demonstrate that the adsorption of the 2D layer alters the surface potential and has an impact on the binding energy of the Shockley-state which shifts towards higher energies.
[1] Lalmi, B. et. al. Appl. Phys. Lett., 2010, 97, 223109
[2] Joshi, S. et. al. Nano Lett., 2012, 12, 5821-5828