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O: Fachverband Oberflächenphysik

O 37: Posters: Plasmonics, Electronic Structure and Spin-Orbit Interaction, Semiconductor and Insulator Surfaces, Nanostructures

O 37.60: Poster

Dienstag, 1. April 2014, 18:30–22:00, P2

Growth study of nickel nanoislands on Ir(111) — •Stefan Wilfert, Lydia El-Kareh, and Matthias Bode — Physikalisches Institut, Experimentelle Physik II, Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany

We have investigated the growth of Ni nanoislands on Ir(111) by means of low-temperature scanning tunneling microscopy (STM) and spectroscopy (STS). Both, iridium and nickel, exhibit a fcc crystal structure in the bulk with a lattice mismatch of about 8%. Ni deposition at room temperature initially leads to equally spread islands with a diameter of about 10 nm. The early onset of 3D islands nucleation is observed. After a post-annealing process we observe coalescence into larger hexagonally shaped islands up to 40 nm in diameter while maintaining the 3D island character.