Regensburg 2013 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 58: Poster Session III (Solid-liquid interfaces; Scanning probe and other methods; Electronic structure theory; Spin-orbit interaction)

O 58.27: Poster

Mittwoch, 13. März 2013, 18:15–21:45, Poster B1

Adsorption of organic layers on the giant spin orbit split BiAg₂ surface alloy — •Maren C. Cottin¹, Johannes Schaffert¹, Jorge Lobo-Checa², J. Enrique Ortega^2,3,4, Andrew L. Walter⁴, Christian A. Bobisch¹, and Rolf Möller¹ — ¹Faculty of Physics, Center for Nanointegration Duisburg-Essen, University of Duisburg-Essen, 47048 Duisburg, Germany — ²Centro de Física de Materiales CSIC/UPV-EHU-Materials Physics Center, Manuel Lardizábal 5, E-20018 San Sebastián, Spain — ³Departamento Física Aplicada I, Universidad del País Vasco, E-20018 Donostia-San Sebastián, Spain — ⁴Donostia International Physics Center, Manuel Lardizábal 4, E-20018 San Sebastián, Spain

The emerging field of spintronic devices has recently triggered a lot of research effort on materials exhibiting a spin-splitting of their electronic states. Recently, surface alloys such as PbAg₂, BiCu₂ or BiAg₂ have gathered a lot of attention due to the giant spin orbit splitting of their surface states. At the same time organic molecules have already become important electronic building blocks of modern electronic devices.

To study the effect of the adsorption of organic layers on such giant spin split surface states, scanning tunneling microscopy (STM) experiments have been performed, e.g. on the archetype organic molecule 3,4,9,10 - perylene tetracarboxylic dianhydride acid (PTCDA) adsorbed on BiAg₂. The STM images show ordered layers exhibiting different molecular superstructures.