Dresden 2017 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 46: Electronic Structure of Surfaces: Spectroscopy, Surface States

O 46.19: Poster

Dienstag, 21. März 2017, 18:30–20:30, P1A

Polarization-dependent ARPES investigation for organic molecules on Ag(110) and Cu(110) — •Xiaosheng Yang1, Daniel Lüftner2, Georg Koller2, Peter Puschnig2, Michael Ramsey2, Matteo Jugovac3, Giovanni Zamborlini3, Vitaliy Feyer3, Serguei Soubatch1, and Stefan Tautz11Peter Grünberg Institut (PGI-3), Forschungszentrum Jülich, 52425 Jülich, Germany — 2Institut für Physik, Karl-Franzens-Universität Graz, 8010 Graz, Austria — 3Elettra-Sincrotrone Trieste, 34149 Basovizza, Trieste, Italy

The angle-resolved photoemission spectroscopy (ARPES) is often used to study electronic properties of molecule/metal interfaces. In particular, for planar π-conjugated molecules, utilizing a plane wave approximation for the photoelectron final states, it is possible to completely reconstruct the spatial distribution of the molecular orbitals [1,2]. However, recently it has been shown that the plane wave approximation fails to describe correctly the angular distribution of photoemission induced by the s-polarized light [3] and a better final states approximation is needed to predict experimentally observed photoemission patterns. In this contribution, we revisit this issue and report on ARPES measurements of monolayers of several molecules - tetracene, pentacene, pentaphenyl and sexiphenyl - on Ag(110) and Cu(110) surfaces, performed using various polarizations of the incident light.

[1] P. Puschnig et al. Science 326, 702 (2009)

[2] S. Weiß et al. Nature Comm. 6, 8287 (2015)

[3] M. Dauth et al. Phys. Rev. Lett. 117, 183001 (2016)

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