Berlin 2018 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 23: Focus Session: Molecular Nanostructures on surfaces - New Concepts towards Complex Architectures II
O 23.9: Vortrag
Dienstag, 13. März 2018, 12:45–13:00, MA 004
Band structure of a metal-molecule interface state revealed by feature recognition scanning tunneling spectroscopy — •Aizhan Sabitova1,2, Ruslan Temirov1,2, and F. Stefan Tautz1,2 — 1Peter Grünberg Institute (PGI-3), Forschungszentrum Jülich, Germany — 2JARA - Fundamentals of Future Information Technology
Adsorption of a monolayer of 3,4,9,10-perylenetetracarboxylic-dianhydride (PTCDA) on Ag(111) leads to emergence of an unoccupied free electron-like interface state [1]. Although the state is believed to be a hybrid of the Shockley surface state of Ag(111) and unoccupied molecular orbitals [1-4], the impact of the molecular overlayer has not been probed directly. Combining Fourier transform scanning tunneling spectroscopy with a new approach called feature recognition scanning tunneling spectroscopy (FR-STS) we map the dispersion of the PTCDA/Ag(111) interface state, resolve the gaps at the boundaries of its Brillouin zone, and image the corresponding standing wave band states. This information allows to reconstruct the scattering potential introduced by the molecular lattice.
[1] R. Temirov et al., Nature 444, 350-353 (2006)
[2] C.H. Schwalb et al., Phys. Rev. Lett. 101, 146801 (2008)
[3] M. Dyer and M. Persson, New. J. Phys. 12, 063014 (2010)
[4] N.L. Zaitsev et al., J. Exp. Theor. Phys. 110, 114-120 (2010)