Dependence of the adsorption height of graphenelike adsorbates on their dimensionality

S. Weiß, D. Gerbert, A. Stein, A. K. Schenk, X. Yang, C. Brülke, R. Kremring, S. Feldmann, F. C. Bocquet, M. Gille, S. Hecht, M. Sokolowski, P. Tegeder, S. Soubatch, and F. S. Tautz

Phys. Rev. B 98, 075410 – Published 10 August 2018

Abstract

Comparing the adsorption heights of various graphene nanoribbons on Cu(111) and Au(111) surfaces to those of graphene and $π$ -conjugated planar organic molecules, we observe that two-dimensional graphene adsorbs much further away from the surface than both one-dimensional graphene nanoribbons and $π$ -conjugated planar molecules—which represent zero-dimensional graphene flakes. We show that this is a direct consequence of the adsorbates' dimensionality. Our results provide invaluable insights into the interplay of Pauli repulsion, pushback effect, and chemical interaction for graphenelike adsorbates of any dimensionality on metal surfaces.

Received 21 December 2017

DOI:https://doi.org/10.1103/PhysRevB.98.075410

Physics Subject Headings (PhySH)

Adsorption Chemical bonding

1-dimensional systems Graphene Nanoribbon

Photoelectron techniques X-ray photoelectron spectroscopy X-ray standing waves

Condensed Matter, Materials & Applied Physics

Authors & Affiliations

S. Weiß^1,2, D. Gerbert³, A. Stein³, A. K. Schenk^4,*, X. Yang^1,2, C. Brülke⁵, R. Kremring⁵, S. Feldmann^3,†, F. C. Bocquet^1,2, M. Gille⁶, S. Hecht⁶, M. Sokolowski⁵, P. Tegeder³, S. Soubatch^1,2,‡, and F. S. Tautz^1,2

¹Peter Grünberg Institut (PGI-3), Forschungszentrum Jülich, 52425 Jülich, Germany
²Jülich Aachen Research Alliance (JARA), Fundamentals of Future Information Technology, 52425 Jülich, Germany
³Physikalisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 253, 69120 Heidelberg, Germany
⁴Department of Chemistry and Physics, La Trobe Institute for Molecular Sciences, La Trobe University, Victoria 3086, Australia
⁵Institut für Physikalische und Theoretische Chemie der Universität Bonn, Wegelerstraße 12, 53115 Bonn, Germany
⁶Department of Chemistry, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489 Berlin, Germany

^*Present address: Center for Quantum Spintronics, Department of Physics, Norwegian University of Science and Technology, NO-7491 Trondheim, Norway.
^†Present address: Cavendish Laboratory, University of Cambridge, J J Thomson Avenue, Cambridge CB3 0HE, United Kingdom.
^‡Corresponding author: s.subach@fz-juelich.de

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Issue

Vol. 98, Iss. 7 — 15 August 2018

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