Point Defects on Graphene on Metals

M. M. Ugeda, D. Fernández-Torre, I. Brihuega, P. Pou, A. J. Martínez-Galera, Rubén Pérez, and J. M. Gómez-Rodríguez
Phys. Rev. Lett. 107, 116803 – Published 8 September 2011
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Abstract

Understanding the coupling of graphene with its local environment is critical to be able to integrate it in tomorrow’s electronic devices. Here we show how the presence of a metallic substrate affects the properties of an atomically tailored graphene layer. We have deliberately introduced single carbon vacancies on a graphene monolayer grown on a Pt(111) surface and investigated its impact in the electronic, structural, and magnetic properties of the graphene layer. Our low temperature scanning tunneling microscopy studies, complemented by density functional theory, show the existence of a broad electronic resonance above the Fermi energy associated with the vacancies. Vacancy sites become reactive leading to an increase of the coupling between the graphene layer and the metal substrate at these points; this gives rise to a rapid decay of the localized state and the quenching of the magnetic moment associated with carbon vacancies in freestanding graphene layers.

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  • Received 15 March 2011

DOI:https://doi.org/10.1103/PhysRevLett.107.116803

© 2011 American Physical Society

Authors & Affiliations

M. M. Ugeda1, D. Fernández-Torre2, I. Brihuega1,*, P. Pou2, A. J. Martínez-Galera1, Rubén Pérez2, and J. M. Gómez-Rodríguez1

  • 1Departamento de Física de la Materia Condensada, Universidad Autónoma de Madrid, E-28049 Madrid, Spain
  • 2Departamento de Física Teórica de la Materia Condensada, Universidad Autónoma de Madrid, E-28049 Madrid, Spain

  • *Corresponding author. ivan.brihuega@uam.es

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Issue

Vol. 107, Iss. 11 — 9 September 2011

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