title: Probing the site-dependent Kondo response of nanostructured graphene with organic molecules.
abstract: TCNQ molecules are used as a sensitive probe for the Kondo response of the electron gas of a nanostructured graphene grown on Ru(0001) presenting a moiré pattern. All adsorbed molecules acquired an extra electron by charge transfer from the substrate, but only those adsorbed in the FCC-Top areas of the moiré show magnetic moment and Kondo resonance in the STS spectra. DFT calculations trace back this behavior to the existence of a surface resonance in the low areas of the graphene moiré, whose density distribution strongly depends on the stacking sequence of the moiré area and effectively quenches the magnetic moment for HCP-Top sites.
authors: Departamento Física de la Materia Condensada and IFIMAC, Universidad Autónoma de Madrid , Cantoblanco 28049, Madrid, Spain.
authors: Manuela
authors: M
authors: Garnica
authors: Daniele
authors: D
authors: Stradi
authors: Fabián
authors: F
authors: Calleja
authors: Sara
authors: S
authors: Barja
authors: Cristina
authors: C
authors: Díaz
authors: Manuel
authors: M
authors: Alcamí
authors: Andrés
authors: A
authors: Arnau
authors: Amadeo L
authors: AL
authors: Vázquez de Parga
authors: Fernando
authors: F
authors: Martín
authors: Rodolfo
authors: R
authors: Miranda
mesh_terms: D006108:Graphite / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry*; D009570:Nitriles / Q000737:chemistry*
chemical_list: D009570:Nitriles; C013703:tetracyanoquinodimethane; D006108:Graphite