Influence of the degree of decoupling of graphene on the properties of transition metal adatoms

Abstract

We investigate the adsorption sites of $3d$ transition metal (TM) adatoms by means of low-temperature scanning tunneling microscopy and spectroscopy. Co and Ni adatoms were adsorbed on two types of graphene on SiC(0001), i.e. pristine epitaxial monolayer graphene (MLG) and quasi-free-standing monolayer graphene (QFMLG). In the case of QFMLG, two stable adsorption sites are identified, while in the case of MLG, only one adsorption site is observed. Our experimental results reveal the decoupling efficiency as a crucial parameter for determining the adsorption site as well as the electronic properties of $3d$ transition metal atoms on graphene. Furthermore, we show that Co atoms adsorbed on QFMLG are strong scattering potentials for Dirac fermions and cause intervalley scattering in their vicinity.

10 pages, 4 figures

References in corpus (6)

• Electric Field Effect in Atomically Thin Carbon Films
• The electronic properties of graphene
• Detection of Individual Gas Molecules Absorbed on Graphene
• Electron states of mono- and bilayer graphene on SiC probed by STM
• Adatoms and clusters of 3d transition metals on graphene: Electronic and magnetic configurations
• Adsorption of cobalt on graphene: Electron correlation effects from a quantum chemical perspective

Cited by in corpus (14)

• The Stability, Energetics, and Magnetic States of Cobalt Adatoms on Graphene
• Competition between Kondo effect and RKKY physics in graphene magnetism
• Kondo effect in graphene with Rashba spin-orbit coupling
• Adsorption Sites of Individual Metal Atoms on Ultrathin MgO(100) Films
• Single 3$d$ transition metal atoms on multi-layer graphene systems: electronic configurations, bonding mechanisms and role of the substrate
• Emergence of Kondo resonance in graphene intercalated with cerium
• Catching the Bound States in the Continuum of a Phantom Atom in Graphene
• Long-range exchange interaction between magnetic impurities in graphene
• Indirect exchange interaction between magnetic adatoms in graphene
• Potential and spin-exchange interaction between Anderson impurities in graphene
• Sublattice symmetry breaking and Kondo-effect enhancement in strained graphene
• Efficient n-type Doping in Epitaxial Graphene through Strong Lateral Orbital Hybridization of Ti Adsorbate
• Effect of Inter-Adatoms Correlations on the Local Density of States of Graphene
• Fundamental properties of transition-metals-adsorbed graphene