Gate-Controlled Ionization and Screening of Cobalt Adatoms on a Graphene Surface

Abstract

We describe scanning tunneling spectroscopy (STS) measurements performed on individual cobalt (Co) atoms deposited onto backgated graphene devices. We find that Co adatoms on graphene can be ionized by either the application of a global backgate voltage or by the application of a local electric field from a scanning tunneling microscope (STM) tip. Large screening clouds are observed to form around Co adatoms ionized in this way, and we observe that some intrinsic graphene defects display a similar behavior. Our results provide new insight into charged impurity scattering in graphene, as well as the possibility of using graphene devices as chemical sensors.

19 pages, 4 figures

References in corpus (11)

• Electric Field Effect in Atomically Thin Carbon Films
• Quantum ESPRESSO: a modular and open-source software project for quantum simulations of materials
• Control of graphene's properties by reversible hydrogenation
• Charged Impurity Scattering in Graphene
• A self-consistent theory for graphene transport
• Disorder Induced Localized States in Graphene
• Giant Phonon-induced Conductance in Scanning Tunneling Spectroscopy of Gate-tunable Graphene
• Tuning the effective fine structure constant in graphene: opposing effects of dielectric screening on short- and long-range potential scattering
• The Coulomb impurity problem in graphene
• Localized Magnetic States in Graphene
• Atomic Collapse and Quasi-Rydberg States in Graphene

Cited by in corpus (90)

• Electronic modulation of infrared emissivity in graphene plasmonic resonators
• Colloquium: Graphene spectroscopy
• Adatoms and clusters of 3d transition metals on graphene: Electronic and magnetic configurations
• Transition metal ad-atoms on graphene: Influence of local Coulomb interactions on chemical bonding and magnetic moments
• Local spectroscopy of moiré-induced electronic structure in gate-tunable twisted bilayer graphene
• The Physics of Kondo Impurities in Graphene
• Mapping Dirac Quasiparticles near a Single Coulomb Impurity on Graphene
• Electrically Controlled Adsorption of Oxygen in Bilayer Graphene Devices
• Graphene on Hexagonal Boron Nitride
• Recent progresses of quantum confinement in graphene quantum dots
• Gating the charge state of a single molecule by local electric fields
• Adsorption of cobalt on graphene: Electron correlation effects from a quantum chemical perspective
• Strain Control of Magnetism in Transition-Metal-Atom Decorated Graphene
• Enhancement of the Kondo effect through Rashba spin-orbit interactions
• Tuning the van der Waals Interaction of Graphene with Molecules via Doping
• Imaging gate-tunable Tomonaga-Luttinger liquids in 1H-MoSe${}_2$ mirror twin boundaries
• Organometallic Complexes of Graphene and Carbon Nanotubes: Introducing New Perspectives in Atomtronics, Spintronics, High Mobility Graphene Electronics and Energy Conversion Catalysis
• The Stability, Energetics, and Magnetic States of Cobalt Adatoms on Graphene
• Realization of a hole-doped Mott insulator on a triangular silicon lattice
• Visualization and Control of Single Electron Charging in Bilayer Graphene Quantum Dots
• Influence of the degree of decoupling of graphene on the properties of transition metal adatoms
• Detecting giant electron-hole asymmetry in graphene monolayer generated by strain and charged-defect scattering via Landau level spectroscopy
• Vibronic response of a spin-1/2 state from a carbon impurity in two-dimensional WS${}_2$
• An orbitally derived single-atom magnetic memory
• Intrinsic disorder in graphene on transition metal dichalcogenide heterostructures
• The ${\omega }^3$ scaling of the vibrational density of states in quasi-2D nanoconfined solids
• Friedel oscillations at the surfaces of rhombohedral $N$-layer graphene
• Imaging atomic vacancies in commercially available black phosphorus
• Poor electronic screening in lightly doped Mott insulators observed with scanning tunneling microscopy
• Bound States in Nanoscale Graphene Quantum Dots in a Continuous Graphene Sheet
• Ab Initio Many-body Study of Cobalt Adatoms Adsorbed on Graphene
• Theoretical analysis of a dual-probe scanning tunneling microscope setup on graphene
• Graphene Nanogap for Gate Tunable Quantum Coherent Single Molecule Electronics
• Electric Field Control of Molecular Charge State in a Single-Component 2D Organic Nanoarray
• Electrons imitating light: Frustrated supercritical collapse in charged arrays on graphene
• Coulomb charging energy of vacancy-induced states in graphene
• Single 3$d$ transition metal atoms on multi-layer graphene systems: electronic configurations, bonding mechanisms and role of the substrate
• Spatial Charge Inhomogeneity and Defect States in Topological Dirac Semimetal Thin Films
• Spatially resolving density-dependent screening around a single charged atom in graphene
• Electrical control of intervalley scattering in graphene via the charge state of defects
• Chemical Bonding of Transition-metal Co${}_{13}$ Clusters with Graphene
• Scanning tunneling spectroscopy and Dirac point resonances due to a single Co adatom on gated graphene
• Quantum-Dot Assisted Spectroscopy of Degeneracy-Lifted Landau Levels in Graphene
• Emergence of Kondo resonance in graphene intercalated with cerium
• Voltage-controlled spin injection with an endohedral fullerene CoC${}_{60}$ dimer
• Kondo effect in monolayer and bilayer graphene: physical realizations of the multi-channel Kondo models
• Characterization and manipulation of intervalley scattering induced by an individual monovacancy in graphene
• Long-range exchange interaction between magnetic impurities in graphene
• Kondo effect of an adatom in graphene and its scanning tunneling spectroscopy
• Isotropic charge screening of the anisotropic black phosphorus revealed by potassium adatoms
• Orbital symmetry fingerprints for magnetic adatoms in graphene
• Fermi-edge transmission resonance in graphene driven by a single Coulomb impurity
• Gate-tunable magnetism of C adatoms on graphene
• First-principles multiscale modelling of charged adsorbates on doped graphene
• Native defects in ultra-high vacuum grown graphene islands on Cu(111)
• Indirect exchange interaction between magnetic adatoms in graphene
• Spectral footprints of impurity scattering in graphene nanoribbons
• Flat bands with fragile topology through superlattice engineering on single-layer graphene
• Enhancement of electron transport and bandgap opening in graphene induced by adsorbates
• Double Fe-impurity charge state in the topological insulator Bi${}_2$Se${}_3$
• Local moment formation in bilayer graphene
• Band structures and ${\mathbb{Z}}_2$ invariants of two-dimensional transition metal dichalcogenide monolayers from fully-relativistic Dirac-Kohn-Sham theory using Gaussian-type orbitals
• Defects, band bending and ionization rings in MoS2
• Electrical conductivity and resonant states of doped graphene considering next-nearest neighbor interaction
• Sublattice symmetry breaking and Kondo-effect enhancement in strained graphene
• Potential and spin-exchange interaction between Anderson impurities in graphene
• Critical quasiparticles in single-impurity and lattice Kondo models
• Spectral properties and the Kondo effect of cobalt adatoms on silicene
• Designing Quantum Spin-Orbital Liquids in Artificial Mott Insulators
• Magnetism of an adatom on biased AA-stacked bilayer graphene
• Quantum phase transitions into Kondo states in bilayer graphene
• The graphene sheet versus the 2DEG: a relativistic Fano spin-filter via STM and AFM tips
• Magnetic response of a two-dimensional viscous electron fluid
• Point defects and their dynamic behaviors in silver monolayer intercalated between graphene and SiC
• Ferromagnetic phase in graphene-based planar heterostructures induced by charged impurity
• Probing the Electronic Structure of Graphene Near and Far from the Fermi Level via Planar Tunneling Spectroscopy
• Two Anderson impurities in a 2D host with Rashba spin-orbit interaction
• Graphene: Junctions and STM Spectra
• Imaging local discharge cascades for correlated electrons in WS2/WSe2 moiré superlattices
• Inhomogeneous screening of gate electric field by interface states in graphene FETs
• Spectral properties of Co-decorated quasi 2-dimensional GaSe layer
• Defect-Induced Kondo Effect in graphene: Role of Localized State of $\pi$ Electrons
• Phase diagram of a pseudogap Anderson model with application to graphene
• Characterization and manipulation of individual defects in insulating hexagonal boron nitride using scanning tunneling microscopy
• Device Chemistry of Graphene Transistors
• Quantum Imaging of Single-Atom Spin-Splitting in a Monolayer Semiconductor
• Coverage-dependent magnetic and electronic properties of graphene with Co adatoms
• Orbitally resolved single-photon emission from an individual atomic vacancy center in a semiconductor
• Numerical package for QFT calculations of defect-induced phenomena in graphene
• Fundamental properties of transition-metals-adsorbed graphene