Understanding and engineering phonon-mediated tunneling into graphene on metal surfaces

Abstract

Metal-intercalated graphene on Ir(111) exhibits phonon signatures in inelastic elec- tron tunneling spectroscopy with strengths that depend on the intercalant. Extraor- dinarily strong graphene phonon signals are observed for Cs intercalation. Li interca- lation likewise induces clearly discriminable phonon signatures, albeit less pronounced than observed for Cs. The signal can be finely tuned by the alkali metal coverage and gradually disappears upon increasing the junction conductance from tunneling to con- tact ranges. In contrast to Cs and Li, for Ni-intercalated graphene the phonon signals stay below the detection limit in all transport ranges. Going beyond the conventional two-terminal approach, transport calculations provide a comprehensive understanding of the subtle interplay between the graphene{electrode coupling and the observation of graphene phonon spectroscopic signatures.

References in corpus (15)

• Kohn Anomalies and Electron-Phonon Interaction in Graphite
• Giant Phonon-induced Conductance in Scanning Tunneling Spectroscopy of Gate-tunable Graphene
• Scanning tunneling spectroscopy of inhomogeneous electronic structure in monolayer and bilayer graphene on SiC
• Spatially resolved spectroscopy of monolayer graphene on SiO2
• The mechanism of caesium intercalation of graphene
• Transport properties of graphene in the high-current limit
• Evolution of Microscopic Localization in Graphene in a Magnetic Field from Scattering Resonances to Quantum Dots
• Contribution of the buffer layer to the Raman spectrum of epitaxial graphene on SiC(0001)
• Phonon mediated tunneling into graphene
• An Artificially Lattice Mismatched Graphene/Metal Interface: Graphene/Ni/Ir(111)
• Efficient calculation of inelastic vibration signals in electron transport: Beyond the wide-band approximation
• Pseudomagnetic Fields in a Locally Strained Graphene Drumhead
• Screening of electron-phonon coupling in graphene on Ir(111)
• Unravelling the role of inelastic tunneling into pristine and defected graphene
• Simple and efficient LCAO basis sets for the diffuse states in carbon nanostructures

Cited by in corpus (7)

• First-principles calculations of charge carrier mobility and conductivity in bulk semiconductors and two-dimensional materials
• Electric-field control of a single-atom polar bond
• Electronic Characterization of a Charge-Transfer Complex Monolayer on Graphene
• Removing all periodic boundary conditions: Efficient non-equilibrium Green function calculations
• Observation of Giant Quantized Phonon Modes in Graphene via Tunneling Spectra
• Two-way twisting of a confined monolayer: orientational ordering within the van der Waals gap between graphene and its crystalline substrate
• Enhanced Phonon-Assisted Tunneling in Metal -- Twisted Bilayer Graphene Junctions