Scanning Tunneling Spectroscopy of Graphene on Graphite

Abstract

We report low temperature high magnetic field scanning tunneling microscopy and spectroscopy of graphene flakes on graphite that exhibit the structural and electronic properties of graphene decoupled from the substrate. Pronounced peaks in the tunneling spectra develop with field revealing a Landau level sequence that provides a direct way to identify graphene and to determine the degree of its coupling to the substrate. The Fermi velocity and quasiparticle lifetime, obtained from the positions and width of the peaks, provide access to the electron-phonon and electron-electron interactions.

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Cited by in corpus (10)

• On the universal AC optical background in graphene
• How perfect can graphene be?
• Engineering artificial graphene in a two-dimensional electron gas
• Evidence for Strain-Induced Local Conductance Modulations in Single-Layer Graphene on SiO2
• Charge 2e skyrmions in bilayer graphene
• Local density of states and scanning tunneling currents in graphene
• The enigma of the nu=0 quantum Hall effect in graphene
• Gaps and tails in graphene and graphane
• Splitting of critical energies in the $n$=0 Landau level of graphene
• Boundary-induced violation of the Dirac fermion parity and its signatures in local and global tunneling spectra of graphene