Magneto-optics of bilayer inclusions in multilayered epitaxial graphene on the carbon face of SiC

Abstract

Additional component in multi-layer epitaxial graphene grown on the C-terminated surface of SiC, which exhibits the characteristic electronic properties of a AB-stacked graphene bilayer, is identified in magneto-optical response of this material. We show that these inclusions represent a well-defined platform for accurate magneto-spectroscopy of unperturbed graphene bilayers.

Decoupling and ordering of multilayer graphene on C-face 3C-SiC(111)

“…13,14 Note that ABstacked inclusions, showing sub-linear dependence of the LL transition energy on the magnetic field, are commonly reported for C-face graphene on 4H-and 6H-SiC. 15,22 In contrast, no contribution from AB-stacked defects could be observed in our C-face graphene on 3C-SiC.…”

Electronic Transport and Optical Properties of Graphene

“…[60][61][62] Moreover, similar results may also be found in AB-stacked graphite. [62] However, experimental measurements on optical properties under a nonuniform or composite fields are not available so far.…”

Infrared magneto-spectroscopy of two-dimensional and three-dimensional massless fermions: A comparison

“…[35][36][37] In MEG spectra at higher energies, a weak contribution from bilayer graphene inclusions appears. 33 similarities in the observed magneto-optical responses-in particular, the characteristic ffiffiffi B p dependence of all observed resonances. We also find a surprising similarity in the Fermi velocities of charge massless carriers in both materials.…”

“…Let us note that this LL spectrum (of so-called Kane fermions) differs from that of 3D Dirac or Weyl particles, for which the flat (f ¼ 0) band does not exist and the dependence, the low-energy/low-B response is dominated by absorption in highly doped graphene layers, a-few layer graphene stacks (e.g., bilayer graphene inclusions 33 ) and also bulk graphite inclusions. Interaction with the K point phonons in graphene are responsible for a small kink visible in the evolution of L -1(0) !…”