nl6b01041_si_001.pdf (2.12 MB)
Rhombohedral Multilayer Graphene: A Magneto-Raman Scattering Study
journal contribution
posted on 2016-05-10, 00:00 authored by Younes Henni, Hector
Pablo Ojeda Collado, Karol Nogajewski, Maciej R. Molas, Gonzalo Usaj, Carlos A. Balseiro, Milan Orlita, Marek Potemski, Clement FaugerasGraphene
layers are known to stack in two stable configurations, namely, ABA
or ABC stacking, with drastically distinct electronic properties.
Unlike the ABA stacking, little has been done to experimentally investigate
the electronic properties of ABC graphene multilayers. Here, we report
on the first magneto optical study of a large ABC domain in a graphene
multilayer flake, with ABC sequences exceeding 17 graphene sheets.
ABC-stacked multilayers can be fingerprinted with a characteristic
electronic Raman scattering response, which persists even at room
temperatures. Tracing the magnetic field evolution of the inter Landau
level excitations from this domain gives strong evidence for the existence
of a dispersionless electronic band near the Fermi level, characteristic
of such stacking. Our findings present a simple yet powerful approach
to probe ABC stacking in graphene multilayer flakes, where this highly
degenerated band appears as an appealing candidate to host strongly
correlated states.