Nature Physics
The experimental observation of quantum Hall effect of l=3 chiral quasiparticles in trilayer graphene
Nature Physics · 7, 953-957 (2011)
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Introduction
Quantum oscillations and Hall plateaus in ABC-stacked trilayer graphene are measured alongside the density dependence of the cyclotron mass. Together these observations support chiral quasiparticles with cubic dispersion.
A closer reading
Stacking changes the character of the low-energy electronic states. The argument draws strength from the plateau sequence, the approximately 3π Berry phase and the rising mass near charge neutrality, rather than assigning a quasiparticle from one plateau alone.