Chiral Decomposition in the Electronic Structure of Graphene Multilayers

We show that the low-energy electronic structure of arbitrarily stacked graphene multilayers with nearest-neighbor interlayer tunneling consists of chiral pseudospin doublets. Although the number of doublets in an $N$-layer system depends on the stacking sequence, the pseudospin chirality sum is always $N$. $N$-layer stacks have $N$ distinct Landau levels at E=0 for each spin and valley, and quantized Hall conductivity ${\sigma }_{xy}=\pm (4e^2\mathrm{/}h)(N\mathrm{/}2+n)$ where $n$ is a non-negative integer.