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)=+/-(4e(2)/h)(N/2+n), where n is a non-negative integer.