Experimental Observation of Quantum Hall Effect and Berry's Phase in Graphene

Authors: Yuanbo Zhang, Yan-Wen Tan, Horst L. Stormer, Philip Kim

A link to the paper is here

Two-Dimensional Gas of Massless Dirac Fermions in Graphene

Authors: K.S. Novoselov, A.K. Geim, S.V. Morozov, D. Jiang, M.I. Katsnelson, I.V. Grigorieva, S.V. Dubonos, A.A. Firsov

A link to the paper is here