Screening Charged Impurities and Lifting the Orbital Degeneracy in Graphene by Populating Landau Levels Graphene Times, 04 Nov 2013 Authors: Adina Luican-Mayer, Maxim Kharitonov, Guohong Li, 1 ChihPin Lu, Ivan Skachko, Alem-Mar B. Goncalves, K. Watanabe, T.