Cheianov and Fal'kov showed that the Friedel oscillations in graphene are strongly influenced by electrons' chirality and that the FO of charge density show a faster decay (∼ 1/r 3 ) instead of a 2D-typical decay of order 1/r 2 . In a non-relativistic 2D degenerate electron gas, it was shown by Lau et al. that the decay form of the Friedel oscillations will be