Fig. 4
From: Observing a scale anomaly and a universal quantum phase transition in graphene
Experimental and theoretical picture in the overcritical regime. Upper plot: Theoretical behavior of the low energy and scale-free part of the overcritical (β = 1.33) quasi-bound states spectrum obtained from (6). The blue (purple) line corresponds to m = −1 (m = 0). Lower plot: Experimental values of the (STM) tunnelling conductance measured at the position of charged vacancies in graphene. The labelling E 1, E 2, \(E_1^\prime \) of the peaks is explained in the text
