Fig. 4
From: Unusual electronic excitations in ABA trilayer graphene
The energy loss functions at \({q=0.005}\) \({1/\AA }\) and \({\phi \,=0^\circ }\) under the distinct doping levels: (a) \({E_F=0}\), (b) \({0.2}\,{\hbox {eV}}\), (c) \({0.4}\,{\hbox {eV}}\) and (d) \({0.6}\,{\hbox {eV}}\). For a \({E_F=0.2}\) system, they change with (e) \({q=0.005}\) \({1/\AA }\) and \({\phi \,=30^0}\), and (f) \({q=0.02}\) \({1/\AA }\) and \({\phi \,=0^0}\)
