Experimental Review of Graphene

Figure 27

Temperature dependence of resistivity and mobility in graphene on SiO₂. (a) Temperature-dependent resistivity of graphene on SiO₂ for different gate voltages, samples, and runs. Dashed lines are linear fits at low temperature. (b) Temperature-dependent mobility in graphene on SiO₂ for two samples at 𝑛=1×10¹² cm⁻². Mobility limits due to LA phonons (dark red solid line), substrate surface phonons (green dashed line), and impurities/defects (red and blue dashed lines) are presented. Matthiessen’s rule was used to obtain the net mobility for each sample (red and blue solid lines) [36].

(a)

(b)