Graphene electrical mobility

Fig. 38 Dependence of carrier mobility on electric field in graphene FETs. (Reprinted with permission from [185])...

Various tools, like the techniques described in this chapter, make use of macro properties to simulate the effective properties of composite structures. At some scales, those tools will normally give sufficient accuracy to determine effective properties, thanks to the nature of the simulated property at that scale. As seen in the previous section, at the nano-scale, some properties might need the use of quantum mechanics to predict the properties of a composite material as some components show properties such as current transport that are better described by such theories (Lee, 2000 Shunin and Schwartz, 1997), for example, it is well known that graphene may develop a resistivity of 10 2 cm (derived from early experiments on electron mobility graphite), but its manufacturing process as well as impurities cause different macroscopic electrical properties. 

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