Figure 4: Simulation results of the dependence on layer number.

(a) The structurally relaxed configuration for different multi-layer graphene (layer number, n=2–6 from left to right) in the presence of the same strain strength. (b) The strain-induced lattice variation Δd between the nearest two layers as a function of the layer number n. (c) The dependence of the piezoconductive factor γ on layer number n, with experimental data represented by red squares and simulation results represented by blue squares. The error bars of experimental data originate from the fitting process, while the error bars of simulating results originate from different disorder configurations in the numerical calculations.