Figure 4

(a) Δ X ₁ versus applied voltages of graphene film and the dashed reference line is Δ X = Δ x _zp . (b) Time dependences of ΔX ₁ and ΔX ₂, which are expressed in units of Δx _zp, where time is in units of t _ct, θ = 0, and the dashed reference line is ΔX = Δx _zp. L = 1.1 μm, W = 0.2 μm, d = 0.1 μm, T = 5 K, Q = 14000, and V = 2.5V.