Pumping currents (blue line) and particle number (red line) by the SAW potential (9) in panel (a) the first band, (b) the second band, and (c) the third band, respectively. Note that the pumping current is reversed in the third band, which is related to the Chern number C₃ = −1. (d) Non-monotonous current plateaus versus the Fermi energy for V₁ = 10E_R. Upper panel (d1): V₃ = 10E_R. Lower panel (d2): V₃ = 20E_R.