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A quantum pump in buckled graphene ribbon with armchair edges is discussednumerically. By solving the Su-Schrieffer-Heeger model and performing thecomputer simulation of quantum transport we find that a kink adiabaticallymoving along the metallic ribbon results in highly-efficient pumping, with acharge per kink transition close to the maximal value determined by the Fermivelocity in graphene. Remarkably, insulating nanoribbon show the quantizedvalue of a charge per kink ($2e$) in relatively wide range of the systemparameters, providing a candidate for the quantum standard ampere. We attributeit to the presence of a localized electronic state, moving together with akink, whose energy lies within the ribbon energy gap.

Adiabatic pumping driven by moving kink and quantum standard ampere in buckled graphene nanoribbon