▎ 摘　　要

We calculate the phonon-drag thermopower S-g of an armchair graphene nanoribbon (AGNR) in the boundary scattering regime of phonons. S-g is studied as a function of temperature, Fermi energy and width of the AGNR. At very low temperatures T, S-g is exponentially suppressed and an activated behavior is observed which is characteristic of one-dimensional carriers. This is in contrast to the power law dependence in graphene in the Bloch-Gruneisen regime. However, at higher T, S-g in the AGNR levels off. S-g also shows strong dependence on Fermi energy and width of the AGNR. The magnitude of S-g in the AGNR is compared with that in single-wall carbon nanotube and graphene.