▎ 摘　　要

We theoretically investigate the ellipticity dependence of high-order harmonic generation in graphene driven by the midinfrared laser field. The ellipticity dependence of the harmonic yield in the experiment [N. Yoshikawa, T. Tamaya, and K. Tanaka, Science 356, 736 (2017)] is reproduced perfectly by solving the semiconductor Bloch equations in the Houston basis under the tight-binding approximation. Based on the semiclassical recollision model, it is found that the recollision distance of the electron-hole pair excited from the zone 0.5 omega(0)