▎ 摘　　要

A theory of low-temperature phonon-drag magnetothermopower S-xx(g) is presented in graphene in a quantizing magnetic field. S-xx(g) is found to exhibit quantum oscillations as a function of magnetic field B and electron concentration n(e). The amplitude of the oscillations is found to increase (decrease) with increasing B (n(e)). The behavior of S-xx(g) is also investigated as a function of temperature. A large value of S-xx(g) (similar to few hundreds of mu V K-1) is predicted. Numerical values of S-xx(g) are compared with the measured magnetothermopower S-xx and the diffusion component S-xx(d) from the modified Girvin-Jonson theory.