Phonon-drag magnetoquantum oscillations in graphene.

A theory of low-temperature phonon-drag magnetothermopower [Formula: see text] is presented in graphene in a quantizing magnetic field. [Formula: see text] 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 [Formula: see text] is also investigated as a function of temperature. A large value of [Formula: see text] (∼few hundreds of μV K-1 ) is predicted. Numerical values of [Formula: see text] are compared with the measured magnetothermopower S xx and the diffusion component [Formula: see text] from the modified Girvin-Jonson theory.