Thermopower in high magnetic fields: Electron-phonon mass enhancement

We calculate the adiabatic thermopower in a high magnetic field. Continuing our previous work, we derive a many-body transport equation including the magnetic field and derive the high-field conductivity tensor $\stackrel{}{\sigma }$. The transport equation is derived by both the Keldysh and the Kadanoff-Baym nonequilibrium formulation of many-body systems. The results published by Opsal, Thaler, and Bass are confirmed to a certain extent. Electron-phonon mass enhancement is present in the adiabatic thermopower in high magnetic fields.