  The tunnel magneto-Seebeck effect is the dependence of the thermopower of
magnetic tunnel junctions on the magnetic configuration. It is conventionally
interpreted in terms of a thermoelectric generalization of the tunnel
magnetoresistance. Here, we investigate the heat-driven electron transport in
these junctions associated with electron-magnon scattering, using stochastic
Landau-Lifshitz phenomenology and quantum kinetic theory. Our findings
challenge the widely accepted single-electron picture of the tunneling
thermopower in magnetic junctions.
