Charge-transfer polaron induced negative differential resistance and giant magnetoresistance in organic spin-valve systems

Based on the static polaron Su–Schrieffer–Heeger model and the nonequilibrium Green's function formalism, we investigate the negative differential resistance (NDR) effect in organic spin-valve systems at low temperature and interpret it with a self-doping picture. A giant negative magnetoresistance exceeding 300% is theoretically predicted as the results of the NDR effects.