Magnetic Effect On Hopping Rate Of Electrons In Organic Semiconductors

Considering effects of molecular vibration (omega(0)), hyperfine interaction (J), spin energy split, spin flip, and spin entanglement (eta) of electron with nucleus on the hopping rate of electrons in organic semiconductors, we establish a model to calculate organic magnetoresistance (OMAR) within magnetic field B of 1 T. The results show that the effect of spin energy split is minimal, omega(0) influences the gradient of OMAR to B in high field, J influences the OMAR in low field, the spin flip shows impact mainly in low field, eta affects OMAR throughout the considered magnetic field and turns the high-field OMAR from positive to negative value. (c) 2013 AIP Publishing LLC.