Theoretical investigation on organic magnetoresistance based on Zeeman interaction

Based on the magnetic field-spin Zeeman interaction, a mechanism is suggested to explain the organic magnetoresistance (OMR). It is found that a considerable magnetoresistance (MR) could be obtained in organic semiconductors (OSCs). The value of MR is sensitive to the carrier concentration and the mobility (or the charge-transfer integral). We speculate that the MR in organic materials should be phonon dependent. This investigation is consistent with the present experimental observations on OMR.

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► The peculiar properties of the organic materials are stressed in the study of OMR.
► The two important features of OMR can be obtained in our simulation.
► A well consistency with experimental results can also be obtained.
► We think that the specific MR in organic materials should be phonon dependent.