摘要
For the organic magnetoresistance （OMAR） effect, we suggest a spin-related hopping of carriers （polarons） based on Marcus theory. The mobility of polarons is calculated with the master equation （ME） and then the magnetoresistance （MR） is obtained. The theoretical results are consistent with the experimental observation. Especially, the sign inversion of the MR under different driving bias voltages found in the experiment is predicted. Besides, the effects of molecule disorder, hyperfine interaction （HFI）, polaron localization, and temperature on the MR are investigated.
For the organic magnetoresistance （OMAR） effect, we suggest a spin-related hopping of carriers （polarons） based on Marcus theory. The mobility of polarons is calculated with the master equation （ME） and then the magnetoresistance （MR） is obtained. The theoretical results are consistent with the experimental observation. Especially, the sign inversion of the MR under different driving bias voltages found in the experiment is predicted. Besides, the effects of molecule disorder, hyperfine interaction （HFI）, polaron localization, and temperature on the MR are investigated.
基金
supported by the National Basic Research Program of China(Grant No.2010CB923402)
the National Natural Science Foundation of China(Grant Nos.11174181 and 21161160445)
the Program of Introducing Talents of Discipline to Universities,China(Grant No.B13029)
