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Organic magnetoresistance based on hopping theory

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【作者】 杨福江； 解士杰；

【Author】 Yang Fu-Jiang;Xie Shi-Jie;School of Physics,State Key Laboratory of Crystal Materials,Shandong University;

【机构】 School of Physics,State Key Laboratory of Crystal Materials,Shandong University；

【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.

【Abstract】 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.

【关键词】 hopping； organic magnetoresistance； master equation； hyperfine interaction；
【Key words】 hopping； organic magnetoresistance； master equation； hyperfine interaction；
【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)
  • 【文献出处】 Chinese Physics B ,中国物理B , 编辑部邮箱 ,2014年09期
  • 【分类号】O469
  • 【被引频次】1
  • 【下载频次】11
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