Organic magnetoresistance based on hopping theory

被引：6
作者：
Yang Fu-Jiang [1 ]
Xie Shi-Jie [1 ]
机构：
[1] Shandong Univ, Sch Phys, State Key Lab Crystal Mat, Jinan 250100, Peoples R China
来源：
CHINESE PHYSICS B | 2014年 / 23卷 / 09期
基金：
中国国家自然科学基金;
关键词：
hopping; organic magnetoresistance; master equation; hyperfine interaction; LIGHT-EMITTING-DIODES; ROOM-TEMPERATURE; CONJUGATED POLYMER; SEMICONDUCTORS; MOBILITY; DEVICES; FIELD;
D O I：
10.1088/1674-1056/23/9/097306
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
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.
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页数：5
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