Journal
JOURNAL OF APPLIED PHYSICS
Volume 103, Issue 7, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.2828706
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The recently proposed bipolaron model for large organic magnetoresistance (OMAR) at room temperature is extended to an analytically solvable two-site scheme. It is shown that even this extremely simplified approach reproduces some of the key features of OMAR, viz., the possibility to have both positive and negative magnetoresistance, as well as its universal line shapes. Specific behavior and limiting cases are discussed. Extensions of the model, to guide future experiments and numerical Monte Carlo studies, are suggested. (C) 2008 American Institute of Physics.
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