Large Magnetoresistance at Room Temperature in Organic Molecular Tunnel Junctions with Nonmagnetic Electrodes
作者： Zuoti Xie , Sha Shi , Feilong Liu , Darryl L. Smith , P. Paul Ruden
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摘要: We report room-temperature resistance changes of up to 30% under weak magnetic fields (0.1 T) for molecular tunnel junctions composed oligophenylene thiol molecules, 1–2 nm in length, sandwiched between gold contacts. The magnetoresistance (MR) is independent field orientation and the length molecule; it appears be an interface effect. Theoretical analysis suggests that source MR a two-carrier (two-hole) interaction at interface, resulting spin coupling tunneling hole localized Au/molecule contact. Such leads significantly different singlet triplet transmission barriers interface. Even impede relaxation processes thus modify ratio holes via state versus state, which large MR. Overall, experiments suggest significant opportunities explore effects based on widely available molec...
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