Direction inversion of spin-polarization current and exceptional tunnel magnetoresistance
Source abstract
Abstract
By the rate equation method in sequential and cotunneling regimes, we study the transport current and tunnel magnetoresistance through a single molecule magnet asymmetrically coupled to two collinear ferromagnetic electrodes. It is observed that the direction of spin-polarization current can be inversed by spin bias voltage and the adjacent magnetic field changed with left lead’s polarization. As a consequence, the tunnel magnetoresistance can reach exceptional values beyond the usual restriction of −1 to +1. Moreover, since charge current can be zero in parallel configuration and spin current stays positive, the pure spin current appears. Thus, the system may act as a spin-valve device.
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Research context
OpenAlex topics: Quantum and electron transport phenomena · Molecular Junctions and Nanostructures · Advancements in Semiconductor Devices and Circuit Design
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Physics, Taiyuan Normal University 1 , Jinzhong, Shanxi 030619, China
Department of Physics, Jinzhong University 2 , Jinzhong, Shanxi 030619, China
Funding
Shanxi Province Science Foundation for Youths · National Natural Science Foundation of China
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