From spin-polarized interfaces to giant magnetoresistance in organic spin valves

Article

关键词: MOLECULAR SPINTRONICS;    ROOM-TEMPERATURE;    SINGLE-MOLECULE;    SEMICONDUCTORS;    SPINTERFACE;   

DOI  :  10.1103/PhysRevB.89.115407

来源: SCIE

【 摘 要 】

We calculate the spin-polarized electronic transport through a molecular bilayer spin valve from first principles, and establish the link between the magnetoresistance and the spin-dependent interactions at the metal-molecule interfaces. The magnetoresistance of a Fe vertical bar bilayer-C-70 vertical bar Fe spin valve attains a high value of 70% in the linearresponse regime, but it drops sharply as a function of the applied bias. The current polarization has a value of 80% in linear response and also decreases as a function of bias. Both these trends can be modeled in terms of prominent spin-dependent Fe vertical bar C-70 interface states close to the Fermi level, unfolding the potential of spinterface science to control and optimize spin currents.

【 授权许可】

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