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arXiv 1402.6543cond-mat.mes-hall
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从自旋极化界面到有机自旋阀中的巨磁电阻

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

Deniz Çakır, Diana M. Otálvaro, Geert Brocks

摘要:

从第一性原理出发,计算了自旋极化电子在分子双层自旋阀中的输运,建立了金属-分子界面的磁电阻效应与自旋相关相互作用之间的联系.铁的磁电阻|双层-C70| Fe自旋阀在线性响应区达到70%的高值,但它作为外加偏压的函数急剧下降。电流极化在线性响应中具有80%的值,并且也作为偏置的函数而减小。这两种趋势都可以用显著的自旋相关Fe来模拟。|C70界面态接近费米能级,展现了自旋界面科学控制和优化自旋电流的潜力。

英文摘要:

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 inter- actions at the metal-molecule interfaces. The magnetoresistance of a Fe|bilayer-C70|Fe spin valve attains a high value of 70% in the linear response 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 modelled in terms of prominent spin-dependent Fe|C70 interface states close to the Fermi level, unfolding the potential of spinterface science to control and optimize spin currents.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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