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首页> 外文期刊>Physical review >From spin-polarized interfaces to giant magnetoresistance in organic spin valves
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From spin-polarized interfaces to giant magnetoresistance in organic spin valves

机译：从自旋极化界面到有机自旋阀中的巨大磁阻

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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|bilayer-C_(70)|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 modeled in terms of prominent spin-dependent Fe|C_(70) interface states close to the Fermi level, unfolding the potential of spinterface science to control and optimize spin currents.
机译：我们从第一个原理计算通过分子双层自旋阀的自旋极化电子输运，并建立磁阻与金属-分子界面上自旋相关的相互作用之间的联系。 Fe | C_（70）| Fe自旋阀的磁阻在线性响应状态下达到70％的高值，但随所施加的偏压而急剧下降。电流极化的线性响应值为80％，并且也随偏置而减小。可以根据接近于费米能级的突出的自旋相关性Fe | C_（70）界面态来对这两种趋势进行建模，从而展现出spinterface科学控制和优化自旋电流的潜力。

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  • 来源
    《Physical review》 |2014年第11期|115407.1-115407.5|共5页
  • 作者

    Deniz Cakir; Diana M. Otalvaro; Geert Brocks;

  • 作者单位

    Computational Materials Science, Faculty of Science and Technology and MESA + Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands ,Collective Interactions Unit, Okinawa Institute of Science and Technology Graduate University (OIST), Okinawa 904-0495, Japan ,Department of Physics, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp, Belgium;

    Computational Materials Science, Faculty of Science and Technology and MESA + Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands;

    Computational Materials Science, Faculty of Science and Technology and MESA + Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    spin transport through interfaces; metal-semiconductor-metal structures; giant magnetoresistance;

    机译：通过接口旋转传输;金属-半导体-金属结构;巨磁阻;

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