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首页> 外文期刊>Physical review >Spin-caloric transport properties of cobalt nanostructures: Spin disorder effects from first principles
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Spin-caloric transport properties of cobalt nanostructures: Spin disorder effects from first principles

机译：钴纳米结构的自发热量传输性质：自旋原理的自旋无序效应

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摘要

The fundamental aspects of spin-dependent transport processes and their interplay with temperature gradients, as given by the spin Seebeck coefficient, are still largely unexplored and a multitude of contributing factors must be considered. We used density functional theory together with a Monte-Carlo-based statistical method to simulate simple nanostructures, such as Co nanowires and films embedded in a Cu host or in vacuum, and investigated the influence of spin disorder scattering on electron transport at elevated temperatures. While we show that the spin-dependent scattering of electrons due to temperature-induced disorder of the local magnetic moments contributes significantly to the resistance, thermoelectric, and spin-caloric transport coefficients, we also conclude that the actual magnitude of these effects cannot be predicted, quantitatively or qualitatively, without such detailed calculations.
机译：自旋塞贝克系数给出的自旋依赖性输运过程的基本方面及其与温度梯度的相互影响，仍在很大程度上尚未得到探索，必须考虑多种影响因素。我们将密度泛函理论与基于Monte-Carlo的统计方法一起使用，以模拟简单的纳米结构，例如Co纳米线和嵌入Cu主体或真空中的薄膜，并研究了自旋无序散射对高温下电子传输的影响。尽管我们显示了由于温度引起的局部磁矩无序所引起的电子的自旋依赖性散射对电阻，热电和自旋热输运系数有显着贡献，但我们还得出结论，无法预测这些效应的实际强度进行定量或定性分析，无需进行此类详细计算。

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  • 来源
    《Physical review》 |2014年第13期|134417.1-134417.9|共9页
  • 作者

    Roman Kovacik; Phivos Mavropoulos; Daniel Wortmann; Stefan Bluegel;

  • 作者单位

    Peter Gruenberg Institut and Institute for Advanced Simulation, Forschungszentrum Juelich and JARA, 52425 Juelich, Germany;

    Peter Gruenberg Institut and Institute for Advanced Simulation, Forschungszentrum Juelich and JARA, 52425 Juelich, Germany;

    Peter Gruenberg Institut and Institute for Advanced Simulation, Forschungszentrum Juelich and JARA, 52425 Juelich, Germany;

    Peter Gruenberg Institut and Institute for Advanced Simulation, Forschungszentrum Juelich and JARA, 52425 Juelich, Germany;

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  • 正文语种 eng
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  • 关键词

    thermoelectric and thermomagnetic effects; theory of electronic transport; scattering mechanisms;

    机译：热电和热磁效应;电子运输理论;散射机制;

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