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arXiv 0709.2756cond-mat.mtrl-scicond-mat.mes-hall
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Pt纳米线中自旋霍尔效应的演化:尺寸和温度效应

Evolution of the spin Hall effect in Pt nanowires: Size and temperature effects

Laurent Vila, Takashi Kimura, YoshiChika Otani

摘要:

我们研究了自旋霍尔效应在自旋积累的材料尺寸小于或大于自旋扩散长度的情况下的演化。利用横向自旋阀结构测量了Pt的自旋吸收效率和自旋霍尔效应引起的Pt自旋积累。在恒定的外加电流下,结果表明随着Pt厚度超过自旋扩散长度,自旋累积信号的降低更加明显。这意味着自旋累积源于Pt线内部的体散射,并且自旋扩散长度限制了SHE。我们还分析了自旋霍尔电导率的温度变化,以确定占主导地位的散射机制。

英文摘要:

We have studied the evolution of the Spin Hall Effect in the regime where the material size responsible for the spin accumulation is either smaller or larger than the spin diffusion length. Lateral spin valve structures with Pt insertions were successfully used to measure the spin absorption efficiency as well as the spin accumulation in Pt induced through the spin Hall effect. Under a constant applied current the results show a decrease of the spin accumulation signal is more pronounced as the Pt thickness exceeds the spin diffusion length. This implies that the spin accumulation originates from bulk scattering inside the Pt wire and the spin diffusion length limits the SHE. We have also analyzed the temperature variation of the spin hall conductivity to identify the dominant scattering mechanism.

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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