Large pure spin current generation in metallic nanostructures
Large pure spin current generation in metallic nanostructures
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DOI：
10.1007/s00339-012-7495-0
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发表时间：
2013-05-01
影响因子：
2.7
通讯作者：
Kimura, Takashi
中科院分区：
文献类型：
--
作者：
Bakaul, Saidur R.;Hu, Shaojie;Kimura, Takashi
纯自旋电流对应于自旋角动量的流动，而不与任何净电荷电流相关联，并且具有被纳入基于非局域自旋注入的特殊功能和高性能器件中的潜力。为了在实际器件中利用纯自旋电流，必须提高自旋产生效率。在这篇文章中，我们讨论了两种特殊的配置的非本地设备，称为多端注入器和纳米柱设备，具有巨大的潜力，以克服焦耳加热问题，提高纯自旋电流产生的关键瓶颈。我们还展示了由于纯自旋电流注入在纳米柱为基础的非本地设备的纳米尺寸的铁磁体的磁化开关。
Pure spin current corresponds to the flow of spin angular momentum without associating any net charge current, and possesses potential to be incorporated in special functional and high-performance devices based on nonlocal spin injection. To utilize pure spin current in practical devices, it is imperative to increase the spin generation efficiency. In this article we discuss two special configurations of nonlocal devices, known as multi-terminal injector and nanopillar devices, which possess immense potential to overcome the Joule heating problem, the key bottleneck to enhance the pure spin current generation. We also demonstrate magnetization switching of a nanosized ferromagnet due to pure spin current injection in a nanopillar-based nonlocal device.