Applied Physics Department and the Center for Nano-Science and Nano-Technology, The Hebrew University of Jerusalem , Jerusalem 91904 Israel.
Nano Lett. 2014 Nov 12;14(11):6042-9. doi: 10.1021/nl502391t. Epub 2014 Oct 16.
With the increasing demand for miniaturization, nanostructures are likely to become the primary components of future integrated circuits. Different approaches are being pursued toward achieving efficient electronics, among which are spin electronics devices (spintronics). In principle, the application of spintronics should result in reducing the power consumption of electronic devices. Recently a new, promising, effective approach for spintronics has emerged, using spin selectivity in electron transport through chiral molecules. In this work, using chiral molecules and nanocrystals, we achieve local spin-based magnetization generated optically at ambient temperatures. Through the chiral layer, a spin torque can be transferred without permanent charge transfer from the nanocrystals to a thin ferromagnetic layer, creating local perpendicular magnetization. We used Hall sensor configuration and atomic force microscopy (AFM) to measure the induced local magnetization. At low temperatures, anomalous spin Hall effects were measured using a thin Ni layer. The results may lead to optically controlled spintronics logic devices that will enable low power consumption, high density, and cheap fabrication.
随着对微型化的需求不断增加，纳米结构很可能成为未来集成电路的主要组成部分。为了实现高效电子学，人们正在探索不同的方法，其中包括自旋电子学器件（自旋电子学）。原则上，自旋电子学的应用应该会降低电子设备的功耗。最近，一种新的、有前途的、有效的自旋电子学方法出现了，它利用手性分子中电子输运的自旋选择性。在这项工作中，我们使用手性分子和纳米晶体在环境温度下实现了光诱导的局域自旋磁化。通过手性层，可以在不进行纳米晶体向薄铁磁层的永久电荷转移的情况下传递自旋扭矩，从而产生局域垂直磁化。我们使用霍尔传感器配置和原子力显微镜 (AFM) 来测量感应的局域磁化。在低温下，使用薄镍层测量了反常自旋霍尔效应。这些结果可能会导致光控自旋电子逻辑器件，从而实现低功耗、高密度和低成本制造。
