论文标题
在无定形 - 薄膜界面处的柔性效应介导的自旋转换转换
Flexoelectric effect mediated spin-to-charge conversion at amorphous-Si thin film interfaces
论文作者
论文摘要
界面旋转是由于垂直于界面的电势而产生的。电势可以通过人工诱导，例如使用界面处的铁电和压电薄膜。诱导电势的另一种方法可能是弹性电场。可以在具有或缺乏反转对称的所有材料中观察到柔性电信，此外，不需要大的栅极偏置。在这项实验研究中，我们报告了在NI80FE20/无定形SI接口上的大型自旋转换（旋转式 - 0.578），这归因于挠性性介导的Rashba旋转轨耦合。界面处的挠性电信还产生了层间自旋声音子或flexo-magneto弹性耦合。除了自旋电荷转换外，紧张的界面还导致异常的Nernst效应增加了几乎三倍。室温下用于自旋依赖的热电行为的这种应变工程为旋转型和自旋卡通设备的实现打开了一个新窗口。
Interfacial spin to charge conversion arises due to an electric potential perpendicular to the interface. The electric potential can be artificially induced, for example, using ferroelectric and piezoelectric thin films at the interface. An alternate way to induce the electric potential could be flexoelectric field. The flexoelectricity can be observed in all the material that either have or lack inversion symmetry, additionally no large gate bias is needed. In this experimental study, we report large spin to charge conversion (spin-Hall angle- 0.578) at Ni80Fe20/amorphous-Si interfaces attributed to flexoelectricity mediated Rashba spin-orbit coupling. The flexoelectricity at the interface also gave rise to interlayer spin-acoustic phonon or flexo-magnetoelastic coupling. In addition to spin-charge conversion, the strained interfaces also led to almost three-fold increase in anomalous Nernst effect. This strain engineering for spin dependent thermoelectric behavior at room temperature opens a new window to the realization of spintronics and spin-caloritronics devices.
