中文

过渡金属硫族化合物与坡莫合金二维界面处的大自旋-电荷转换

应用物理 2022-09-02 v1

摘要

自旋-电荷转换是实现自旋电子器件的基本要求。近来,半导体过渡金属硫族化合物(TMDs)单层因其高自旋轨道耦合及晶体结构缺乏反演对称性,在自旋-电荷转换方面引起广泛关注。然而,基于 TMD 的界面处自旋-电荷转换直接测量的报道十分有限。在此,我们报道了在室温下观察到 Ni80_{80}Fe20_{20}(Py)与四种大面积(5×2\sim 5\times2~mm2^2)单层(ML)TMDs——即 MoS2_2、MoSe2_2、WS2_2 和 WSe2_2——界面处产生的大自旋-电荷转换。我们表明,自旋混合电导与 Rashba 效率参数(λIREE\lambda_{IREE})均随 ML TMD 层的自旋轨道耦合强度而缩放。四种单层 TMD 的 λIREE\lambda_{IREE} 参数介于 0.54-0.540.76-0.76 nm 之间,显示出大的自旋-电荷转换。我们的发现揭示,TMD/铁磁体界面可用于高效产生与探测自旋流,为新型自旋电子器件开辟了新机遇。

关键词

引用

@article{arxiv.2209.00332,
  title  = {Large spin-to-charge conversion at the two-dimensional interface of transition metal dichalcogenides and permalloy},
  author = {Himanshu Bangar and Akash Kumar and Niru Chowdhury and Richa Mudgal and Pankhuri Gupta and Ram Singh Yadav and Samaresh Das and P. K. Muduli},
  journal= {arXiv preprint arXiv:2209.00332},
  year   = {2022}
}

备注

This document is the unedited Author's version of a Submitted Work that was subsequently accepted for publication in ACS Appl. Mater. Interfaces [copyright ACS Publishing] after peer review