论文标题
在过渡金属二分法和Permalloy的二维界面处的大型旋转转换
Large spin-to-charge conversion at the two-dimensional interface of transition metal dichalcogenides and permalloy
论文作者
论文摘要
旋转电荷转换是实施自旋设备的必不可少的要求。最近，由于其高自旋轨道耦合和晶体结构中缺乏反转对称性，半导体过渡金属二盐元素（TMD）（TMDS）引起了人们对旋转转换的兴趣。但是，在基于TMD的界面上直接测量自旋转换的报告非常有限。在这里，我们报告了室温观察，该室温是由Ni $ _ {80} $ fe $ _ {20} $（PY）和四个不同的大面积（$ \ sim 5 \ sim 5 \ times 2 $ 〜mm $ $ $^2 $^2 $）单层（ml）$ $ $ $ _ 2 $ _ 2 $ _ 2 $ _ 2 $ _ 2 $ _ 2 $^2 $^2 $ _ 2 $ _ 2 $^2 $^2 $ _ 2 WSE $ _2 $。我们表明，旋转混合电导和Rashba效率参数（$λ_{iree} $）都具有ML TMD层的自旋轨道耦合强度。 $λ_{iRee} $参数的范围在$ -0.54 $和$ -0.76 $ nm之间，对于四个单层TMD，表明大型旋转转换转换。我们的发现表明，TMD/Ferromagnet界面可用于有效地生成和检测自旋电流，为新型Spintronic设备开辟了新的机会。
Spin-to-charge conversion is an essential requirement for the implementation of spintronic devices. Recently, monolayers of semiconducting transition metal dichalcogenides (TMDs) have attracted considerable interest for spin-to-charge conversion due to their high spin-orbit coupling and lack of inversion symmetry in their crystal structure. However, reports of direct measurement of spin-to-charge conversion at TMD-based interfaces are very much limited. Here, we report on the room temperature observation of a large spin-to-charge conversion arising from the interface of Ni$_{80}$Fe$_{20}$ (Py) and four distinct large area ($\sim 5\times2$~mm$^2$) monolayer (ML) TMDs namely, MoS$_2$, MoSe$_2$, WS$_2$, and WSe$_2$. We show that both spin mixing conductance and the Rashba efficiency parameter ($λ_{IREE}$) scales with the spin-orbit coupling strength of the ML TMD layers. The $λ_{IREE}$ parameter is found to range between $-0.54$ and $-0.76$ nm for the four monolayer TMDs, demonstrating a large spin-to-charge conversion. Our findings reveal that TMD/ferromagnet interface can be used for efficient generation and detection of spin current, opening new opportunities for novel spintronic devices.
