论文标题
旋转依赖性转运通过Weyl半准表面
Spin-dependent transport through a Weyl semimetal surface
论文作者
论文摘要
我们通过实验将两种类型的界面结构与磁性和非磁性Weyl半含量进行比较。它们是金色正常层和磁性Weyl Semimetal Ti $ _2 $ mnal之间的结合，分别是铁磁镍层和非磁性Weyl Semimetal wte $ _2 $。由于连接的铁磁侧，我们研究了通过Weyl半分表面的自旋极化转运。对于这两种结构，我们都表现出相似的电流 - 电压特性，在低电流处滞后，在高电阻下具有差异峰。尽管这种行为类似于铁磁结构中已知的电流诱导的磁化动力学，但磁场的电阻峰的演变是不寻常的。我们将观察到的效应与Weyl拓扑表面状态中电流诱导的自旋动力学联系起来。
We experimentally compare two types of interface structures with magnetic and non-magnetic Weyl semimetals. They are the junctions between a gold normal layer and magnetic Weyl semimetal Ti$_2$MnAl, and a ferromagnetic nickel layer and non-magnetic Weyl semimetal WTe$_2$, respectively. Due to the ferromagnetic side of the junction, we investigate spin-polarized transport through the Weyl semimetal surface. For both structures, we demonstrate similar current-voltage characteristics, with hysteresis at low currents and sharp peaks in differential resistance at high ones. Despite this behavior resembles the known current-induced magnetization dynamics in ferromagnetic structures, evolution of the resistance peaks with magnetic field is unusual. We connect the observed effects with current-induced spin dynamics in Weyl topological surface states.
