论文标题
稀土二分法中的旋转和轨道运输：EUS $ _2 $的情况
Spin and orbital transport in rare earth dichalcogenides: The case of EuS$_2$
论文作者
论文摘要
我们执行第一原理计算，以确定稀有地球二分法的电子，磁性和传输特性，以H型EUS $ _2 $的单层为代表。我们预测，EUS $ _2 $单层的H期在用非常高的磁矩掺杂时表现出半金属的行为。我们发现，EUS $ _2 $的电子结构对库仑排斥$ U $的价值非常敏感，该价值有效地控制了EU-$ f $和S- $ P $状态之间的杂交程度。我们进一步预测，EUS $ _2 $的非平凡电子结构直接导致明显的异常霍尔效应，并具有非平凡的带拓扑。此外，虽然我们发现旋转厅效应紧密遵循系统中异常的霍尔效应，但系统的轨道复杂性会导致非常大的轨道霍尔效应，其性能非常敏感地取决于相关的强度。因此，我们的发现将基于稀土的二钙构化促进了拓扑旋转和轨道人的有前途的平台。
We perform first-principles calculations to determine the electronic, magnetic and transport properties of rare-earth dichalcogenides taking a monolayer of the H-phase EuS$_2$ as a representative. We predict that the H-phase of the EuS$_2$ monolayer exhibits a half-metallic behavior upon doping with a very high magnetic moment. We find that the electronic structure of EuS$_2$ is very sensitive to the value of Coulomb repulsion $U$, which effectively controls the degree of hybridization between Eu-$f$ and S-$p$ states. We further predict that the non-trivial electronic structure of EuS$_2$ directly results in a pronounced anomalous Hall effect with non-trivial band topology. Moreover, while we find that the spin Hall effect closely follows the anomalous Hall effect in the system, the orbital complexity of the system results in a very large orbital Hall effect, whose properties depend very sensitively on the strength of correlations. Our findings thus promote rare-earth based dichalcogenides as a promising platform for topological spintronics and orbitronics.
