论文标题
二维D0 Orbital XY单层中的量子异常大厅和山谷量子异常大厅效应
Quantum Anomalous Hall and Valley Quantum Anomalous Hall Effects in Two-Dimensional d0 Orbital XY Monolayers
论文作者
论文摘要
我们提出了一个新的D0轨道XY家族（X = K，RB，CS; Y = N，P，AS，SB，BI）单层具有丰富而新颖的拓扑结构和山谷特性。 KN，RBN，RBP，RBA，CSP，CSA和CSSB单层具有显着的量子异常效应（QAHE）。 CSSB单层还表现出非凡的山谷Qahe，并具有巨大的分裂。此外，由于PX; Y和PZ轨道之间的应变诱导的带反转，因此可以通过平面应变来有效地调节XY单层的拓扑特性。我们的发现表明，D0轨道XY单层可以是在Spintronics和多功能拓扑基于的设备中有希望应用的良好候选者。
We propose a new family of the d0 orbital XY (X = K, Rb, Cs; Y = N, P, As, Sb, Bi) monolayers with abundant and novel topology and valley properties. The KN, RbN, RbP, RbAs, CsP, CsAs, and CsSb monolayers possess remarkable quantum anomalous Hall effect (QAHE). CsSb monolayer also exhibits extraordinary valley QAHE with giant splitting. Moreover, the topological properties of XY monolayers can be effciently tuned by the in-plane strain, owing to the strain-induced band inversion between the px;y and pz orbitals. Our findings suggest that the d0 orbital XY monolayers can be good candidates for promising applications in the spintronics and multifunctional topological-based devices.
