扭曲二硒化铂自旋轨道耦合的云纹工程
Moiré Engineering of Spin-Orbit Coupling in Twisted Platinum Diselenide
摘要：
利用大规模从头计算方法结合泛函重整化群研究了双硒化铂扭曲双层膜的电子结构和关联相。PtSe $_2$是X族过渡金属二硫属化物，其在扭转双层中以小扭转角承载出射平带。值得注意的是，我们发现莫尔工程可以用来调整Rashba自旋轨道相互作用的强度，以一种新颖的方式改变电子行为。我们发现，一个有效的三角形晶格之间的扭曲控制的比例动力学和自旋轨道耦合尺度可以实现。即使占主导地位的自旋轨道耦合可以以这种方式访问，我们讨论的相互作用驱动的相图，其特点是明显的奇异超导和纠缠的自旋电荷密度波的后果。
英文摘要：
We study the electronic structure and correlated phases of twisted bilayers of platinum diselenide using large-scale ab initio simulations combined with the functional renormalization group. PtSe$_2$ is a group-X transition metal dichalcogenide, which hosts emergent flat bands at small twist angles in the twisted bilayer. Remarkably, we find that moiré engineering can be used to tune the strength of Rashba spin-orbit interactions, altering the electronic behavior in a novel manner. We reveal that an effective triangular lattice with a twist-controlled ratio between kinetic and spin-orbit coupling scales can be realized. Even dominant spin-orbit coupling can be accessed in this way and we discuss consequences for the interaction driven phase diagram, which features pronounced exotic superconducting and entangled spin-charge density waves.
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