论文标题
在扭曲双层的拓扑阶段，涡旋和涡流状态与$ d $ - 波超导配对
Vortical versus skyrmionic states in the topological phase of a twisted bilayer with $d$-wave superconducting pairing
论文作者
论文摘要
最近显示，手性拓扑阶段来自两个超导bi $ _2 $ _2 $ sr $ _2 $ _2 $ cacu $ _2 $ _2 $ o $ _ {8+Δ} $的超导二扭曲单层的耦合。在这项工作中，我们揭示了在存在磁场的情况下，使用$ d_ {x^2-y^2} $配对对称性的这种扭曲超导双层的行为。具体而言，我们表明，新兴的涡流物质可以用作吸烟枪，以检测此类双层中的拓扑超导性。此外，我们报告了表征手性拓扑阶段的两个不同的天空状态，并充分说明了它们的实验特征及其以扭转角度的进化。
It was recently shown that a chiral topological phase emerges from the coupling of two twisted monolayers of superconducting Bi$_2$Sr$_2$CaCu$_2$O$_{8+δ}$ for certain twist angles. In this work, we reveal the behavior of such twisted superconducting bilayers with $d_{x^2-y^2}$ pairing symmetry in presence of applied magnetic field. Specifically, we show that the emergent vortex matter can serve as smoking gun for detection of topological superconductivity in such bilayers. Moreover, we report two distinct skyrmionic states that characterize the chiral topological phase, and provide full account of their experimental signatures and their evolution with the twist angle.
