Vortical versus skyrmionic states in the topological phase of a twisted bilayer with d -wave superconducting pairing

• Main Author: Cadorim, Leonardo R. [UNESP]
• Publication Date: 2024
• Other Authors: Sardella, Edson [UNESP], Milošević, Milorad V.
• Format: Article
• Language: eng
• Source: Repositório Institucional da UNESP
• Download full: http://dx.doi.org/10.1103/PhysRevB.110.064508; https://hdl.handle.net/11449/297598

It was recently shown that a chiral topological phase emerges from the coupling of two twisted monolayers of superconducting Bi2Sr2CaCu2O8+δ for certain twist angles. In this work, we reveal the behavior of such twisted superconducting bilayers with dx2-y2 pairing symmetry in the presence of an applied magnetic field. Specifically, we show that the emergent vortex matter can serve as a smoking gun for the detection of topological superconductivity in such bilayers. Moreover, we report two distinct skyrmionic states that characterize the chiral topological phase and provide a full account of their experimental signatures and their evolution with the twist angle.