Vortical versus skyrmionic states in the topological phase of a twisted bilayer with d -wave superconducting pairing
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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.
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Physical Review B, v. 110, n. 6, 2024.
