Work

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

Year: 2024

Type: article

Abstract: It was recently shown that a chiral topological phase emerges from the coupling of two twisted monolayers of superconducting ${\mathrm{Bi}}_{2}{\mathrm{Sr}}_{2}{\mathrm{CaCu}}_{2}{\mathrm{O}}_{8+\ensuremath{\delta}}$ for certain twist angles. In this work, we reveal the behavior of such twisted superconducting bilayers with ${d}_{{x}^{2}\ensuremath{-}{y}^{2}}$ 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.

Source: Physical review. B./Physical review. B

DOI: 10.1103/physrevb.110.064508

Authors: Leonardo R. Cadorim, Edson Sardella, Milorad V. Milošević

Institutions: University of Antwerp, Universidade Estadual Paulista (Unesp), Universidade Federal de Mato Grosso

Language: English

Topic: Topological Materials and Phenomena

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green