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MA: Fachverband Magnetismus
MA 33: Non-Skyrmonic Magnetic Textures I
MA 33.6: Vortrag
Donnerstag, 20. März 2025, 10:45–11:00, H16
Emergence of topological superconductivity in the presence of chiral magnetism in 2D CrInTe3 — •Arnob Mukherjee1, Fengyi Zhou2, Soheil Ershadrad1, Tanay Nag3, Duo Wang2, and Biplab Sanyal1 — 1Department of Physics and Astronomy, Uppsala University, Box-516, 75120 Uppsala, Sweden — 2Faculty of Applied Sciences, Macao Polytechnic University, Macao SAR, 999078, China — 3Department of Physics, BITS Pilani-Hyderabad Campus, Telangana 500078, India
We propose a framework for designing two-dimensional (2D) topological superconductors (TSCs) using a bilayer hybrid system of monolayer CrInTe3 with noncoplanar magnetic textures coupled to a 2D s-wave superconductor. This hybrid system induces a topological superconducting phase, serving as a platform for realizing the 2D Kitaev model and supporting Majorana zero-energy modes via emergent p-wave pairing. Using Density functional theory calculations, we calculate the essential magnetic parameters, such as Heisenberg exchange and Dzyaloshinskii-Moriya interactions (DMI) using the LKAG approach. Large-scale Monte Carlo simulations reveal that the substantial DMI stabilizes a noncoplanar spiral magnetic state without external fields. In this phase, we observe a transition from dipolar to edge modes in the zero-energy local density of states as the chemical potential varies. Under finite magnetic fields, the system exhibits a mixed magnetic state with isolated skyrmions and spiral domain walls, leading to unique low-energy electronic states and insulating behavior.
Keywords: 2D Topological superconductivity; Noncoplanar magnetism; Majorana zero energy mode; Magnet–superconductor hybrid systems; DFT and Monte Carlo simulations