Aspects of Topological Superconductivity in 2D Systems: Noncollinear Magnetism, Skyrmions, and Higher-order Topology

The review is aimed at highlighting the aspects of topological superconductivity in absence spin-orbit interaction two-dimensional systems with long-range non-collinear spin ordering or magnetic skyrmions. Another purpose to give a brief introduction new concept superconductivity, i.e. higher-order topology including coupled structures. formation Majorana modes due textures discussed. role effective triplet pairings and odd fermion parity ground state wave function different emphasized. We describe peculiarities skyrmions, leading defects on which are localized. problem braiding systems, especially superconductors, considered.