Fig. 1: Concept of photonic moiré spin superlattice formation.
From: Observation of strong spin-orbit couplings in plasmonic spin-twistronics topological lattices
a Superposition of two individual C4-rotational symmetric spin lattices (top and middle) into a spin-bilayer (bottom). Insets on the side show vector diagrams of (top) the meron-like texture in C4 rotational symmetry and (bottom) the moiré lattice obtained at a twist angle 2ϑC4 = arctan(3/4) and with a total angular momentum (TAM) l = 7. b Experimentally reconstructed spin textures in Sz and (right) skyrmion number densities. Each C4-symmetric unit cell of the moiré spin lattice can be considered as a combination of skyrmion topologies with skyrmion number nsk ≈ ±1. c, d Analogous results to panels (a, b), obtained in the case of C3-rotational symmetric sublattices, with the moiré superlattice obtained at a twist angle 2ϑC3 = arccos(1/7) and a TAM l = 8.
