Magnetism in AV3Sb5 (A = Cs, Rb, K): Complex landscape of dynamical magnetic textures

We have investigated the dynamical magnetic properties of the V-based kagome stibnite compounds by combining the ab initio-extracted magnetic parameters of a spin-Hamiltonian, like inter-site exchange parameters, magnetocrystalline anisotropy and site projected magnetic moments, with full-fledged simulations of atomistic spin- dynamics. Our calculations reveal that, in addition to a ferromagnetic order along the [001] direction, the system hosts a complex landscape of magnetic configurations comprised of commensurate and incommensurate spin spirals along the [010] direction. The presence of such chiral magnetic textures may be the key toward solving the mystery about the origin of the experimentally observed inherent breaking of the C6 rotational, mirror, and the time-reversal symmetry.

Automated summary

We have investigated the dynamic magnetic properties of V-based kagome stibnite compounds by combining magnetic parameters extracted from ab initio calculations with atomistic spin dynamics simulations. Our calculations show the existence of a complex magnetic landscape, including commensurate and incommensurate spin spirals, in addition to a ferromagnetic order. These chiral magnetic textures may be the key to understanding the observed inherent breaking of symmetry.