Fig. 2
Pump dependence of chiral spin model parameters. Photo-induced time-reversal symmetry (TRS) breaking scalar spin chirality χ, χ′ (a, b) and TRS preserving Heisenberg exchange J′, J 3 (c, d) terms for a Kagome Mott insulator pumped by circularly polarized light, as a function of pump strength A and pump frequency (from Eqs. (4)–(10)). Parameters are depicted in units of nearest-neighbor exchange coupling J. Dashed lines indicate one- and two-photon resonances with respect to the Hubbard repulsion U. Equal signs of χ, χ′ signify a staggering of S i · (S j × S k ) contributions between elementary triangles and isosceles triangles inside the hexagons
