Fig. 3
From: Uniaxial strain control of spin-polarization in multicomponent nematic order of BaFe2As2
Spin-space structure of the spin-nematic order parameter. Spin fluctuations in momentum space (left) and in real space (right) and polarization directions of the Fe spins for the three nematic components, φ xy (a, b), φ yx (c, d), and φ zz (e, f). The red arrows correspond to the magnetic ordering vector Q1 = (π, 0) and the blue arrows correspond to Q2 = (0, π). The black spheres are the Fe sites, the green sphere is the As site, and the green arrows indicate the direction of the hyperfine field
