The dominant hopping process between the 3NN Cr atoms at R 1 = (0, 0, 0) (Cr 1 ) and {R}_{2}=(1,1,1/2) (Cr 2 ), which is mediated by the p orbitals on the Sb atom at ((1/3),(2/3),(1/4)) . Here we use Cr 1 (Cr 2 ) to present the Cr sublattice with up (down) spins.
