Fig. 4: Competing magnetic interactions.
From: Correlated flat bands and quantum spin liquid state in a cluster Mott insulator
a Momentum-dependent spin susceptibility \({\chi }_{{{{{{{{\bf{Q}}}}}}}}}^{spin}\) calculated with the density functional theory (DFT). b DFT + molecular orbital-dynamical mean-field theory (MO-DMFT) electronic structures. The colorbar indicates the amplitude of \({\chi }_{{{{{{{{\bf{Q}}}}}}}}}^{spin}\). c The paramagnetic electronic structure from the DFT- special quasi-random structures (SQS) calculations with DFT + U (Hubbard term strength U = 3 eV) and spin-orbit coupling.
