Fig. 3: The projected density of states (PDOS).
From: Low-spin state of Fe in Fe-doped NiOOH electrocatalysts
The PDOS of d states of Fe (LS and HS solutions) and Ni cations for Fe-doped NiOOH bulk (left panels (a) and (c)) and surface (right panels (b) and (d)). The upper (filled) and lower (non-filled) regions represent the DOS of majority and minority spin states, respectively. The red and blue colors represent d states of Fe and Ni, respectively.
