Figure 3
From: Band Structure Engineering and Thermoelectric Properties of Charge-Compensated Filled Skutterudites

Theoretical calculation of electronic band structures.
First-principles band structure calculations for (a) Co4Sb12, (b) Yb0.25Co4Sb12 and (c) Yb0.25Ga0.25Co4Sb11.875Ga0.125. The zero energy points in (b,c) represent the Fermi levels (EFs) of the two compounds.