Figure 3

(a) Energy filtering effect in the half-Heusler/full-Heusler composites consisting of the half-Heusler matrix with the full-Heusler nanophase.⁶⁰ (b) Modulation doping in a two-phase nanocomposite consisting of the Si₉₅Ge₅ matrix and a large fraction of phosphorus-doped high Ge content Si₇₀Ge₃₀P₃ nanophase.⁶²