Chapter 11 Density of States, Fermi Energy and Energy Bands

Density of States Thermoelectric materials typically exhibit the directional behavior. Therefore, in general we have z z y y x x m k m m k E 22 2! (11.15) where m x, m y, and m z are the principal effective masses in the x-, y-, z-directions and here k is the magnitude of the wavevector. 2 2 2 2 x y k z (11.16) ................
................