(c) The energy band structure for Si. (Adapted from Handbook of the Band Structure of Elemental Solids, D. A. Papaconstantopoulos, Plenum Press, 1986) 8. Using the Si band diagram (Figure 9.22c) answer the following: (a) Identify one hole band with large (heavy hole band) and another with relatively smaller (light hole band) mi. Include the basis for your selection. (b) Locate the Fermi level. (c) How would this diagram change if this material became amorphous. (d) Explain why many of the bands have a parabolic shape. (c) The energy band structure for Si. (Adapted from Handbook of the Band Structure of Elemental Solids, D. A. Papaconstantopoulos, Plenum Press, 1986) 7. Using the Si band diagram (Figure 9.22c), point out hole and electron bands, and for one of each kind of band, trace out and discuss the variation in the effective mass for the particle in k space