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Chapter 11 Density of States, Fermi Energy and Energy Bands

11-1. Chapter 11 Density of States, Fermi Energy and Energy Bands Contents Chapter 11 Density of States, Fermi Energy and Energy Bands .. 11-1. Contents .. 11-1. Current and Energy Transport .. 11-1. Electron Density of States .. 11-2. Dispersion Relation .. 11-2. Effective mass .. 11-3. Density of States .. 11-5. Fermi -Dirac Distribution .. 11-7. Electron Concentration .. 11-8. Fermi Energy in Metals .. 11-9. EXAMPLE Fermi Energy in Gold .. 11-11. Fermi Energy in 11-12. EXAMPLE Fermi Energy in Doped Semiconductors .. 11-13. Energy Bands .. 11-14. Multiple Bands .. 11-15.

principal effective masses (Figure 11.3). Therefore, the density-of-states effective mass is expressed as 3 1 2 d l m t (11.26) where m l is the longitudinal effective mass and m t is the transverse effective mass. (a) (b) Figure 11.3 Constant electron energy surfaces in the Brillouin zones (space or k-space): (a) a

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