Cubic crystals: (a) simple cubic; (b) face-centered cubic, an atom in the center of every face, and

1
1-21
Cubic crystals (a) simple cubic (b)
face-centered cubic, an atom in the center of
every face, and (c) body-centered cubic. Figure
1.21
2
1-22
(a) The diamond structure consists of two
interpenetrating FCC lattices. The second FCC
cube is offset by one-quarter of the longest
diagonal. The dashed lines indicate the part of
the second FCC lattice that is outside the unit
diamond cell. (b) A zinc blende material has the
same structure, but two types of atoms. The black
atoms are one type (for example, gallium) and the
colored atoms are the other (arsenic). Figure
1.22
3
1-23
The three most important crystallographic planes
(in parentheses) and the corresponding
crystallographic directions (square
brackets). Figure 1.23
4
2-11
The density of states functions for electrons in
the conduction band and the valence band. The
density of states versus energy plot is
superimposed on the energy band diagram (energy
versus position x). Figure 2.11
5
2-12
The Fermi-Dirac distribution function gives the
probability of occupancy of an energy state E if
the state exists. Figure 2.12
6
2-13
The distribution of the electrons near the bottom
of the conduction band, n(E), is the product of
the density of states distribution S(E) times the
probability of occupancy of states f(E) at a
particular energy. The distribution of holes near
the top of the valence band p(E) is the product
of the density of states distribution times the
probability of vacancy of states at a particular
energy. (a) n type, (b) p type. Figure 2.13
7
2-17
The electron distribution function n(E) as a
function of energy (energy on the vertical
axis). Figure 2.17