2.3 The electron mobility is determined by collisions that come in two flavors:
(1) scattering due to phonons (lattice vibrations) and
(2) scattering due to ionized impurities.
The mobilities from phonon interactions alone, μ1, and from ionized impurities alone
μ2, depend on the electron effective mass mn, ionized impurity density Ni, and
temperature as follows:
Consider a uniformly doped N-type semiconductor with Nd = 1017cm–3 and mn =
0.27m0.
(a) Make a plot of log( ) and log( ) versus temperature from 100 to 700 K.
(b) What is the total electron mobility at 300 K

Question

2.3 The electron mobility is determined by collisions that come in two flavors:
(1) scattering due to phonons (lattice vibrations) and
(2) scattering due to ionized impurities.
The mobilities from phonon interactions alone, μ1, and from ionized impurities alone
μ2, depend on the electron effective mass mn, ionized impurity density Ni, and
temperature as follows:
Consider a uniformly doped N-type semiconductor with Nd = 1017cm–3 and mn =
0.27m0.
(a) Make a plot of log( ) and log( ) versus temperature from 100 to 700 K.
(b) What is the total electron mobility at 300 K