What is the expression of carrier mobility of a semiconductor material? (Where e is electric field, n is carrier density, and σ is conductivity)
1
\(\rm \mu = \frac{\sigma}{ne}\)
2
\(\rm \mu = \frac{ne}{\sigma}\)
3
\(\rm \mu = \frac{1}{\sigma}\)
4
\(\rm \mu = \frac{1}{ne}\)