QuickNote | Introduction | Mathematical
Analysis | Applet Tutorial | Applet
Worksheet | Quiz | SPICE/CAD
| References | Feedback

*Introduction*

Electrons, at thermal equilibrium with its environment (such as the
solid materials in which the electrons exist), are governed by the Fermi
statistics for their energy distribution. The so-called Fermi function,
f(E), gives the probability with which a quantum state at energy E is occupied
by an electron. The most important property is the Fermi energy, E_{F},
which enters f(E) as a key parameter.

According to the Fermi statistics, a quantum state can have a maximum of one electron.

This applet shows f(E) and the distinct energy states ('localized' because the electron sitting on the state can NOT readily move to the neighboring state) as a function of Energy, the vertical scale, and the Temperature as a variable parameter.

Try to move the Fermi level, E_{F},
using a mouse drag, and watch the electron distribution. Also try to vary
the Temperature and watch its effect.