The electronic properties of the ternary-compound semiconductor, AlGaAs, depend on the alloy composition. This applet shows a single information in three different ways:

• In the top diagram, the minimum energies of the conduction band valleys, the Gamma-, L- and X-point valleys, are plotted as a function of the Al composition. The reference energy is the top of the valence band, i.e., E = E_v = 0 eV.
• The lower-left diagram shows the E-K diagram (Energy - K vector diagram).  It shows the three important conduction band valleys (Gamma, L, and X valleys) and the light-hole (lh) and heavy-hole (hh) bands in the K-space (reciprocal space).
• The lower-right diagram shows the conventional (simplified) energy band diagram of the semiconductor.