Fig. 1: Unit Cell of the Semiconductor Gallium Arsenide (IMAGE)

Forschungsverbund Berlin

Fig. 1: Unit Cell of the Semiconductor Gallium Arsenide

Caption

(a) Unit cell of the semiconductor gallium arsenide (GaAs). Chemical bonds (blue) connect every Ga atom to four neighboring As atoms and vice versa. Valence electron density in the grey plane of (a) in the (b) ground state (the electrons are in the valence band) and in the (c) excited state (electrons are in the conduction band). Apart from the valence electrons shown, there are tightly bound electrons near the nuclei.

Credit

MBI Berlin

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