Figure 5
From: Ambipolar surface conduction in oxygen sub-stoichiometric molybdenum oxide films
As the temperature increases above 200 °C the density of states of the IB decreases (a) and at 400 °C, when the sample is fully oxidized, it vanishes and, moreover, the wavefunctions at the bottom of the CB and the top of VB delocalize (b). A number of individual states remains within the gap giving rise to significant leakage current. (Note: The movement of electrons is represented by solid and that of holes by dashed arrows).
