Determination of density of states in amorphous carbon

Various methods have been employed before to deduce the density of states (DOS) in amorphous carbon. However, further investigations show that capacitance measurements on a metal-insulator-semiconductor structure are an appropriate way to deduce the DOS. Thus, an analytical formalism, which agrees well with the experimental data, is developed. This paper reports the structures and techniques used to investigate the DOS in amorphous hydrogenated carbon.