Comparison with experiment electronic density of states

3 Comparison with experiment electronic density of states 

For any given electronic energy band, a corresponding density of states (DOS) function can be defined. The function DOS( ) is simply the number of energy levels within any small interval between E and E + d . Since energy levels are equally spaced, the flatter the band, the sharper and the higher the DOS function (see Fig. 6.5). The 

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