DOS¶

sisl.physics.electron.DOS(E, eig, distribution='gaussian')[source]¶

Calculate the density of states (DOS) for a set of energies, E, with a distribution function

The \(\mathrm{DOS}(E)\) is calculated as:

\[\mathrm{DOS}(E) = \sum_i D(E-\epsilon_i) \approx\delta(E-\epsilon_i)\]

where \(D(\Delta E)\) is the distribution function used. Note that the distribution function used may be a user-defined function. Alternatively a distribution function may be retrieved from distribution.

Parameters

Earray_like: energies to calculate the DOS at
eigarray_like: electronic eigenvalues
distributionfunc or str, optional: a function that accepts \(\Delta E\) as argument and calculates the distribution function.

Returns

numpy.ndarray: DOS calculated at energies, has same length as E