ELPH_SELFEN_NW

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ELPH_SELFEN_NW = [integer]
Default: ELPH_SELFEN_NW = 1 

Description: Number of energies to use when computing the phonon-induced electron self-energy.


The electron self-energy, , depends on the frequency (or energy ). ELPH_SELFEN_NW controls the number and location of frequencies when computing the self-energy in the following way:

ELPH_SELFEN_NW > 0
The self-energy is computed at ELPH_SELFEN_NW equally spaced energies between and . The interval is centered around each Kohn-Sham eigenvalue, , and its width, , is controlled via ELPH_SELFEN_WRANGE. If ELPH_SELFEN_NW is an even number, it is automatically increased by one so that the center-most energy in each interval always coincides with the corresponding Kohn-Sham eigenvalue.
ELPH_SELFEN_NW < 0
The self-energy is computed at |ELPH_SELFEN_NW| equally spaced energies between and , where and are the minimum and maximum Kohn-Sham eigenvalues of the calculation, respectively. Once again, is controlled via ELPH_SELFEN_WRANGE and allows to extend the interval in both directions.