fermi_dirac

sisl.physics.fermi_dirac(E, kT: float = 0.1, mu=0.0)

Fermi-Dirac distribution function

\[n_F(E,k_BT,\mu) = \frac1{\exp\Big[\frac{E - \mu}{k_BT}\Big] + 1}\]

Parameters:

• E (array_like) – energy evaluation points

• kT – temperature broadening

• mu (array_like, optional) – chemical potential

Returns:

numpy.ndarray – the Fermi-Dirac distribution, same length as E