limit_classical_density

Calling sequence

classical{ limit_classical_density }

Properties

  • usage: \(\mathrm{\textcolor{ForestGreen}{optional}}\)

  • type: integer

  • values: \(0 \leq z \leq 2\)

  • default: \(z=0\)

Functionality

This keyword can be used to improve convergence of classical Poisson and current equations by using different Fermi-Dirac Integral. It may help for solving systems with locally degenerate materials, like systems with 2DEGs, as semi-classical convergence will be reached more likely. Using it for degenerate systems may notably alter solutions and is not advised. When set to 0 then integral \(F_{1/2}\) is used. 1 results in \(F_0\), and 2 in \(F_{-1}\) being used. See Charge densities for more details.

Note

The choice of the value does not impact solutions when quasi-Fermi levels are located deep in the band gap.

Last update: 02/04/2025