limit_classical_density

Calling sequence

classical{ limit_classical_density }

Properties

• usage: $\mathrm{optional}$

• type: integer

• values: $0\le z\le 2$

• 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.

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Last update: 02/04/2025