Merge branch 'b-mobility-quao' into 'v3.1-stable'

|                  | $`M\ [\text{cm}^2\,\text{K}^\gamma\,\text{V}^{-1}\,\text{s}^{-1}]`$ | $` 2.5\times 10^6`$ | $` 6.3\times 10^7`$ | \[[@LandoltBornstein]\]          |

|                  | $`\gamma`$                                                          | $` 1.0`$            | $` 2.1`$            | \[[@LandoltBornstein]\]          |

The relevant set of parameters from the above table is selected automatically based on the configured material of the sensor in question.

This model can be selected in the configuration file via the parameter `mobility_model = "quay"`.

## Levinshtein Mobility

The Levinshtein mobility model describes the mobility of electron and holes in Gallium Nitride. The publication \[[@Levinshtein]\] models the electron and hole mobilities as a function of doping concentration and temperature. The temperature dependent model follows the relation