FBIAS_D
FBIAS_D = [real (array)]
Description: The flag FBIAS_D defines the parameter [math]\displaystyle{ D_{\mu} }[/math], which controls the slope of the central part of the Fermi-like step-shaped bias potential of the following form:
[math]\displaystyle{ \tilde{V}(\xi_1,\dots,\xi_{M_4}) = \sum_{\mu=1}^{M_4}\frac{A_{\mu}}{1+\text{exp}\left [-D_{\mu}(\frac{\xi(q)}{\xi_{0\mu}} -1) \right ]} \; }[/math]
where the sum runs over all ([math]\displaystyle{ M_4 }[/math]) coordinates the potential acts upon, which are defined in the ICONST-file by setting the status to 4.
The parameters [math]\displaystyle{ D_{\mu} }[/math] are dimensionless.
The number of items defined via FBIAS_D must equal to [math]\displaystyle{ M_4 }[/math], otherwise the calculation terminates with an error message.