FBIAS_D

FBIAS_D = [real (array)]

Description: Sets the slope of the bias potential.

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.

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