FBIAS A: Difference between revisions
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{{TAGDEF|FBIAS_A|[real (array)]}} | {{TAGDEF|FBIAS_A|[real (array)]}} | ||
Description: Defines the | Description: Defines the step height for the bias potential in <math>eV</math>. | ||
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{{TAG|FBIAS_A}} defines the height of the step (<math>A_{\mu}</math>) in the Fermi-like step-shaped bias potential of the following form: | |||
::<math> | ::<math> | ||
Revision as of 06:19, 24 April 2023
FBIAS_A = [real (array)]
Description: Defines the step height for the bias potential in [math]\displaystyle{ eV }[/math].
FBIAS_A defines the height of the step ([math]\displaystyle{ A_{\mu} }[/math]) in 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 units of [math]\displaystyle{ A_{\mu} }[/math] are [math]\displaystyle{ eV }[/math].
The number of items defined via FBIAS_A must be equal to [math]\displaystyle{ M_4 }[/math], otherwise the calculation terminates with an error message.