View source for CMBJ

{{TAGDEF|CMBJ|[real (array)]|calculated self-consistently}}

Description: defines the <math>c</math> parameter in the MBJ potential.
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The {{TAG|CMBJ}} tag can be set in the following ways:
*Specify a constant that is used at every point of space <math>\mathbf{r}</math><pre>CMBJ = c</pre>

*Specify one entry per atomic type<pre>CMBJ = c_1 c_2 .. c_n</pre> where the order and number <math>n</math> is in accordance with atomic types in your {{FILE|POSCAR}} file. The MBJ exchange potential at a point <math>\mathbf{r}</math> will then be calculated using the parameter <math>c_{i}</math> belonging to the atomic species of the atomic site nearest to <math>\mathbf{r}</math>.

If {{TAG|CMBJ}} is not set, <math>c</math> is calculated at each electronic step as the average of <math>\left\vert\nabla n\right\vert/n</math> in the unit cell, as explained in the description of the {{TAG|METAGGA}} tag.

== Related tags and articles ==
{{TAG|METAGGA}},
{{TAG|CMBJA}},
{{TAG|CMBJB}},
{{TAG|CMBJE}},
{{TAG|SMBJ}},
{{TAG|RSMBJ}},
{{TAG|LASPH}},
{{TAG|LMAXTAU}},
{{TAG|LMIXTAU}}

{{sc|CMBJ|Examples|Examples that use this tag}}

== References ==
<references/>

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[[Category:INCAR tag]][[Category:Exchange-correlation functionals]]