INIMIX

INIMIX = 0 | 1 | 2
Default: INIMIX = 1 

Description: INIMIX determines the functional form of the initial mixing matrix in the Broyden scheme (IMIX=4).

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The initial mixing matrix might influence the convergence speed for complex situations (especially surfaces and magnetic systems), nevertheless INIMIX must not be changed from the default setting: anything which can be done with INIMIX can also be done with AMIX and BMIX, and changing AMIX and BMIX is definitely preferable.

Possible choices for INIMIX are:

• INIMIX=0

Linear mixing according to the setting of AMIX

• INIMIX=1

Kerker mixing (see IMIX=1) according to the settings of AMIX and BMIX.

The mixed density is given by

$\rho _{{{\rm {mix}}}}\left(G\right)=\rho _{{{\rm {in}}}}\left(G\right)+A{\frac {G^{2}}{G^{2}+B^{2}}}{\Bigl (}\rho _{{{\rm {out}}}}\left(G\right)-\rho _{{{\rm {in}}}}\left(G\right){\Bigr )}$

with $A$=AMIX and $B$=BMIX

• INIMIX=2

No mixing (equal to INIMIX=0 and AMIX=1, not recommended)

Related Tags and Sections

IMIX, MAXMIX, AMIX, BMIX, AMIX_MAG, BMIX_MAG, AMIN, MIXPRE, WC

Examples that use this tag

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