Hello CP2K Community,<div><br /></div><div>I am performing DFT calculations for obtaining the total dipole moment of my non-periodic system. I want to compare the results of different approaches including Wannier Localization, Berry phase and Voronoi Integration. I find that the first two approaches give consistent moments which are different from the Voronoi moment. The results are as follows:</div><div><br /></div><div>1) WC Localization: [-6.860, -4.215, -2.087], magnitude= 8.318</div><div>2) Berry phase: [-6.863, -4.206, -2.117], magnitude= 8.324<br /></div><div>3) Voronoi integration: [-15.754, 35.152, -37.715], magnitude=53.910</div><div><br /></div><div>My approach for the moment calculation is as follows. The Berry phase moment is directly accessible from CP2K log/output file. For the Wannier method, CP2K outputs the charge positions in a .xyz file which I use along with the corresponding charge values. Finally, in the output "*.voronoi" file, there are multiple columns three of which are "Dipole(x) Dipole(y) Dipole(z)". I perform a summation of these three columns/components over the different atoms (rows) to get the total dipole moment. Moreover, the related input section is given below:</div><div><br /></div><div>&DFT</div><div> &LOCALIZE #WC Localization<br /> &PRINT<br /> &WANNIER_CENTERS<br /> IONS+CENTERS .TRUE.<br /> &END<br /> &END<br /> &END<br /> &PRINT<br /> &MOMENTS # Berry phase<br /> PERIODIC F<br /> &END<br /> &VORONOI # Voronoi integration<br /> OUTPUT_TEXT T<br /> SANITY_CHECK T<br /> VERBOSE T<br /> VORONOI_RADII VDW<br /> &END<br /> &END<br /></div><div>&END</div><div><br /></div><div>I wonder how I can get a Voronoi Moment consistent with the other two approaches. I searched the CP2K forum but there was no mention of a similar experience. Thanks in advance for your help and comment!</div>
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