令举,关于为什么分波态不等于总波态,我写邮件问了问VASP,他们给出了解释。下面是他们的回信:
Dear Colleague
vasp is NOT based on local orbitals basis sets, but on (augmented) plane waves.
all projected quatities are calculated by integrating the related quatnities (here: charge density) over spheres with r=RWIGS, centered at the atoms' positions. if the spheres overlap, part of the cell's volume is integrated twice, the contributions to the volume which are not covered by these spheres are not accounted for at all. Therefore, it is very unlikely that the local DOS sum up to the total DOS exactly.
This behaviour is common to all PW or mixed basis set methods.
yours sincerely
vasp-support