??? spin polarization ??????? CHGCAR
?????????????
?????? spin up + spin down
?????? spin up - spin down
decompose k or band ?? charge (PARCHG)
?????? CHGCAR ???
???
?????? PARCHG ?? (??????? + ???????)/2
????????@?? k (???@?? band) spin up ?? partial charge
?????????????@?? k (???@?? band) spin down ?? partial charge