ATC: fix_modify AtC atomic_charge

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### fix_modify AtC atomic_charge

#### syntax

fix_modify AtC <include | omit> atomic_charge

- <include | omit> = switch to activiate/deactiviate inclusion of intrinsic atomic charge in ATC

#### examples

`fix_modify atc compute include atomic_charge`

#### description

Determines whether AtC tracks the total charge as a finite element field

#### restrictions

Required for: electrostatics

#### related

#### default

if the atom charge is defined, default is on, otherwise default is off