Section COULOMB

• Setup parameters for the evaluation of the COULOMB term in SE calculations.

• Section path: CP2K_INPUT / FORCE_EVAL / DFT / QS / SE / COULOMB

• This section cannot be repeated.

• Subsections

  • none

• Keywords

  • CUTOFF
  • RC_RANGE
  • RC_TAPER

• Keyword descriptions

  CUTOFF
  	CUTOFF {Real}
  	Atomic Cutoff Radius Cutoff for the evaluation of the Coulomb integrals. For non-periodic calculation the default value is exactly the full cell dimension, in order to evaluate all pair interactions. Instead, for periodic calculations the default numerical value is used.
  	This keyword cannot be repeated and it expects precisely one real.
  	Default value: 1.20000000E+01
  	Default unit: [angstrom]

  RC_RANGE
  	RC_RANGE {Real}
  	Range of cutoff switch function (tapering): 0.5*(1-TANH((r-r0)/RC_RANGE)), where r0=2.0*RC_TAPER-20.0*RC_RANGE.
  	This keyword cannot be repeated and it expects precisely one real.
  	Default value: 0.00000000E+00
  	Default unit: [angstrom]

  RC_TAPER
  	RC_TAPER {Real}
  	Atomic Cutoff Radius Cutoff for Tapering Coulomb integrals. If not specified it assumes the same value specified for the CUTOFF.
  	This keyword cannot be repeated and it expects precisely one real.
  	Default unit: [angstrom]