Section GGA_X_OPTB88_VDW

• opt-Becke 88 for vdW  [Edit on GitHub]

• Section path: CP2K_INPUT / ATOM / METHOD / XC / XC_FUNCTIONAL / GGA_X_OPTB88_VDW

• This section cannot be repeated.

• Subsections

  • none

• Keywords

  • SECTION_PARAMETERS
  • SCALE
  • _BETA
  • _GAMMA

• Keyword descriptions

  SECTION_PARAMETERS
  	&GGA_X_OPTB88_VDW {Logical}
  	Activates the functional.  [Edit on GitHub]
  	This keyword cannot be repeated and it expects precisely one logical.
  	The lone keyword behaves as a switch to .TRUE.
  	Default value: .FALSE.

  SCALE
  	SCALE {Real}
  	Scales this functional  [Edit on GitHub]
  	This keyword cannot be repeated and it expects precisely one real.
  	Default value: 1.00000000E+000

  _BETA
  	_BETA {Real}
  	beta/X_FACTOR_C is the coefficient of the gradient expansion  [Edit on GitHub]
  	This keyword cannot be repeated and it expects precisely one real.
  	Default value: 3.36865924E-003

  _GAMMA
  	_GAMMA {Real}
  	gamma should be 6 to get the right asymptotics of Ex  [Edit on GitHub]
  	This keyword cannot be repeated and it expects precisely one real.
  	Default value: 6.98131701E+000