| Back to the main page of this manual | Input reference of CP2K version 7.1 | 
CP2K_INPUT /
               FORCE_EVAL /
               DFT /
               XC2ND_DERIV_ANALYTICAL {Logical} | 
               |
| Use analytical formulas or finite differences for 2nd derivatives of XC | |
| This keyword cannot be repeated and it expects precisely one logical. | |
                     The lone keyword behaves as a switch to
                     .TRUE. | 
               |
                     Default value:
                     .TRUE. | 
               
3RD_DERIV_ANALYTICAL {Logical} | 
               |
| Use analytical formulas or finite differences for 3rd derivatives of XC | |
| This keyword cannot be repeated and it expects precisely one logical. | |
                     The lone keyword behaves as a switch to
                     .TRUE. | 
               |
                     Default value:
                     .TRUE. | 
               
DENSITY_CUTOFF {Real} | 
               |
| The cutoff on the density used by the xc calculation | |
| This keyword cannot be repeated and it expects precisely one real. | |
                     Default value:
                     1.00000000E-010 | 
               
DENSITY_SMOOTH_CUTOFF_RANGE {Real} | 
               |
| Parameter for the smoothing procedure inxc calculation | |
| This keyword cannot be repeated and it expects precisely one real. | |
                     Default value:
                     0.00000000E+000 | 
               
FUNCTIONAL_ROUTINE {Keyword} | 
               |
| Select the code for xc calculation | |
| This keyword cannot be repeated and it expects precisely one keyword. | |
                     Default value:
                     NEW | 
               |
                     List of valid keywords:
                     
                     
  | 
               
GRADIENT_CUTOFF {Real} | 
               |
| The cutoff on the gradient of the density used by the xc calculation | |
| This keyword cannot be repeated and it expects precisely one real. | |
                     Default value:
                     1.00000000E-010 | 
               
TAU_CUTOFF {Real} | 
               |
| The cutoff on tau used by the xc calculation | |
| This keyword cannot be repeated and it expects precisely one real. | |
                     Default value:
                     1.00000000E-010 | 
               
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