Back to the main page of this manual  Input reference of CP2K version 2023.1 
CP2K_INPUT /
FORCE_EVAL /
DFT /
KG_METHOD /
XC /
XC_FUNCTIONAL /
GGA_K_ERNZERHOF
&GGA_K_ERNZERHOF {Logical} 

Activates the functional.  
This keyword cannot be repeated and it expects precisely one logical.  
The lone keyword behaves as a switch to
.TRUE. 

Default value:
.FALSE. 
SCALE {Real} 

Scales this functional  
This keyword cannot be repeated and it expects precisely one real.  
Default value:
1.00000000E+000 
_A0 {Real} 

constant term in numerator  
This keyword cannot be repeated and it expects precisely one real.  
Default value:
1.35000000E+002 
_A1 {Real} 

coefficient for x^2 in numerator  
This keyword cannot be repeated and it expects precisely one real.  
Default value:
4.60748620E001 
_A2 {Real} 

coefficient for x^4 in numerator  
This keyword cannot be repeated and it expects precisely one real.  
Default value:
1.35388578E003 
_A3 {Real} 

coefficient for x^6 in numerator  
This keyword cannot be repeated and it expects precisely one real.  
Default value:
0.00000000E+000 
_A4 {Real} 

coefficient for x^8 in numerator  
This keyword cannot be repeated and it expects precisely one real.  
Default value:
0.00000000E+000 
_B0 {Real} 

constant term in denominator  
This keyword cannot be repeated and it expects precisely one real.  
Default value:
1.35000000E+002 
_B1 {Real} 

coefficient for x^2 in denominator  
This keyword cannot be repeated and it expects precisely one real.  
Default value:
4.93659235E002 
_B2 {Real} 

coefficient for x^4 in denominator  
This keyword cannot be repeated and it expects precisely one real.  
Default value:
0.00000000E+000 
_B3 {Real} 

coefficient for x^6 in denominator  
This keyword cannot be repeated and it expects precisely one real.  
Default value:
0.00000000E+000 
_B4 {Real} 

coefficient for x^8 in denominator  
This keyword cannot be repeated and it expects precisely one real.  
Default value:
0.00000000E+000 
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