IBRION=3 bulk optimization: Difference between revisions

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New page: To choose a proper value for the POTIM in case of a IBRION=3 bulk optimization, you first need to perform a frequency calculation, setting in the INCAR file IBRION = 5 ...
 
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To choose a proper value for the POTIM in case of a IBRION=3 bulk optimization, you first need to perform a frequency calculation, setting in the INCAR file
To choose a proper value for the POTIM in case of a IBRION=3 bulk optimization, you first need to perform a frequency calculation, setting in the INCAR file
        
        
   IBRION =  5        
frequencies:
   POTIM  =  0.020 #                   
   IBRION =  5     #   
   NFREE  =  2    #
  EDIFF  =  1E-7  #
   POTIM  =  0.010 #                   
   NFREE  =  2    #  
 
When this calculation converge you need to

Revision as of 11:03, 23 October 2018

To choose a proper value for the POTIM in case of a IBRION=3 bulk optimization, you first need to perform a frequency calculation, setting in the INCAR file

frequencies:

 IBRION =   5     #     
 EDIFF  =  1E-7   # 
 POTIM  =   0.010 #                  
 NFREE  =   2     # 

When this calculation converge you need to