Removing DFTB interaction between particular atoms?

Rafael Soler-Crespo rasole... at
Wed Nov 5 15:35:51 UTC 2014

Hi all,

I'm trying to perform a calculation to replicate a MD paper on CP2K using 
DFTB to see if the findings still hold (out of curiosity). In this paper, a 
crack is imposed on graphene by removing explicitly atoms from the 
material. I want to do this a little differently by turning off 
interactions between two neighboring carbon atoms. My system has around 
7000 carbon atoms, and I want to forcefully zero any interactions between 
two adjacent C atoms. I searched around the documentation, but I couldn't 
find a great way to do this. Is it possible for someone to let me know if 
this is possible in CP2K, and if it is not, if it could be coded in 

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