Hi Aaron. Thank you very much for responding. Yes, I have tried a more physically phesable distance. I initially had it set at <0.25, 0.25, 0.25>, which I am assuming should also lead to zero force, since the PBC's would create a 0k lattice right? So I'm thinking great, now let's move it in slightly to perturb the system and create some vibration. But no matter where I moved the second Si atom, it didn't help.
I want to thank you again very much. I have attached the output file you requested.
