Hi, everyone
I have a simple question about input of potentials and need to make sure my understanding is correct. Assume we want to construct a bulk silicon material which composed of two different isotopes: Si28 and Si29. We can define mass for atoms as follows:
element
mass Si28 28.0
mass Si29 29.0
end
In sw2 and sw3 potentials, we should consider all possible combinations of interactions which are shown below:
sw2:
Si28 - Si28
Si28 - Si29
Si29 - Si29
sw3:
Si28 - Si28 - Si28
Si28 - Si28 - Si29
Si28 - Si29 - Si29
Si29 - Si28 - Si28
Si29 - Si29 - Si28
Si29 - Si29 - Si29
If we use the same parameters to simplify the problem, we just need to copy and paste the input of potential many times and then change pivot and terminal atoms. For example, the input of sw2 would be:
sw2 atom1 atom2 A rho B rmin rmax
Si28 core Si28 core 15.2781 2.0951 11.6032 0.0000 3.7712
sw2 atom1 atom2 A rho B rmin rmax
Si28 core Si29 core 15.2781 2.0951 11.6032 0.0000 3.7712
sw2 atom1 atom2 A rho B rmin rmax
Si29 core Si29 core 15.2781 2.0951 11.6032 0.0000 3.7712
Is that a correct way to created the model? If there is any mistake, please let me know. Any suggestion will be greatly appreciated! Thank you.
Best
Jonas