Ciao Agnes,
How are you? Hope you are doing well,
I am writing my PhD thesis, and I would like to include the piezoelectric effect of BaTiO3.
In the published paper, you report the effect of hamiltonain for Rohmbohedral phase, but I am interested in the contribution of both electronic and vibrational parts to piezo and elastic properties for the three ferroelectric phases saying with PBE0 hamiltonian.
If you did these calculations, can you send me please the output files, or even put them on the dropbox, many thanks.
Best regards,
Khaled