I just read paper "Dispersion of the second harmonic generation from CdGa2X4 (X = S, Se)
defect chalcopyrite: DFT calculations" A.H. Reshak - DOI 10.1016/j.jallcom.2013.12.267
I have one question, package ATAT@WIEN2k can calculate second harmonic generation? If have, could tell me how to install and calculate this. Need something tutorial as ElaStic@WIEN2k.
Tuan Vu - PhD student.