hello dear all I am working on piezoelectricity properties of materials I runed example 10 in quantum espresso but i am not Purpose of some parameters in input and output files. I get the value of born effective charge (for the all atoms PbTio3). 1-what is the meaning of the berry phase in output of PbTio3? 2-Can i get components of berry phase related to piezoelectric constant? what i put in input of PbTiO3?
HAMID HASSANZADEH M.Sc STUDENT OF Iran
