polarization and born effective charge
Posted: Sat Feb 05, 2011 2:43 pm
Hello,
i wana to use polarization calculated by berry phase to calculate born effective charge.i have studied tutorial on polarization and in that tutorial it has used
z=omega_0{pol(tau=0.01)-pol(tau=-0.01)}/2*tau.could you please explain about omega?is the unit of born effective charge coulomb?
Best wishes.
i wana to use polarization calculated by berry phase to calculate born effective charge.i have studied tutorial on polarization and in that tutorial it has used
z=omega_0{pol(tau=0.01)-pol(tau=-0.01)}/2*tau.could you please explain about omega?is the unit of born effective charge coulomb?
Best wishes.