how can we determine polarization?

[rmbarki]

Hello,
I was checking the forum to find a way to determine the polarization of piezoelectric material but didnt find it, so is there anyone who knows how to do it.

Thanks

Raouf Mbarki

[Anders Blom]

Berry phase calculations are not yet implemented in ATK, I'm afraid.

[zh]

The polarization of piezoelectric materials can be calculated using other free codes such Quantum-espresso and ABINIT, in which the linear response method (or perturbation density functional theory) is implemented.  You can check the manual of these two codes.