Re: [Pw_forum] How to calculate piezoelectric constants

2015-07-07 Thread stefano de gironcoli
It used to be coded as post processing of the Phonon code but not any more. It should be possible to compute the change in macroscopic polarization induced by a deformation by the Berry phase approach. Or calculate the stress induced by a finite electric field [see e.g. Umari, Pasquarello PRL

Re: [Pw_forum] How to calculate piezoelectric constants

2015-07-07 Thread Mojtaba Mirseraji
Dear ESPRESSO users and developers I want to know how to calculate piezoelectric constants (d33, d31, d15, ...) ! Do you have any good paper that explain them step by step and easily? Regards Mojtaba Mirseraji Ph.D. Candidate Physics Department Arak Univ. I.R.IRAN On 6/23/15, Mojtaba Mirseraji

[Pw_forum] How to calculate piezoelectric constants

2015-06-23 Thread Mojtaba Mirseraji
Dear ESPRESSO users and developers I want to know how to calculate piezoelectric constants (d33, d31, d15, ...) ! Do you have any good paper that explain them step by step and easily? Regards Mojtaba Mirseraji Ph.D. Candidate Physics Department Arak Univ. I.R.IRAN