[Pw_forum] Dipole moment in presence of an external finite electric field

[Barnali Bhattacharya]

Dear Sir/Madam

I am a Quantum espresso user and trying to get the variation of dipole
moment with respect to external electric field for bilayer system.

For this I have set in the input

  lelfield = .true.,
    nberrycyc= 1,

    efield_cart(1) = 0.000,
    efield_cart(2) = 0.000,
    efield_cart(3) = 0.10,














*In the output file, it has provided  Electronic Dipole per cell (Ry
a.u.)   6.28189139063565          Ionic Dipole per cell (Ry a.u.)
1197.26939418139     Electronic Dipole on Cartesian axes           1
0.626129513138514                2 -0.542787347959932                3
  6.28189139063565     Ionic Dipole on Cartesian axes           1
631.165105699794                2   364.667080337645                3
 1197.26939418139  *

>From this information how can I get *elecric dipole moment*.

Could you please guide me to get the dipole moment? Any help will be
thankfully acknowledged.

I am waiting for any suggestion.

Thanking you.


Sincerely

Barnali Bhattacharya

Ph.D student, Department of Physics
Assam Universit
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