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<div>Dear QE users,<span></span></div><div><br></div><div>I am studying on the phonon spectrum of a semiconductor surface which exhibits strong polarity. For polar materials, we can apply a dipole correction via setting the 'tefield' and 'dipfield' options in the scf calculation. However, I notice that, the option 'assume_isolated=2D' is needed to calclate the phonon spectrum for 2D materials. It functions via truncation of the Coulomb interaction in the z direction. I don't know whether the dipole correction should also be applied in this case. How should I set these options when calclating the phonon spectrum for 2D polar materials?</div><div>Thanks a lot.</div><div><br></div><div>------------</div><div>Best regards,</div><div>Yonggang Xu</div>
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