[QE-users] Renormalized band energies from the postahc.x code

[Vahid Askarpour]

Hi Lorenzo,

Just to clarify, by the renormalized ones you are referring to the EPI-renormalized electronic band structure (which is what I am after)?

Thanks,
Vahid

On Apr 13, 2026, at 12:57 PM, Lorenzo Paulatto <lorenzo.paulatto at cnrs.fr> wrote:

CAUTION: The Sender of this email is not from within Dalhousie.

I am attempting to compare PbTe band structure at 0K and 300K using the postahc.x code. The code does print the renormalized self-energies (Example 19 in the PHONON package) but does it store the EPI-renormalized band energies anywhere?

I'm not familiar with this code, but it should be enough to add the imaginary part of the self-energy (which is usually negative) to the unperturbed phonon frequency to get the renormalized one.

hth



Thanks,
Vahid

Vahid Askarpour
Department of Physics and Atmospheric Science
Dalhousie University
Halifax, NS, CANADA
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