electron phonon coefficient in insulator

[Newbie123]

Dear EPW users,

Sorry for basic quastion.

I read quantum espresso document. They said
"7.7 HOW CAN I CALCULATE THE ELECTRON-PHONON COEFFICIENTS IN INSULATORS?
You cannot: the current implementation is for metals only."
https://www.quantum-espresso.org/faq/faq-phonons/#7.3

Does it means that epw can't also calcultae electron-phonon coefficients in insulators?

Before I read the precaution, I calculated chiral Tellurium with "occupations = 'fixed' " in quantum espresso. And I got the electron-phonon coefficients of chiral tellurium using EPW code. Is the electron-phonon coefficients wrong? (chiral tellurium is semiconductor, but my point is "can we calculate electron phonon coefficients in insulators)

sincerly,
HC Kyung

[stiwari]

Hi,

EPW can calculate the electron-phonon interactions in all kinds of materials (of course including insulators). Therefore, it is perfectly fine to keep occupations=fixed and then use EPW to calculate the electron-phonon matrix elements.

Best regards,
Sabya.

[Newbie123]

Dear Sabya,

Thanks a lot!

Best regards,
HC Kyung