Different Tc obtained in EPW and lambda.x calculation

General discussion around the EPW software

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jisvin
Posts: 1
Joined: Mon May 22, 2023 6:15 am
Affiliation: IISER Tirupati

Different Tc obtained in EPW and lambda.x calculation

Post by jisvin »

Dear Expert users,
The estimated Allen-Dynes Tc using EPW is twice that obtained from Quantum espresso lambda.x calculation. Why is this discrepancy happening? I was solving an isotropic Eliashberg equation.
roxana
Posts: 172
Joined: Fri Jan 22, 2016 6:48 pm
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Re: Different Tc obtained in EPW and lambda.x calculation

Post by roxana »

Hi,

You need to converge lambda with both k and q meshes. This is not very easily done in QE since the k and q meshes used are in general pretty coarse.

Best,
Roxana
Roxana Margine
Associate Professor
Department of Physics, Applied Physics and Astronomy
Binghamton University, State University of New York
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