Category Archives: electron-phonon coupling

New poster on GW renormalization of the electron-phonon interaction

Here my new poster that I will present to the PSI-K conference on the GW renormalization of the electron-phonon interaction. In this poster I summarize results from different group that used GW approximation to correct the electron-phonon coupling obtained from the Kohn-Sham Hamiltonian. Thanks to these corrections it was possible to reproduce and predict different… Read More

Exploring approximations to the GW self-energy ionic gradients

A new paper is out on the different approximation in  GW  for the electron-phonon couping matrix elements. In particular we tested two approximation the static screening (COHSEX) and the constant screening respect to the phonon displacement. We found that the first approximation miserably fails to reproduce the G0W0 results while the second introduce a negligible… Read More

GW renormalization of the electron-phonon coupling

My new presentation on the “GW renormalization of the electron-phonon coupling” is available online. This is the talk I gave to the “Correlation Meeting 2014” organized by Pina Romaniello. In this presentation I show that GW corrections are important not only for band structure and energy levels but they also renormalise the electron-phonon matrix elements…. Read More