Since I’m in France, I submitted different projects to the ANR and other funding agencies, and I must say, with little success. In this post I decided to publish and share some of these projects that have not been accepted. I hope they could serve as a model to other researchers, or perhaps as an… Read More
We pubblised a new paper1 on the optical properties of Cu-chalcogenide photovoltaic absorbers. In this manuscript we calculate the optical response of the less studied, but promising, Cu2ZnGe(S,Se)4 compounds, opening the way to predictive calculations of still unknown materials by means of self-consistent GW plus Bethe-Salpeter equations. Moreover in this paper we solved the problem… Read More
We published a new paper on the second harmonic generation(SHG) in two-dimensional hexagonal crystals SiC, ZnO and GaN. The SHG is calculated within the so called GW plus Bethe-Salpter formalism, using a real-time implementation proposed by some of us. We found that these system present a large region with a strong SHG before the absorption… Read More
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
After the discover of graphene in 2014 by Geim and Novoselov that got the Nobel price in 2010, scientists have worked hard to investigate all possible properties and possible uses of this material. At the beginning graphene was proposed as possible candidate to substitute silicon in electronics, due its extreme high conductivity. However differently from… Read More
Dear Friends and Colleagues, in the occasion of Giovanni Bachelet’s 60th birthday, you are warmly invited to the workshop “Computer Simulations for condensed phase systems: from correlated electrons to novel materials” to be held at the CNR Headquarters in Rome, on May 4-6, 2015. The talks, on invitation only, will be given by… Read More
CNRS (National Scientific Research Center) is the largest research center in France. It employes about 11.000 researchers and its domain of activity ranges from physics to sociology, from chemistry to electronics and so on. Every year researchers are recruited by means of a national open competitive exam. The selection is composed of two parts a… Read More
Thanks to Francesco Sottile the video of my presentation at the “Correlation Meeting 2014” is online. In this talk I explain how GW can be used to correct the electron-phonon matrix elements, and improve the agreement with the experiments as Raman, phonons, band gap renormalization, superconductivity, etc…
New poster on second and third harmonic generation in nanostructures. We studied SHG in two-dimensional crystals and THG in one dimensional nano-ribbons and nanotubes.
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