I participate to the research group GDR REST (REncontres de Spectroscopie Theorique). Our project aims to bring together different communities of theoretical spectroscopy in order to establish the state-of-the-art approaches on the market, share knowledge, identify important issues and unresolved problems, and indicate future directions.There are several approaches to the study of elementary excitations, the… Read More
This year I organize the “NonLinear Optics of Materials and Nanoplasmonics Symposia” at the PSI-K conference in San Sebastian, together with Myrta Grüning and Valerie Veniard. We selected the following people as invited speakers: Stefano Corni, FJ Vidal and Pablo García, Alberto Castro, Stefano Ossicini and Kazuhiro Yabana. I invite all people interested in non-linear optics… Read More
I have to make a simple calculation with NWChem, so I downloaded it and tried to install on my notebook, here my impressions. The first impression of NWChen is not so good, they use their own installation precedure, that often fails, I really do not understand why they don’t use the standard Autoconf . At… Read More
In 2009 I passed the CNRS competition for a research position in section 3, condensed matter theory. Since that year many friends of mine asked me a copy of my scientific research project and the slides of the presentation. Now I decided to make them available online, in such a way to help people that… Read More
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