A new tutorial on exciton-phonon coupling in Yambo is available. In this tutorial we will show how to generate exciton-phonon matrix elements and calculate phonon-assisted absorption and emission. In the last part of the tutorial the exciton-phonon matrix elements will be used to calculate exciton life-time. The tutorial is based on a preliminary version of… Read More
In this talk I will discuss luminescence of mono-layer hexagonal boron nitride, taking into account exciton-phonon coupling and the role of substrate. Results are compared with recent experimental measurements.Here the ODP file.
Cette année, j’ai enfin réussi le concours de directeur de recherche du CNRS en section 3, après six tentatives.Dans cet article, je souhaite partager les différents projets de recherche et présentations que j’ai utilisés au fil des années, en espérant qu’ils puissent être utiles à d’autres candidats. Presentations: Electronic and optical properties of nano-materials (2023)… Read More
Hybrid van der Waals heterostructures made of 2D materials and organic molecules exploit the high sensitivity of 2D materials to all interfacial modifications and the inherent versatility of the organic compounds. In this study, we are interested in the quinoidal zwitterion/MoS2 hybrid system in which organic crystals are grown by epitaxy on the MoS2 surface… Read More
In this new work we study luminescence in monolayer hexagonal boron nitride (m-hBN) using a new ab-initio approach that takes into account the effects of atomic vibrations on the luminescence spectra. We construct the dynamical exciton-phonon self-energy, then use it to perturbatively correct the optical response functions and test this approach on bulk hBN as… Read More
In this seminar I present new thoeretical and exparimental results on hexagonal-boron nitride under isotropic pressure and uni-axial strain. In particalar we focused on the changes in the optical response both absortion and emission. We show how exicton behave under these extreme conditions.The presentation can You can downloaded here: A squashed and squeezed h-BN [ODP]
On-surface chemistry is a promising topic in nanoscience and is widely applied for the generation of a multitude of nanostructures and to the local chemical modification of adsorbed molecules in order to tune their properties or create layers with new functionalities. Using an electric field to control chemical reactions is a concept that has been… Read More
The “Computational School on Electronic Excitations in Novel Materials Using the Yambo Code” school at the ICTP has just ended. In this school we presented an introduction to many-body theory, a new version of the code that include all the non-linear response part. The new tutorials that are available in the wiki webpage. Moreover all… Read More
The Computational School on Electronic Excitations in Novel Materials Using the Yambo Code, introduces participants to post-DFT simulations, in particular many-body perturbation theory (MBPT) approaches and provide training in the calculation of electronic and optical properties of materials. The program will offer theoretical and technical lectures, as well as dedicated hands-on sessions where the students… Read More
I was invited to give a seminar at the conference of young Italian researchers. At this conference I will present a talk on the story of academic publishing. I will briflely present the story of academic publising, from the first journals to the modern publication system, passing through open access, impact factor, etc… I show… Read More