21 citations · 23 across the 4 of their papers we have counts for
6 papers · 1 filter
Radiative lifetime of free excitons in hexagonal boron nitride
Sébastien Roux, Christophe Arnold, Fulvio Paleari +12
Using a new time-resolved cathodoluminescence system dedicated to the UV spectral range, we present a first estimate of the radiative lifetime of free excitons in hBN at room tempe…
Proper ab-initio dielectric function of 2D materials and their polarizable thickness
Lorenzo Sponza, François Ducastelle
In this paper we derive a formalism allowing us to separate inter-layer contributions to the polarizability of a periodic array of 2D materials from intra-layer ones. To this aim,…
The impact of stress on the electronic structure of phosphorus allotropes stacked on hexagonal boron nitride
Baptiste Bienvenu, Hakim Amara, François Ducastelle +1
We study the mechanical and electronic properties of heterobilayers composed of black phosphorus (BP) on hexagonal boron nitride (hBN) and of blue phosphorus (\Pblue) on hBN by mea…
Direct and indirect excitons in boron nitride polymorphs: a story of atomic configuration and electronic correlation
Lorenzo Sponza, Hakim Amara, Claudio Attaccalite +5
We compute and discuss the electronic band structure and excitonic dispersion of hexagonal boron nitride (hBN) in the single layer configuration and in three bulk polymorphs (usual…
Bright luminescence from indirect and strongly bound excitons in hBN
Leonard Schue, Lorenzo Sponza, Alexandre Plaud +6
A quantitative analysis of the excitonic luminescence efficiency in hexagonal boron nitride (hBN) is carried out by cathodoluminescence in the ultraviolet range and compared with z…
Confinement effects in ultra-thin ZnO polymorph films: electronic and optical properties
Lorenzo Sponza, Jacek Goniakowski, Claudine Noguera
Relying on generalized-gradient and hybrid first-principles simulations, this work provides a complete characterization of the electronic properties of ZnO ultra-thin films, cut al…