Tag Archives: boron nitride

Direct and indirect excitons in boron nitride polymorphs: a story of atomic configurations and electronic correlation

In this work we study how different atomic configurations, and electronic correlation modify the exciton dispersion in hexagonal boron nitride. We use two different approaches, ab-initio DFT plus many-body perturbation theory and tight-binding. We found that in the case of AB-stacking electronic correlation inverts the nature of the optical gap, from indirect to direct respect… Read More

Drawing nanostructures with povray

  Sometime ago I discovered povray, a ray tracing program which generates stunning three-dimensional graphics. I used it to draw nanostructures and in particular nanotubes in different configurations, hereafter the plots and the corresponding scripts: From left to right: 1) illuminated nanotube, STM_tips.pov 2) gated nanotube, gated_tube.pov 3) nanotube and STM tip, light_tube.pov

Efficient Gate-tunable light-emitting device made of defective boron nitride nanotubes

I published my first “Nature”, even if the lower level one, a Nature Scientific Reports: Efficient Gate-tunable light-emitting device made of defective boron nitride nanotubes: from ultraviolet to the visible Claudio Attaccalite, Ludger Wirtz, Andrea Marini & Angel Rubio Scientific Reports 3, Article number:2698 Boron nitride is a promising material for nanotechnology applications due to… Read More