Since I do not use so often BLAS library for matrix-matrix multiplication, when I have to multiply two matrices with some rectangular shape or with additional operation I always get confused. So I decided to write a simple guide to c/z-gemm in fortran. 1) Simplest case two square complex matrices: A(N,N) and B(N,N) and I… Read More
I searched on internet for different solution, then I found one pleasant for my website. First of all I modified the style.css file to define a nice list in HTML. #MyList { margin-bottom: 20px; } the I added the following PHP code in front-page.php: <center><h2><font color=#051A23>RECENT POSTS … </font></h2> <br> <ul id=”MyList”> <?php query_posts(‘showposts=3’);… Read More
Computer simulations for condensed phase systems From correlated electrons to novel materials – Rome, 3-5th May 2015 The workshop “Computer Simulations for condensed phase systems: from correlated electrons to novel materials” will be held at the university of Rome, la Sapienza, on May 3-5 2015. This workshop is meant to celebrate Giovanni Bachelet’s 60th birthday… Read More
19th ETSF Workshop on Electronic Excitations: Complex systems in Biology and Nanoscience I’m one of the organizer of the workshop “19th ETSF Workshop on Electronic Excitations: Complex systems in Biology and Nanoscience” that will be held in Zaragoza (Spain) from Septembre 23th to Septembre 26th.
I’m one of the organizer of the workshop “Gutzwiller wave functions and related methods” that will be held in Valance (France) from June 16th to June 19th. Here the French announcement, and conference web-page.
We just published a new review on GW and Bethe-Salpeter (BSE) for molecules. In the review we discuss electronic excitations both in TDDFT and in the Green’s function approach. The successes and failures of the different methods are presented. In particular we focused on charge-transfer excitations for which the photoexcited electron and the hole left… Read More
Together with Myrta Gruning we just submitted a new paper on second harmonic generation(SHG) in two-dimensional materials, h-BN and MoS2. We calculated the SHG using a real-time approach that we recently developed. We included both local field effects and electron-hole interaction at the level of screened exchange , without any additional approximation. Our approch is… Read More
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
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
We present an ab-initio real-time based computational approach to nonlinear optical properties in Condensed Matter systems[1]. The equation of motions, and in particular the coupling of the electrons with the external electric field, are derived from the Berry phase formulation of the dynamical polarization.[2] The zero-field Hamiltonian includes crystal local field effects and the renormalization… Read More