to calculate excited states and response properties from first-principles based on many-body theory
Convergence of dielectric constant with respect the number of k-points can be very slow in many systems. For this reason in Lumen it is implemented a double-grid technique that speeds up convergence versus k-points with a computational cost comparable to the standard calculations. Here we provide a tutorial for this approach: https://www.lumen-code.org/wiki/index.php?title=Fast_convergence_of_dielectric_constant_with_double_grid The method for…
A new tutorial on calculating shift current (SC) using Lumencode is now available online.In this tutorial, we present our real-time approach to obtaining the SC response and provide an example involving a monolayer GeS. The role of excitons in the SC response can also be taken into account using our approach. Tutorial is available here…
All Lumen tutorials are now online in the wiki webpage: https://www.lumen-code.org/wiki/index.php?title=Tutorials notice that some inputs are slightly different from the Yambo ones because we are making an effort to simplify them and make them more accessible to new users.