# Category Archives: yambo

# Virtual school on electronic excitations in solids and nanostructures using the Yambo code

The Yambo Team is pleased to announce the: Virtual school on “Electronic excitations in solids and nanostructures using the Yambo code” The MaX/CECAM virtual school will last four days and will be held on April 8, 9 (week 1) and April 15, 16 (week 2) 2021 using the online platform Zoom. The school aims to introduce… Read More

# Yambo Developers’ meeting 2020

This year the Yambo Developers’ meeting will be online. In the morning of Friday 4, 11 and 18 December. It will be the occasion to discuss new developments and recent achievement with the Yambo code. Topics will range from: accelerating calculations in 2D systems, to Yambo-Aiida interface, validation of the code, robots, python postprocessing etc….. Read More

# Yambo school 2020: new video lectures and tutorials are online

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

# Computational School on Electronic Excitations in Novel Materials Using the Yambo Code

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

# Many-body perturbation theory calculations using the Yambo code

Yambo is an open source project aimed at studying excited state properties of condensed matter systems from first principles using many-body methods. As input, yambo requires ground state electronic structure data as computed by density functional theory codes such as Quantum-Espresso and Abinit.Yambo’s capabilities include the calculation of linear response quantities (both independent-particle and including… Read More

# GW correction on an arbitrary point of the Brillouin zone with Yambo

Here I show how to calculate GW correction for a generic k-point not included in the original grid used to perform a GW calculations using Yambo 4.2. This method allows to obtain the GW correction without the need of recalculate the full dielectric constant used in the initial calculation. As example I will take 2-dimensional… Read More

# Speed up dielectric constant calculations using the double-grid method with Yambo

Convergence of dielectric constant with respect the number of k-points can be very slow in many systems. For this reason in Yambo it is implemented a double-grid technique that speeds up convergence versus k-points with a computational cost comparable to the standard calculations. The method is described in the paper: Speeding up the solution of… Read More

# RPA calculations with Yambo for large systems

Performing RPA calculations with yambo in large systems can be a problem due to the memory requirement. In fact the code does not distribute the dielectric constant at the different frequencies among the processors. The solution is to run different calculations for each frequency of the dielectric constant and then joind the outputs. Here my… Read More

# Yambo input file for BSE calculations explained

Here I present the BSE input file for yambo and I will discuss the meaning of each parameter. For a discussion on convergence issues see my post: Reasonable parameters for Yambo calculations. To generate this input type yambo -o b -k sex -y d -p p -V qp. I will not discuss the parameters relative… Read More