Category Archives: software

Yambo input file for GW calculations explained

Example of a yambo input file for GW calculation in a solid. In order to generate the following input file you can use the command “yambo -g n -p p -V par” with yambo 4.0.2 (and with yambo 3.4.2  “yambo -g n -p p”).   gw0 # [R GW] GoWo Quasiparticle energy levels ppa #… Read More

Reasonable parameters for Yambo calculations

Here I report some advices to choose reasonable parameters in order to converge different kind of calculations with the Yambo code. The following parameters are a reasonable recommendation. However you have to remember that convergence can be different from system to system, so you should check your calculations and not use the following parameters blindly…. Read More

Quantum Espresso and Yambo input files

This is my small collection of Quantum Espresso (PWSCF) and Yambo input files that I used in my papers or for different testing purposes. I cannot give any warranty whatsoever these files are correct and fit your actual needs. Carbon nanotubes: 7×7, 4×2, 10×10, 1×10 Carbon nanoribbons: ANGR7 Diamond Donor Acceptor Complexes from ref. Appl. Phys. Lett…. Read More

How to plot the Dipole Moment calculated by NWCHEM with XCrysDen

Dipole moment of molecules is an interesting physical quantity that can be directly measured in experiments and easily calculated by means of Density Functional Theory. Moreover the size of dipole moment is related to many other properties as for instance light emission in polar liquid, packing of molecules in solid phase. With NWChem it can… Read More

How to transform a CIF file in a QuantumEspresso input

When you work with experimentalists, often you have to deal with atomic structures reconstructed from x-ray scattering in the format of CIF files. Here I briefly explain how to transform these files in a QuantumEspresso input using Mercury code. Open the CIF file with Mercury then follow the points below: 1) remove the duplicated atoms, … Read More

Developing Yambo tutorial is available online

My new tutorial on “Developing Yambo” is available online. This was possible thanks to the work of Myrta Gruning and Davide Sangalli that updated the tutorial to the last version of the code and completed some unfinished parts.  In this tutorial we explain how to introduce new functionalities in the Yambo code. As example, inspired… Read More

Self-consistent GW on eigenvalues only with the Yambo code

For molecules and also for molecular solids, the G0W0 approach often gives poor results. The main reason of this failure is  the DFT  starting point. In fact local or semi-local exchange correlation functionals give a too small gap compared with the experimental one, and a single shot GW is not able to correct this error…. Read More

FIESTA: French Initiative for Electronic Simulations with Thousands of Atoms

My new poster for the GBB60 conference is online, FIESTA: French Initiative for Electronic Simulations with Thousands of Atoms. The poster is about a GW and Bethe-Salpeter code developed in Grenoble that uses Gaussian bases and resolution-of-the-identity techniques. For more info in the code see the Fiesta web page: See you in Rome.