Tag: GEO_OPT

Unreal cell parameters obtained after CELL_OPT

Dear all, I have been trying to optimize a unit cell of the 2D semiconductor CrSBr using GPW method implemented in CP2K. The initial cell parameters were a = 3.6 A, b = 4.8 A and c = 25.0 A (obtained from previous calculations with Quantum Espresso and in good…

Continue Reading Unreal cell parameters obtained after CELL_OPT

Getting CP2K to print the COLVAR info

Getting CP2K to print the COLVAR info – Matter Modeling Stack Exchange …

Continue Reading Getting CP2K to print the COLVAR info

Improving convergence for bulk Iron (bcc Fe)

Dear CP2K users, I’m struggling with convergence for bulk Fe, i.e. 3x3x3 supercell containing 54 Fe atoms. I wanted to simulate adsorption of different organic molecules on Fe(100) slab later, so this is my starting point. During GEO_OPT or CELL_OPT runs I sporadically encounter SCF issues like this: …    33 Broy./Diag….

Continue Reading Improving convergence for bulk Iron (bcc Fe)

howto:geometry_optimisation [CP2K Open Source Molecular Dynamics ] (2022)

Introduction This tutorial is designed to illustrate how to relax the structureof a system (without changing the cell dimensions) using CP2K. Weuse the relaxation of a water (H\(_2\)O) molecule as an example. The example files are contained in geometry_optimisation.tgz that comes with this tutorial. The calculation was carried out with…

Continue Reading howto:geometry_optimisation [CP2K Open Source Molecular Dynamics ] (2022)

MXene TI2CO2 monolayer GEO_OPT gets stuck

Hello All, I created a Ti2CO2 monolayer (MXene)  that I will attach as an xyz file. I want to run GEO_OPT on this structure with periodic boundary conditions only in the XY directions. In my output RESULTS file  the first SCF converges in 106 steps, but then the file is…

Continue Reading MXene TI2CO2 monolayer GEO_OPT gets stuck