This is a collection of input and output files that were used to produce all the data reported 
 in the following publication:

 Tommaso Gorni, Oscar Baseggio, Pietro Delugas, Iurii Timrov, and Stefano Baroni,
 "First-principles study of 1 the gap in the spin excitation spectrum of the CrI3 honeycomb ferromagnet",
 accepted to Phys. Rev. B Letter, arXiv:2212.09516

 Calculations were performed using the open-source Quantum ESPRESSO distribution
 which can be downloaded from www.quantum-espresso.org.

 The following codes of Quantum ESPRESSO were used:
 pw.x             - the code that performs ground-state DFT calculations 
 turbo_magnon.x   - the code to compute magnons using TDDFPT
 turbo_spectrum.x - the post-processing program to plot the magnetic spectra

 DESCRIPTION OF FOLDERS:

 - DFT: input and ouput files for the DFT ground-state calculation

 - TDDFT: input and ouput files for the TDDFT calculations of magnons

 - Fitting_k_cones: scripts to perform the fitting of cones around the K point