Calculations of the thermal conductivity of KNbO3 from first-principles

In this project we computed the thermal conductivity of three different crystal phases of a ferroelectric perovskite, KNO3. The R3c and the Amm2 are polar phase that are stable at low temperature and room temperature, respectively. The Pm-3m phase is stabilized by photoexcitation (which we effectively simulate with a larger broadening of the Fermi-Dirac distribution, i.e. 0.50 vs 0.01). Each folder contains the files necessary to carry out a thermal conductivity calculations with almaBTE (freely available at https://almabte.bitbucket.io/). The force constants were obtained with the DFT package VASP, as detailed in the related article.