ТЕОРЕТИЧЕСКОЕ ИССЛЕДОВАНИЕ МАГНОННЫХ СПЕКТРОВ МОНОСЛОЯ ТРИЙОДИДА ХРОМА

Abstract

The magnetic properties of CrI3 monolayer, considered by means of magnon spectra, are the prime focus of this work. Using first-principles calculations and microscopic model tech-niques, we found that ferromagnetism of the system cannot be exhaustively described only by effective nearest-neighbour (1NN) isotropic exchange interactions. Accounting for longer ranged couplings, accomplished in terms of magnetic force theorem, yields distinct peaks in the magnon spectra, which are absent in the case of 1NN model. It highlights the comprehen-sive theoretical investigation to be the only tool to reveal the mechanisms, lying behind the CrI3 monolayer ferromagnetism.