# Spin-current driven Dzyaloshinskii-Moriya interaction in the multiferroic BiFeO3 from first-principles

**Authors:** Sebastian Meyer, Bin Xu, Matthieu Verstraete, Laurent Bellaiche, Bertrand Dupé  
**arXiv:** [2210.15591](https://arxiv.org/abs/2210.15591)  
**Date:** 2022-10-27  
**Summary page:** https://www.summarizepaper.com/en/paper/2210.15591v1/

## Key points

- Researchers used density functional theory to investigate the origin and strength of the Dzyaloshinskii-Moriya (DM) interaction in multiferroic BiFeO3.
- The DM interaction allows for electrical control of magnons, which can be used to transport and process information in logic devices.
- The data supports only one DM interaction contribution from the spin current model, emphasizing its significance over structural asymmetry induced by anionic octahedron.
- The exchange is isotropic but the DM interaction and anisotropy prefer any propagation and magnetization direction within the full (111) plane.
- By exploring magnon dispersion in the full Brillouin Zone, they showed that this interaction opens up new ways to transport and process information for logic devices.
- This work was supported by grants from organizations such as National Natural Science Foundation of China, DARPA Grant No. HR0011727183-D18AP00010 (TEE Program), European Union’s Horizon 2020 research and innovation programme under Grant Agreements No. 964931 (TSAR), ARO Grant No. W911NF-21-1-0113 and ARO Grant No. W911NF-21-2-0162 (ETHOS).
- Computing time was provided by ARCHER and ARCHER2 based in the United Kingdom at National Supercomputing Service with support from PRACE aisbl, and from Consortium d’Equipements de Calcul Intensif (FRS-FNRS Belgium GA 2.5020.11).
- This study also cited several relevant studies on related topics published in Nature Communications, Journal of Physics C: Solid State Physics, Nature Materials, Physical Review Letters among others.

## Summary

In this study, researchers used density functional theory to investigate the origin and strength of the Dzyaloshinskii-Moriya (DM) interaction in the R3c bulk phase of multiferroic BiFeO3. The DM interaction allows for electrical control of magnons which can be used to transport and process information in logic devices. The data supports only one DM interaction contribution from the spin current model, emphasizing its significance over structural asymmetry induced by anionic octahedron. The exchange is isotropic but the DM interaction and anisotropy prefer any propagation and magnetization direction within the full (111) plane. By exploring magnon dispersion in the full Brillouin Zone, they showed that this interaction opens up new ways to transport and process information for logic devices. This work was supported by grants from organizations such as National Natural Science Foundation of China, DARPA Grant No. HR0011727183-D18AP00010 (TEE Program), European Union’s Horizon 2020 research and innovation programme under Grant Agreements No. 964931 (TSAR), ARO Grant No. W911NF-21-1-0113 and ARO Grant No. W911NF-21-2-0162 (ETHOS). Computing time was provided by ARCHER and ARCHER2 based in the United Kingdom at National Supercomputing Service with support from PRACE aisbl, and from Consortium d’Equipements de Calcul Intensif (FRS-FNRS Belgium GA 2.5020.11). This study also cited several relevant studies on related topics published in Nature Communications, Journal of Physics C: Solid State Physics, Nature Materials, Physical Review Letters among others.