First-principles study of oxide skyrmion crystal Chern insulator

The magnetic skyrmion crystal (SkX), formed by a topological vortex-like spin in condensed matter, has attracted considerable attention in last decade. We performed density functional calculations for SkX in electron-doped EuO monolayer and found Chern insulating ground state where Chern number C=2[1]. Calculated large anomalous Nernst effect [1,2] and electric-field effect will be discussed.
[1] Y. P. Mizuta, H. Sawahata, and F. Ishii, "Large anomalous Nernst coefficient in an oxide skyrmion crystal Chern insulator", Phys. Rev. B, in press. arXiv:1803.08148.
[2] Y. P. Mizuta, and F. Ishii, "Large anomalous Nernst effect in a skyrmion crystal", Sci. Rep. 6, 28076 (2016).