Complex magnetism of B20-MnGe: from spin-spirals, hedgehogs to monopoles

Abstract

B20 compounds are the playground for various non-trivial magnetic textures such as skyrmions, which are topologically protected states. Recent measurements on B20-MnGe indicate no clear consensus on its magnetic behavior, which is characterized by the presence of either spin-spirals or 3-dimensional objects interpreted to be a cubic lattice of hedgehogs and anti-hedgehogs. Utilizing a massively parallel linear scaling all-electron density functional algorithm, we find from full first-principles simulations on cells containing thousands of atoms that upon increase of the compound volume, the state with lowest energy switches across different magnetic phases: ferromagnetic, spin-spiral, hedgehog and monopole.

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Cited by in corpus (9)

• Topological-chiral magnetic interactions driven by emergent orbital magnetism
• Atomic scale visualization of topological spin textures in the chiral magnet MnGe
• Short period magnetization texture of B20-MnGe explained by thermally fluctuating local moments
• Multiple-scattering approach for multi-spin chiral magnetic interactions: Application to the one- and two-dimensional Rashba electron gas
• Electronic scattering off a magnetic hopfion
• Topological magnetic structures in MnGe: Neutron diffraction and symmetry analysis
• Theory of collective excitations in the quadruple-$Q$ magnetic hedgehog lattices
• Eightfold Degenerate Dirac Nodal Line in Collinear Antiferromagnet Mn${}_5$Si${}_3$
• General spin models from noncollinear spin density functional theory and spin-cluster expansion