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 three-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.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Aug 27, 2019
- Source ID
- 10.1088/1361-648x/ab38a0
Entities
People
- Manuel Dos Santos Dias
- Marcel Bornemann
- Paul F. Baumeister
- Rudolf Zeller
- Samir Lounis
- Sergii Grytsiuk
- Stefan Blügel
Organizations
- Defense Advanced Research Projects Agency
- Gauss Centre for Supercomputing
- German Research Foundation