TY  - JOUR
AU  - Redies, Matthias
AU  - Lux, F. R.
AU  - Hanke, J.-P.
AU  - Buhl, P. M.
AU  - Blügel, S.
AU  - Mokrousov, Y.
TI  - Mixed topology ring states for Hall effect and orbital magnetism in skyrmions of Weyl semimetals
JO  - Physical review / B
VL  - 102
IS  - 18
SN  - 2469-9950
CY  - Woodbury, NY
PB  - Inst.
M1  - FZJ-2020-04988
SP  - 184407
PY  - 2020
AB  - As skyrmion lattices are attracting increasing attention owing to their properties driven by real-space topology, properties of magnetic Weyl semimetals with complex k-space topology are moving into the focus of research. We consider Hall transport properties and orbital magnetism of skyrmion lattices imprinted in topological semimetals by employing a minimal model of a mixed Weyl semimetal which, as a function of the magnetization direction, exhibits two Chern insulator phases separated by a Weyl state. We find that while the orbital magnetization is topologically robust and Hall transport properties exhibit a behavior consistent with that expected for the recently discovered chiral Hall effect [F. R. Lux et al., Phys. Rev. Lett. 124, 096602 (2020)], their evolution in the region of the Chern insulator gap is largely determined by the properties of the so-called mixed topology ring states, emerging in domain walls that separate the skyrmion core from the ferromagnetic background. In particular, we show that these localized ring states possess a robust orbital chirality which reverses sign as a function of the skyrmion radius, thereby mediating a smooth switching dynamics of the orbital magnetization. We speculate that while the emergent ring states can possibly play a role in the physics of Majorana states, probing their properties experimentally can provide insights into the details of skyrmionic spin structures.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000587594900006
DO  - DOI:10.1103/PhysRevB.102.184407
UR  - https://juser.fz-juelich.de/record/888524
ER  -