English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT

Released

Journal Article

Signatures of Weyl Fermion Annihilation in a Correlated Kagome Magnet

MPS-Authors
/persons/resource/persons231670

Vir,  Praveen
Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons204916

Thakur,  Gohil S.
Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

/persons/resource/persons126601

Felser,  Claudia
Claudia Felser, Inorganic Chemistry, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

External Resource
No external resources are shared
Fulltext (restricted access)
There are currently no full texts shared for your IP range.
Fulltext (public)
There are no public fulltexts stored in PuRe
Supplementary Material (public)
There is no public supplementary material available
Citation

Belopolski, I., Cochran, T. A., Liu, X., Cheng, Z.-J., Yang, X. P., Guguchia, Z., et al. (2021). Signatures of Weyl Fermion Annihilation in a Correlated Kagome Magnet. Physical Review Letters, 127: 256403, pp. 1-7. doi:10.1103/PhysRevLett.127.256403.


Cite as: https://hdl.handle.net/21.11116/0000-0009-F4FA-A
Abstract
The manipulation of topological states in quantum matter is an essential pursuit of fundamental physics and next-generation quantum technology. Here we report the magnetic manipulation of Weyl fermions in the kagome spin-orbit semimetal Co3Sn2S2, observed by high-resolution photoemission spectroscopy. We demonstrate the exchange collapse of spin-orbit-gapped ferromagnetic Weyl loops into paramagnetic Dirac loops under suppression of the magnetic order. We further observe that topological Fermi arcs disappear in the paramagnetic phase, suggesting the annihilation of exchange-split Weyl points. Our findings indicate that magnetic exchange collapse naturally drives Weyl fermion annihilation, opening new opportunities for engineering topology under correlated order parameters. © 2021 American Physical Society.