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- W4225750221 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 Co$_3$Sn$_2$S$_2$, 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." @default.
- W4225750221 created "2022-05-05" @default.
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- W4225750221 date "2021-12-17" @default.
- W4225750221 modified "2023-10-18" @default.
- W4225750221 title "Signatures of Weyl Fermion Annihilation in a Correlated Kagome Magnet" @default.
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- W4225750221 doi "https://doi.org/10.1103/physrevlett.127.256403" @default.
- W4225750221 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/35029418" @default.
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