Chiral electronic excitations and strong electron-phonon coupling to Weyl fermions in the kagome semimetal <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:msub> <mml:mi>Co</mml:mi> <mml:mn>3</mml:mn> </mml:msub> <mml:msub> <

Near a Weyl point, spin-momentum locking forces opposite spin orientations above and below the node. When a Weyl point lies near the Fermi surface, electrons can scatter across it only by flipping spin, thereby breaking time-reversal symmetry. This process appears exclusively in the antisymmetric $A$${}_{2g}$ Raman channel. The authors observe here enhanced $A$${}_{2g}$ intensity below the ferromagnetic transition of Co${}_{3}$Sn${}_{2}$S${}_{2}$, providing strong evidence for Weyl points. Furthermore, the calculated resonant $A$${}_{2g}$ response shows qualitative agreement with experiment.

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Publication Details

Journal
Physical review. B./Physical review. B
Published
2025-11-04
DOI
https://doi.org/10.1103/wkzr-vfgn
Citations
1
Primary Topic
Topological Materials and Phenomena
Type
article
Field-Weighted Citation Impact
1.25
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article

Chiral electronic excitations and strong electron-phonon coupling to Weyl fermions in the kagome semimetal <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:msub> <mml:mi>Co</mml:mi> <mml:mn>3</mml:mn> </mml:msub> <mml:msub> <

R. Hackl, Daniel Jost, Thomas Devereaux, Emily Been et al.
1 citations
Physical review. B./Physical review. B
Topological Materials and Phenomena
1.25
article

Chiral electronic excitations and strong electron-phonon coupling to Weyl fermions in the kagome semimetal <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:msub> <mml:mi>Co</mml:mi> <mml:mn>3</mml:mn> </mml:msub> <mml:msub> <

R. Hackl, Daniel Jost, Thomas Devereaux, Emily Been, Ge He, Andreas Baum, Zhongchen Xu, Malhar Kute, Brian Moritz, Leander Peis, Jun Shen, Youguo Shi, Ramona Stumberger
article en
1 citations

Abstract

Near a Weyl point, spin-momentum locking forces opposite spin orientations above and below the node. When a Weyl point lies near the Fermi surface, electrons can scatter across it only by flipping spin, thereby breaking time-reversal symmetry. This process appears exclusively in the antisymmetric $A$${}_{2g}$ Raman channel. The authors observe here enhanced $A$${}_{2g}$ intensity below the ferromagnetic transition of Co${}_{3}$Sn${}_{2}$S${}_{2}$, providing strong evidence for Weyl points. Furthermore, the calculated resonant $A$${}_{2g}$ response shows qualitative agreement with experiment.

Physical review. B./Physical review. BVol. 112(21)
Bavarian Academy of Sciences and Humanities (DE), Beijing Institute of Technology (CN), University of California, Los Angeles (US), Chinese Academy of Sciences (CN), University College Cork (IE), SLAC National Accelerator Laboratory (US), Leibniz Institute for Solid State and Materials Research (DE), Songshan Lake Materials Laboratory (CN), Institute of Physics (CN), University of Chinese Academy of Sciences (CN), Technical University of Munich (DE), Stanford University (US)
Openalex Percentile: Top 15%
Topological Materials and Phenomena
1.25
DOISourceOpenAlex
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