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| Main Authors: | , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2504.04590 |
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| _version_ | 1866912312897568768 |
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| author | Ghosh, Shreenanda Lygouras, Chris Feng, Zili Fu, Mingxuan Nakatsuji, Satoru Drichko, Natalia |
| author_facet | Ghosh, Shreenanda Lygouras, Chris Feng, Zili Fu, Mingxuan Nakatsuji, Satoru Drichko, Natalia |
| contents | Weyl semimetals are characterized by an electronic structure with linearly dispersed nodes and distinguished chirality, protected by broken inversion or time reversal symmetry. The intercalated transition metal dichalcogenide V$_{1/3}$NbS$_2$ is proposed as a Weyl semimetal. In this study, we report polarization-resolved magnetic and electronic Raman scattering of this material, probing both the magnetic order and the electronic structure. The electronic scattering reveals a linear with frequency continuum of excitations, as the signature of electronic transitions within the proposed Weyl nodes in a two-dimensional electronic structure. Additionally, two-magnon excitations of V moments are observed near 15 meV in the magnetically ordered phase below 50 K. These excitations are well reproduced by calculations based on the Fleury-Loudon theory using spin wave exchange parameters derived from the neutron scattering data of this material and confirm the antiferromagnetic character of the order. These magnetic and electronic scattering, observed in the same spectra, provide independent spectroscopic evidence for a collinear antiferromagnetic Weyl semimetal state in V$_{1/3}$NbS$_2$. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2504_04590 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Raman spectroscopic evidence for linearly dispersed nodes and magnetic ordering in the topological semimetal V$_{1/3}$NbS$_2$ Ghosh, Shreenanda Lygouras, Chris Feng, Zili Fu, Mingxuan Nakatsuji, Satoru Drichko, Natalia Strongly Correlated Electrons Materials Science Weyl semimetals are characterized by an electronic structure with linearly dispersed nodes and distinguished chirality, protected by broken inversion or time reversal symmetry. The intercalated transition metal dichalcogenide V$_{1/3}$NbS$_2$ is proposed as a Weyl semimetal. In this study, we report polarization-resolved magnetic and electronic Raman scattering of this material, probing both the magnetic order and the electronic structure. The electronic scattering reveals a linear with frequency continuum of excitations, as the signature of electronic transitions within the proposed Weyl nodes in a two-dimensional electronic structure. Additionally, two-magnon excitations of V moments are observed near 15 meV in the magnetically ordered phase below 50 K. These excitations are well reproduced by calculations based on the Fleury-Loudon theory using spin wave exchange parameters derived from the neutron scattering data of this material and confirm the antiferromagnetic character of the order. These magnetic and electronic scattering, observed in the same spectra, provide independent spectroscopic evidence for a collinear antiferromagnetic Weyl semimetal state in V$_{1/3}$NbS$_2$. |
| title | Raman spectroscopic evidence for linearly dispersed nodes and magnetic ordering in the topological semimetal V$_{1/3}$NbS$_2$ |
| topic | Strongly Correlated Electrons Materials Science |
| url | https://arxiv.org/abs/2504.04590 |