Antiferromagnetic structure of <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mrow> <mml:msub> <mml:mi>KV</mml:mi> <mml:mn>2</mml:mn> </mml:msub> <mml:msub> <mml:mi>Se</mml:mi> <mml:mn>2</mml:mn> </mml:msub> <mml:mi mathvariant="norma
Altermagnetism has been proposed as a distinct class of antiferromagnets exhibiting momentum-dependent spin splitting band structures without requiring spin-orbit coupling. Recently, ${\mathrm{KV}}_{2}{\mathrm{Se}}_{2}\mathrm{O}$ has been identified as a metallic room-temperature altermagnet with $d$-wave spin-momentum locking. Here, we investigate the magnetic structure of ${\mathrm{KV}}_{2}{\mathrm{Se}}_{2}\mathrm{O}$ in both polycrystalline and single-crystal samples using neutron diffraction techniques. The system exhibits G-type antiferromagnetic structure with a N\'eel temperature ${T}_{N}\ensuremath{\approx}$ 400 K. Notably, substantial broadening of magnetic peaks was observed along $L$ at low temperatures in single crystals, consistent with the coexistence of G-type AFM order and a $c$-axis spin density wave. These results demonstrate that bulk ${\mathrm{KV}}_{2}{\mathrm{Se}}_{2}\mathrm{O}$ cannot host altermagnetism.
Authors
- Silvia C. Capelli (ORCID: https://orcid.org/0000-0001-8765-7432)
- Kai Sun (ORCID: https://orcid.org/0000-0001-8423-950X)
- Xiaobai Ma (ORCID: https://orcid.org/0000-0002-6891-5536)
- Lunhua He (ORCID: https://orcid.org/0000-0002-0531-2148)
- Genfu Chen (ORCID: https://orcid.org/0000-0003-1859-3062)
- Jingwen Cheng
- Yili Sun (ORCID: https://orcid.org/0000-0002-0198-2734)
- Jinbo Yang (ORCID: https://orcid.org/0000-0003-3517-9701)
- M. Gutmann (ORCID: https://orcid.org/0000-0001-7737-3364)
- Jiazheng Hao
- Shiliang Li (ORCID: https://orcid.org/0000-0001-7922-3730)
- Shanshan Zhang (ORCID: https://orcid.org/0000-0003-1637-6486)
- Yu Huang (ORCID: https://orcid.org/0009-0008-9608-0020)
- Dongfeng Chen (ORCID: https://orcid.org/0000-0003-1263-2374)
- Z. Li (ORCID: https://orcid.org/0009-0009-2077-3805)
- Huiqian Luo (ORCID: https://orcid.org/0000-0003-1514-0041)
- Feiran Shen
- Wenyun Yang
Institutions
- Rutherford Appleton Laboratory (GB)
- China National Nuclear Corporation (CN)
- Chinese Academy of Sciences (CN)
- Peking University (CN)
- China Institute of Atomic Energy (CN)
- China Spallation Neutron Source (CN)
- FZU ‒ Institute of Physics of the Academy of Sciences of the Czech Republic (CZ)
- Institute of High Energy Physics (CN)
- Institute of Physics (CN)
- University of Chinese Academy of Sciences (CN)
- ISIS Neutron and Muon Source
- Spallation Neutron Source
Publication Details
- Journal
- Physical review. B./Physical review. B
- Published
- 2025-11-12
- DOI
- https://doi.org/10.1103/27n8-5q4l
- Citations
- 1
- Primary Topic
- Iron-based superconductors research
- Type
- article
- Field-Weighted Citation Impact
- 0.43