Weyl Fermion Manipulation Through Magnetic Transitions in the Ferromagnetic Non‐Centrosymmetric Weyl Semimetal PrAlSi
Abstract PrAlSi, a non‐centrosymmetric ferromagnetic Weyl semimetal candidate with a Curie temperature of 17.8K, offers a unique platform for exploring the interplay of symmetry breaking and topological electronic structures. Up to now, the Weyl fermion distribution as well as their evolution across the ferromagnetic to paramagnetic phase transition in PrAlSi has not been explored. Here, the presence of Weyl fermions is uncovered in PrAlSi and demonstrates that they can be manipulated through the magnetic phase transition. The ab‐initio calculations indicate a shift in the momentum and energy positions of Weyl fermions, alongside an increase in Weyl point numbers due to band splitting. The predicted band splitting and shifting of Weyl fermions are corroborated by the angle‐resolved photoemission spectroscopy experiments. Such manipulation of Weyl fermions leads to the appearance of a net chirality charge and a significant modulation in optical conductivity, as proposed by the calculations. The research presents a novel method for adjusting the properties of Weyl semimetals by controlling Weyl fermions through magnetic phase transitions, positioning PrAlSi as a model system.
Authors
- Peijie Sun (ORCID: https://orcid.org/0000-0003-1504-5634)
- Enke Liu (ORCID: https://orcid.org/0000-0002-5498-993X)
- Defa Liu (ORCID: https://orcid.org/0000-0001-5199-6619)
- Xiaotian Yang (ORCID: https://orcid.org/0000-0002-6441-4769)
- Zhongkai Liu (ORCID: https://orcid.org/0000-0003-3373-8039)
- Yan Sun (ORCID: https://orcid.org/0000-0002-7142-8552)
- Wujun Shi (ORCID: https://orcid.org/0000-0003-4541-9086)
- Lexian Yang (ORCID: https://orcid.org/0000-0002-0078-1797)
- Weizheng Cao (ORCID: https://orcid.org/0000-0002-2386-4739)
- Kaipu Wang
- Mao Ye (ORCID: https://orcid.org/0000-0002-3298-4724)
- Yanpeng Qi (ORCID: https://orcid.org/0000-0003-2722-1375)
- Cheng Chen (ORCID: https://orcid.org/0000-0003-4857-409X)
- Haifeng Yang (ORCID: https://orcid.org/0000-0002-7479-913X)
- Cheng Peng (ORCID: https://orcid.org/0009-0006-3433-1467)
- Meng Lyu (ORCID: https://orcid.org/0000-0001-8940-3276)
- Yulin Chen (ORCID: https://orcid.org/0000-0002-5466-9936)
- Zheng-Yang Lv
Institutions
- Chinese Academy of Sciences (CN)
- Beijing Normal University (CN)
- ShanghaiTech University (CN)
- University of Oxford (GB)
- Shanghai Advanced Research Institute (CN)
- Shanghai Institute of Microsystem and Information Technology (CN)
- Institute of Physics (CN)
- Tsinghua University (CN)
Publication Details
- Journal
- Advanced Electronic Materials
- Published
- 2025-04-30
- DOI
- https://doi.org/10.1002/aelm.202500044
- Primary Topic
- Rare-earth and actinide compounds
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- National Natural Science Foundation of China
- Science and Technology Commission of Shanghai Municipality
- ShanghaiTech University