Chirality‐Selected Noncollinear Antiferromagnetic State
The topological noncollinear antiferromagnet (AFM) Mn<sub>3</sub>Sn exhibits a giant anomalous Hall conductance (AHC) originating from its nonvanishing Berry curvature. Conventionally, the two AHC states are regarded as time-reversal pairs coupled to the magnetic octupole moment, and their control has relied on reversing this moment by external magnetic fields or electric currents. Here, an alternative mechanism is demonstrated-the chirality-selected noncollinear antiferromagnetic state-in which the AHC polarity is defined by the vector spin chirality (VSC) of the Kagome lattice. By constructing Mn<sub>3</sub>Sn/Pt heterostructures, a Fert-Levy-type Dzyaloshinskii-Moriya interaction (DMI) is introduced that sets the lattice chirality. The induced DMI changes the VSC from counterclockwise (CCW) to clockwise (CW), resulting in a corresponding inversion of the AHC sign. This behavior is confirmed by symmetry analysis and atomistic simulations that link the polarity inversion to the competition between DMI energy and intrinsic anisotropy. These findings establish a chirality-defined route for controlling noncollinear antiferromagnetic order and highlight DMI engineering as a powerful means of tailoring Berry-curvature-driven transport in AFMs.
Authors
- Meng Tang (ORCID: https://orcid.org/0000-0003-4398-3900)
- Shijie Xu (ORCID: https://orcid.org/0000-0003-2882-1065)
- Lixuan Tai (ORCID: https://orcid.org/0000-0001-5144-7337)
- Bingqian Dai (ORCID: https://orcid.org/0000-0001-9904-4078)
- Houyi Cheng (ORCID: https://orcid.org/0000-0002-0715-2125)
- Wenkai Lou (ORCID: https://orcid.org/0000-0001-6906-6479)
- Xixiang Zhang (ORCID: https://orcid.org/0000-0002-3478-6414)
- Zhizhong Zhang (ORCID: https://orcid.org/0000-0002-1634-7012)
- Kai Chang (ORCID: https://orcid.org/0000-0002-4609-8061)
- Yinchang Ma (ORCID: https://orcid.org/0000-0002-5201-6448)
- Yue Zhang (ORCID: https://orcid.org/0000-0001-6682-0093)
- Kang L. Wang (ORCID: https://orcid.org/0000-0002-9363-1279)
- Shuhan Sun (ORCID: https://orcid.org/0000-0001-6641-6197)
- Yi Ren (ORCID: https://orcid.org/0000-0002-0803-0824)
- Weisheng Zhao
Institutions
- Tongji University (CN)
- University of California, Los Angeles (US)
- Chinese Academy of Sciences (CN)
- Ministry of Education (IR)
- Zhejiang Lab (CN)
- Hefei Institute of Technology Innovation (CN)
- Institute of Semiconductors (CN)
- University of Chinese Academy of Sciences (CN)
- King Abdullah University of Science and Technology (SA)
- Beihang University (CN)
Publication Details
- Journal
- Advanced Materials
- Published
- 2025-12-06
- DOI
- https://doi.org/10.1002/adma.202516514
- Primary Topic
- Topological Materials and Phenomena
- Type
- article
- Field-Weighted Citation Impact
- 0.00