Download file (2.58MB)
Download as zip (2.36MB)

コレクション

引用

説明:

Using a realistic model relevant to La2CuO4 and other altermagnetic perovskite oxides, we study interrelations between weak ferromagnetism (WF), anomalous Hall effect (AHE), and net orbital magnetization (OM). All of them can be linked to the form of Dzyaloshinskii-Moriya (DM) interactions. Nevertheless, while spin WF is induced by the DM vector components having the same sign in all equivalent bonds, AHE and OM are related to alternating-sign components, which do not contribute to any canting of spins. The microscopic model remains invariant under the symmetry operation combining the shift of antiferromagnetically coupled sublattices to each other with the spin flip. Thus, the band structure remains Kramers-degenerate, but the time-reversal symmetry is broken, providing a possibility to realize AHE in antiferromagnetic substances. The altermagnetic splitting of bands, breaking this symmetry, does not play a major role in the problem. More important is the orthorhombic strain, responsible for finite values of AHE and OM.

権利情報:

• Creative Commons BY-NC-ND Attribution-NonCommercial-NoDerivs 4.0 International
  

キーワード: altermagnetism, weak ferromagnetism, anomalous Hall effect, orbital magnetism

刊行年月日: 2026-05-22

出版者: Springer Science and Business Media LLC

掲載誌:

• npj Quantum Materials (ISSN: 23974648) vol. 11 issue. 1 54

研究助成金:

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.1038/s41535-026-00900-9

関連資料:

その他の識別子:

連絡先:

更新時刻: 2026-06-25 16:49:38 +0900

MDRでの公開時刻: 2026-06-25 18:29:53 +0900