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説明:

Magnetic properties of materials ranging from conventional ferromagnetic metals to strongly correlated materials such as cuprates originate from Coulomb exchange interactions. The existence of alternate mechanisms for magnetism that could naturally facilitate electrical control have been discussed theoretically but an experimental demonstration in an extended system has been missing. Here, we investigate MoSe2/WS2 van der Waals heterostructures in the vicinity of Mott insulator states of electrons forming a frustrated triangular lattice and observe direct evidence for magnetic correlations originating from a kinetic mechanism. By directly measuring electronic magnetization through the strength of the polarization-selective attractive polaron resonance, we find that when the Mott state is electron doped the system exhibits ferromagnetic correlations in agreement with the Nagaoka mechanism.

権利情報:

• Creative Commons BY Attribution 4.0 International
  

キーワード: Magnetic properties, Coulomb exchange interactions, MoSe2/WS2 heterostructures

刊行年月日: 2023-11-16

出版者: Springer Science and Business Media LLC

掲載誌:

• Nature (ISSN: 00280836) vol. 623 issue. 7987 p. 509-513

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/s41586-023-06633-0

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更新時刻: 2025-02-23 22:48:13 +0900

MDRでの公開時刻: 2025-02-23 22:48:13 +0900