Electron-magnon coupling mediated magnetotransport in antiferromagnetic van der Waals heterostructures

Magnons --- wavelike spin excitations in magnets --- transfer energy and information without moving charge, like ripples on water. Here, the authors find that in FePS${}_{3}$, an antiferromagnetic insulator, magnons interact with the electrons of few-layer graphene when in a heterostructure, enabling spin waves to convert into electrical signals. In FePS${}_{3}$, magnons soften below 40 K, reducing stiffness with cooling, while few-layer graphene exhibits negative magnetoresistance at low fields (\ifmmode\pm\else\textpm\fi{}0.2 T) up to 100 K, transitioning to positive beyond this point. This experiment also proposes a ``magnon capacitor'', where spin waves regulate charge transport by influencing carrier dynamics at the interface. With possible applications in energy-efficient computing, this breakthrough advances next-generation spintronic technologies.

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Publication Details

Journal
Physical review. B./Physical review. B
Published
2025-04-16
DOI
https://doi.org/10.1103/physrevb.111.l140407
Citations
3
Primary Topic
2D Materials and Applications
Type
article
Field-Weighted Citation Impact
1.55

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Electron-magnon coupling mediated magnetotransport in antiferromagnetic van der Waals heterostructures

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Electron-magnon coupling mediated magnetotransport in antiferromagnetic van der Waals heterostructures

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Abstract

Magnons --- wavelike spin excitations in magnets --- transfer energy and information without moving charge, like ripples on water. Here, the authors find that in FePS${}_{3}$, an antiferromagnetic insulator, magnons interact with the electrons of few-layer graphene when in a heterostructure, enabling spin waves to convert into electrical signals. In FePS${}_{3}$, magnons soften below 40 K, reducing stiffness with cooling, while few-layer graphene exhibits negative magnetoresistance at low fields (\ifmmode\pm\else\textpm\fi{}0.2 T) up to 100 K, transitioning to positive beyond this point. This experiment also proposes a ``magnon capacitor'', where spin waves regulate charge transport by influencing carrier dynamics at the interface. With possible applications in energy-efficient computing, this breakthrough advances next-generation spintronic technologies.

Physical review. B./Physical review. BVol. 111(14)
Indian Association for the Cultivation of Science (IN), UGC DAE Consortium for Scientific Research (IN)
Department of Science and Technology, Ministry of Science and Technology, India, Science and Engineering Research Board
Openalex Percentile: Top 18%
2D Materials and Applications
1.55
DOISourceOpenAlex
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