Electron-Magnon Coupling Mediated Magnetotransport in Antiferromagnetic van der Waals Heterostructure
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arXiv
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| Main Authors: | , , , , , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866913577273655296 |
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| author | Maity, Sujan Das, Soumik Palit, Mainak Dey, Koushik Das, Bikash Kundu, Tanima Paramanik, Rahul De, Binoy Krishna Kunwar, Hemant Singh Datta, Subhadeep |
| author_facet | Maity, Sujan Das, Soumik Palit, Mainak Dey, Koushik Das, Bikash Kundu, Tanima Paramanik, Rahul De, Binoy Krishna Kunwar, Hemant Singh Datta, Subhadeep |
| contents | Electron-magnon coupling reveals key insights into the interfacial properties between non-magnetic metals and magnetic insulators, influencing charge transport and spin dynamics. Here, we present temperature-dependent Raman spectroscopy and magneto-transport measurements of few-layer graphene (FLG)/antiferromagnetic FePS\(_3\) heterostructures. The magnon mode in FePS\(_3\) softens below 40 K, and effective magnon stiffness decreases with cooling. Magnetotransport measurements show that FLG exhibits negative magnetoresistance (MR) in the heterostructure at low fields (\(\pm 0.2 \, \text{T}\)), persisting up to 100 K; beyond this, MR transitions to positive. Notably, as layer thickness decreases, the coupling strength at the interface reduces, leading to a suppression of negative MR. Additionally, magnetodielectric measurements in the FLG/FePS\(_3\)/FLG heterostructure show an upturn at temperatures significantly below ($T_\text{N}$), suggesting a role for the magnon mode in capacitance, as indicated by hybridization between magnon and phonon bands in pristine FePS\(_3\) \textit{via} magnetoelastic coupling. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2411_08597 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Electron-Magnon Coupling Mediated Magnetotransport in Antiferromagnetic van der Waals Heterostructure Maity, Sujan Das, Soumik Palit, Mainak Dey, Koushik Das, Bikash Kundu, Tanima Paramanik, Rahul De, Binoy Krishna Kunwar, Hemant Singh Datta, Subhadeep Mesoscale and Nanoscale Physics Materials Science Electron-magnon coupling reveals key insights into the interfacial properties between non-magnetic metals and magnetic insulators, influencing charge transport and spin dynamics. Here, we present temperature-dependent Raman spectroscopy and magneto-transport measurements of few-layer graphene (FLG)/antiferromagnetic FePS\(_3\) heterostructures. The magnon mode in FePS\(_3\) softens below 40 K, and effective magnon stiffness decreases with cooling. Magnetotransport measurements show that FLG exhibits negative magnetoresistance (MR) in the heterostructure at low fields (\(\pm 0.2 \, \text{T}\)), persisting up to 100 K; beyond this, MR transitions to positive. Notably, as layer thickness decreases, the coupling strength at the interface reduces, leading to a suppression of negative MR. Additionally, magnetodielectric measurements in the FLG/FePS\(_3\)/FLG heterostructure show an upturn at temperatures significantly below ($T_\text{N}$), suggesting a role for the magnon mode in capacitance, as indicated by hybridization between magnon and phonon bands in pristine FePS\(_3\) \textit{via} magnetoelastic coupling. |
| title | Electron-Magnon Coupling Mediated Magnetotransport in Antiferromagnetic van der Waals Heterostructure |
| topic | Mesoscale and Nanoscale Physics Materials Science |
| url | https://arxiv.org/abs/2411.08597 |