Anisotropic linear magnetoresistance in nanoflakes of Dirac semimetal NiTe2
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arXiv
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| Autores principales: | , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| _version_ | 1866917130395451392 |
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| author | Zhou, Ding Bang Gao, Kuang Hong Lin, Tie Yang, Yang Zhao, Meng Fan Jia, Zhi Yan Hu, Xiao Xia Guo, Qian Jin Li, Zhi Qing |
| author_facet | Zhou, Ding Bang Gao, Kuang Hong Lin, Tie Yang, Yang Zhao, Meng Fan Jia, Zhi Yan Hu, Xiao Xia Guo, Qian Jin Li, Zhi Qing |
| contents | This work investigates the magneto-transport properties of exfoliated NiTe2 nano-flakes with varying thicknesses and disorder levels, unveiling two distinct physical mechanisms governing the observed anisotropic linear magnetoresistance (MR). For the perpendicular magnetic field configuration, the well-defined linear MR in high fields is unambiguously attributed to a classical origin. This conclusion is supported by the proportionality between the MR slope and the carrier mobility, and between the crossover field and the inverse of mobility. In stark contrast, the linear MR under parallel magnetic fields exhibits a non-classical character. It shows a pronounced enhancement with decreasing flake thickness, which correlates with an increasing hole-to-electron concentration ratio. This distinctive thickness dependence suggests an origin in the nonlinear band effects near the Dirac point, likely driven by the shift of the Fermi level. Furthermore, the strengthening of MR anisotropic with enhanced inter-layer transport contradicts the prediction of the guiding-center diffusion model for three-dimensional systems. Our findings highlight the critical roles of band topology and structural dimensional in the anomalous magneto-transport of Dirac semi-metals. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2510_00940 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Anisotropic linear magnetoresistance in nanoflakes of Dirac semimetal NiTe2 Zhou, Ding Bang Gao, Kuang Hong Lin, Tie Yang, Yang Zhao, Meng Fan Jia, Zhi Yan Hu, Xiao Xia Guo, Qian Jin Li, Zhi Qing Mesoscale and Nanoscale Physics This work investigates the magneto-transport properties of exfoliated NiTe2 nano-flakes with varying thicknesses and disorder levels, unveiling two distinct physical mechanisms governing the observed anisotropic linear magnetoresistance (MR). For the perpendicular magnetic field configuration, the well-defined linear MR in high fields is unambiguously attributed to a classical origin. This conclusion is supported by the proportionality between the MR slope and the carrier mobility, and between the crossover field and the inverse of mobility. In stark contrast, the linear MR under parallel magnetic fields exhibits a non-classical character. It shows a pronounced enhancement with decreasing flake thickness, which correlates with an increasing hole-to-electron concentration ratio. This distinctive thickness dependence suggests an origin in the nonlinear band effects near the Dirac point, likely driven by the shift of the Fermi level. Furthermore, the strengthening of MR anisotropic with enhanced inter-layer transport contradicts the prediction of the guiding-center diffusion model for three-dimensional systems. Our findings highlight the critical roles of band topology and structural dimensional in the anomalous magneto-transport of Dirac semi-metals. |
| title | Anisotropic linear magnetoresistance in nanoflakes of Dirac semimetal NiTe2 |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2510.00940 |