Giant magnetoresistance induced by spin-dependent orbital coupling in Fe3GeTe2/graphene heterostructures
Abstract Information technology has a great demand for magnetoresistance (MR) sensors with high sensitivity and wide-temperature-range operation. It is well known that space charge inhomogeneity in graphene (Gr) leads to finite MR in its pristine form, and can be enhanced by increasing the degree of...
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Nature Portfolio
2025-03-01
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| Series: | Nature Communications |
| Online Access: | https://doi.org/10.1038/s41467-025-58224-4 |
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| author | Shiming Huang Lianying Zhu Yongxin Zhao Kenji Watanabe Takashi Taniguchi Jie Xiao Le Wang Jiawei Mei Huolin Huang Feng Zhang Maoyuan Wang Deyi Fu Rong Zhang |
| author_facet | Shiming Huang Lianying Zhu Yongxin Zhao Kenji Watanabe Takashi Taniguchi Jie Xiao Le Wang Jiawei Mei Huolin Huang Feng Zhang Maoyuan Wang Deyi Fu Rong Zhang |
| author_sort | Shiming Huang |
| collection | DOAJ |
| description | Abstract Information technology has a great demand for magnetoresistance (MR) sensors with high sensitivity and wide-temperature-range operation. It is well known that space charge inhomogeneity in graphene (Gr) leads to finite MR in its pristine form, and can be enhanced by increasing the degree of spatial disorder. However, the enhanced MR usually diminishes drastically as the temperature decreases. Here, by stacking a van der Waals ferromagnet Fe3GeTe2 (FGT) on top of graphene to form an FGT/Gr heterostructure, we demonstrate a positive MR of up to ~9400% under a magnetic field of 9 T at room temperature (RT), an order of magnitude larger MR compared to pure graphene. More strikingly, the giant MR of the FGT/Gr heterostructure sustains over a wide temperature range from RT down to 4 K. Both control experiments and DFT calculations show that the enhanced MR originates from spin-dependent orbital coupling between FGT and graphene, which is temperature insensitive. Our results open a new route for realizing high-sensitivity and wide-temperature-range MR sensors. |
| format | Article |
| id | doaj-art-9732f18e348e4cbca80d1e7b28805421 |
| institution | DOAJ |
| issn | 2041-1723 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Nature Communications |
| spelling | doaj-art-9732f18e348e4cbca80d1e7b288054212025-08-20T02:49:27ZengNature PortfolioNature Communications2041-17232025-03-011611610.1038/s41467-025-58224-4Giant magnetoresistance induced by spin-dependent orbital coupling in Fe3GeTe2/graphene heterostructuresShiming Huang0Lianying Zhu1Yongxin Zhao2Kenji Watanabe3Takashi Taniguchi4Jie Xiao5Le Wang6Jiawei Mei7Huolin Huang8Feng Zhang9Maoyuan Wang10Deyi Fu11Rong Zhang12Department of Physics, Engineering Research Center for Micro-Nano Optoelectronic Materials and Devices of Ministry of Education, Fujian Provincial Key Laboratory of Semiconductor Materials and Applications, Xiamen UniversityDepartment of Physics, Engineering Research Center for Micro-Nano Optoelectronic Materials and Devices of Ministry of Education, Fujian Provincial Key Laboratory of Semiconductor Materials and Applications, Xiamen UniversityDepartment of Physics, Engineering Research Center for Micro-Nano Optoelectronic Materials and Devices of Ministry of Education, Fujian Provincial Key Laboratory of Semiconductor Materials and Applications, Xiamen UniversityNational Institute for Materials ScienceNational Institute for Materials ScienceDepartment of Physics, Southern University of Science and TechnologyShenzhen Institute for Quantum Science and Engineering, Southern University of Science and TechnologyDepartment of Physics, Southern University of Science and TechnologySchool of Optoelectronic Engineering and Instrumentation Science, Dalian University of TechnologyDepartment of Physics, Engineering Research Center for Micro-Nano Optoelectronic Materials and Devices of Ministry of Education, Fujian Provincial Key Laboratory of Semiconductor Materials and Applications, Xiamen UniversityDepartment of Physics, Engineering Research Center for Micro-Nano Optoelectronic Materials and Devices of Ministry of Education, Fujian Provincial Key Laboratory of Semiconductor Materials and Applications, Xiamen UniversityDepartment of Physics, Engineering Research Center for Micro-Nano Optoelectronic Materials and Devices of Ministry of Education, Fujian Provincial Key Laboratory of Semiconductor Materials and Applications, Xiamen UniversityDepartment of Physics, Engineering Research Center for Micro-Nano Optoelectronic Materials and Devices of Ministry of Education, Fujian Provincial Key Laboratory of Semiconductor Materials and Applications, Xiamen UniversityAbstract Information technology has a great demand for magnetoresistance (MR) sensors with high sensitivity and wide-temperature-range operation. It is well known that space charge inhomogeneity in graphene (Gr) leads to finite MR in its pristine form, and can be enhanced by increasing the degree of spatial disorder. However, the enhanced MR usually diminishes drastically as the temperature decreases. Here, by stacking a van der Waals ferromagnet Fe3GeTe2 (FGT) on top of graphene to form an FGT/Gr heterostructure, we demonstrate a positive MR of up to ~9400% under a magnetic field of 9 T at room temperature (RT), an order of magnitude larger MR compared to pure graphene. More strikingly, the giant MR of the FGT/Gr heterostructure sustains over a wide temperature range from RT down to 4 K. Both control experiments and DFT calculations show that the enhanced MR originates from spin-dependent orbital coupling between FGT and graphene, which is temperature insensitive. Our results open a new route for realizing high-sensitivity and wide-temperature-range MR sensors.https://doi.org/10.1038/s41467-025-58224-4 |
| spellingShingle | Shiming Huang Lianying Zhu Yongxin Zhao Kenji Watanabe Takashi Taniguchi Jie Xiao Le Wang Jiawei Mei Huolin Huang Feng Zhang Maoyuan Wang Deyi Fu Rong Zhang Giant magnetoresistance induced by spin-dependent orbital coupling in Fe3GeTe2/graphene heterostructures Nature Communications |
| title | Giant magnetoresistance induced by spin-dependent orbital coupling in Fe3GeTe2/graphene heterostructures |
| title_full | Giant magnetoresistance induced by spin-dependent orbital coupling in Fe3GeTe2/graphene heterostructures |
| title_fullStr | Giant magnetoresistance induced by spin-dependent orbital coupling in Fe3GeTe2/graphene heterostructures |
| title_full_unstemmed | Giant magnetoresistance induced by spin-dependent orbital coupling in Fe3GeTe2/graphene heterostructures |
| title_short | Giant magnetoresistance induced by spin-dependent orbital coupling in Fe3GeTe2/graphene heterostructures |
| title_sort | giant magnetoresistance induced by spin dependent orbital coupling in fe3gete2 graphene heterostructures |
| url | https://doi.org/10.1038/s41467-025-58224-4 |
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