Gate control of 2D magnetism in tri- and four-layers $\rm CrI_3$/graphene heterostructures
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arXiv
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| Autori principali: | , , , , , , , , , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866911856847749120 |
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| author | Wang, Ping Lian, Fuzhuo Du, Renjun Cai, Xiaofan Bao, Song Han, Yaqing Xiao, Jingkuan Watanabe, Kenji Taniguchi, Takashi Wen, Jinsheng Yang, Hongxin Mayorov, Alexander S. Wang, Lei Yu, Geliang |
| author_facet | Wang, Ping Lian, Fuzhuo Du, Renjun Cai, Xiaofan Bao, Song Han, Yaqing Xiao, Jingkuan Watanabe, Kenji Taniguchi, Takashi Wen, Jinsheng Yang, Hongxin Mayorov, Alexander S. Wang, Lei Yu, Geliang |
| contents | We conduct experimental studies on the electrical transport properties of monolayer graphene directly covered by a few layers of $\rm CrI_3$. We do not observe the expected magnetic exchange coupling in the graphene but instead discover proximity effects featuring gate and magnetic field tunability. The tunability of gate voltage is manifested in the alignment of the lowest conduction band of $\rm CrI_3$ and the Fermi level of graphene, which can be controlled by the gate voltage. The coexistence of the normal and atypical quantum Hall effects in our device also corresponds to gate-control modulation doping. The lowest conduction band depends on the magnetic states of the $\rm CrI_3$ and can be altered by the magnetic field, which corresponds to the resistance loops during back-and-forth sweeps of the magnetic field. Our results serve as a reference for exploiting the magnetic proximity effects in graphene. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_18061 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Gate control of 2D magnetism in tri- and four-layers $\rm CrI_3$/graphene heterostructures Wang, Ping Lian, Fuzhuo Du, Renjun Cai, Xiaofan Bao, Song Han, Yaqing Xiao, Jingkuan Watanabe, Kenji Taniguchi, Takashi Wen, Jinsheng Yang, Hongxin Mayorov, Alexander S. Wang, Lei Yu, Geliang Mesoscale and Nanoscale Physics We conduct experimental studies on the electrical transport properties of monolayer graphene directly covered by a few layers of $\rm CrI_3$. We do not observe the expected magnetic exchange coupling in the graphene but instead discover proximity effects featuring gate and magnetic field tunability. The tunability of gate voltage is manifested in the alignment of the lowest conduction band of $\rm CrI_3$ and the Fermi level of graphene, which can be controlled by the gate voltage. The coexistence of the normal and atypical quantum Hall effects in our device also corresponds to gate-control modulation doping. The lowest conduction band depends on the magnetic states of the $\rm CrI_3$ and can be altered by the magnetic field, which corresponds to the resistance loops during back-and-forth sweeps of the magnetic field. Our results serve as a reference for exploiting the magnetic proximity effects in graphene. |
| title | Gate control of 2D magnetism in tri- and four-layers $\rm CrI_3$/graphene heterostructures |
| topic | Mesoscale and Nanoscale Physics |
| url | https://arxiv.org/abs/2404.18061 |