Large positive magnetoconductance in carbon nanoscrolls
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arXiv
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| Main Authors: | , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| _version_ | 1866910897034756096 |
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| author | Zhong, Yu-Jie Li, Jia-Cheng Huang, Xuan-Fu Lee, Ying-Je Chen, Ting-Zhen Zhang, Jia-Ren Huang, Angus Hsu, Hsiu-Chuan Ortix, Carmine Chang, Ching-Hao |
| author_facet | Zhong, Yu-Jie Li, Jia-Cheng Huang, Xuan-Fu Lee, Ying-Je Chen, Ting-Zhen Zhang, Jia-Ren Huang, Angus Hsu, Hsiu-Chuan Ortix, Carmine Chang, Ching-Hao |
| contents | We theoretically demonstrate that carbon nanoscrolls -- spirally wrapped graphene layers with open endpoints -- can be characterized by a large positive magnetoconductance. We show that when a carbon nanoscroll is subject to an axial magnetic field of several Tesla, the ballistic conductance at low carrier densities of the nanoscroll has an increase of about 200%. Importantly, we find that this positive magnetoconductance is not only preserved in an imperfect nanoscroll (with disorder or mild inter-turn misalignment) but can even be enhanced in the presence of on-site disorder. We prove that the positive magnetoconductance comes about the emergence of magnetic field-induced zero energy modes, specific of rolled-up geometries. Our results establish curved graphene systems as a new material platform displaying sizable magnetoresistive phenomena. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2408_03518 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Large positive magnetoconductance in carbon nanoscrolls Zhong, Yu-Jie Li, Jia-Cheng Huang, Xuan-Fu Lee, Ying-Je Chen, Ting-Zhen Zhang, Jia-Ren Huang, Angus Hsu, Hsiu-Chuan Ortix, Carmine Chang, Ching-Hao Mesoscale and Nanoscale Physics Disordered Systems and Neural Networks Materials Science Quantum Physics We theoretically demonstrate that carbon nanoscrolls -- spirally wrapped graphene layers with open endpoints -- can be characterized by a large positive magnetoconductance. We show that when a carbon nanoscroll is subject to an axial magnetic field of several Tesla, the ballistic conductance at low carrier densities of the nanoscroll has an increase of about 200%. Importantly, we find that this positive magnetoconductance is not only preserved in an imperfect nanoscroll (with disorder or mild inter-turn misalignment) but can even be enhanced in the presence of on-site disorder. We prove that the positive magnetoconductance comes about the emergence of magnetic field-induced zero energy modes, specific of rolled-up geometries. Our results establish curved graphene systems as a new material platform displaying sizable magnetoresistive phenomena. |
| title | Large positive magnetoconductance in carbon nanoscrolls |
| topic | Mesoscale and Nanoscale Physics Disordered Systems and Neural Networks Materials Science Quantum Physics |
| url | https://arxiv.org/abs/2408.03518 |