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    题名: Large Positive Magnetoconductance in Carbon Nanoscrolls
    作者: 許琇娟
    Hsu, Hsiu-Chuan;Zhong, Yu-Jie;Li, Jia-Cheng;Huang, Xuan-Fu;Lee, Ying-Je;Chen, Ting-Zhen;Zhang, Jia-Ren;Huang, Angus;Ortix, Carmine;Chang, Ching-Hao
    贡献者: 應物所
    关键词: radial superlattice;Aharonov-Bohm effect;interfacial magnetic states;longitudinal magnetic field
    日期: 2025-03
    上传时间: 2025-05-09 11:27:20 (UTC+8)
    摘要: We theoretically demonstrate that carbon nanoscrolls, spirally wrapped graphene layers with open end points, 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 increases by about 200%. Importantly, we find that this positive magnetoconductance is not only preserved in an imperfect nanoscroll (with disorder or mild interturn misalignment) but can even be enhanced in the presence of on-site disorder. We prove that the positive magnetoconductance comes about with the emergence of magnetic-field-induced zero-energy modes, specific to rolled-up geometries. Our results establish curved graphene systems as a new material platform displaying sizable magnetoresistive phenomena.
    關聯: Nano Letters, Vol.25, No.14, pp.5550-5556
    数据类型: article
    DOI 連結: https://doi.org/10.1021/acs.nanolett.4c03694
    DOI: 10.1021/acs.nanolett.4c03694
    显示于类别:[應用物理研究所 ] 期刊論文

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