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| Title: | Large Positive Magnetoconductance in Carbon Nanoscrolls |
| Authors: | 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 |
| Contributors: | 應物所 |
| Keywords: | radial superlattice;Aharonov-Bohm effect;interfacial magnetic states;longitudinal magnetic field |
| Date: | 2025-03 |
| Issue Date: | 2025-05-09 11:27:20 (UTC+8) |
| Abstract: | 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. |
| Relation: | Nano Letters, Vol.25, No.14, pp.5550-5556 |
| Data Type: | article |
| DOI link: | https://doi.org/10.1021/acs.nanolett.4c03694 |
| DOI: | 10.1021/acs.nanolett.4c03694 |
| Appears in Collections: | [Graduate Institute of Applied Physics] Periodical Articles
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