Tuning the topological winding number by rolling up graphene

• URL: http://arxiv.org/abs/2501.12590v1
• Date: Wed, 22 Jan 2025 02:33:35 GMT
• Title: Tuning the topological winding number by rolling up graphene
• Authors: Ying-Je Lee, Yu-An Cheng, Yu-Jie Zhong, Ion Cosma Fulga, Ching-Hao Chang,
• Abstract summary: In this study, we theoretically demonstrate that the conductance can be precisely enhanced N times by rolling up graphene into an N-turn nanoscroll.<n>By integrating material geometry and topology, our work opens the door to artificially creating, customizing, and designing topological materials in rolled-up graphene-like systems.
• Score: 19.807159623826767
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Nanoscrolls, radial superlattices formed by rolling up a nanomembrane, exhibit distinct electronic and magneto-transport properties compared to their flat counterparts. In this study, we theoretically demonstrate that the conductance can be precisely enhanced N times by rolling up graphene into an N-turn nanoscroll and applying a longitudinal magnetic field. This tunable positive magnetoconductance stems from the topological winding number which is activated in a carbon nanoscroll with magnetic flux and its maximum value purely increases with the scroll winding number (the number of turns). By integrating material geometry and topology, our work opens the door to artificially creating, customizing, and designing topological materials in rolled-up graphene-like systems.

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