Large Positive Magnetoconductance in Carbon Nanoscrolls.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 40155199.
- Also identified by DOI 10.1021/acs.nanolett.4c03694 and PMC identifier 11987012.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
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.