Higher order gaps in the renormalized band structure of doubly aligned hBN/bilayer graphene moiré superlattice

Mohit Kumar Jat, Priya Tiwari, Robin Bajaj, Ishita Shitut, Shinjan Mandal, Kenji Watanabe, Takashi Taniguchi, H. R. Krishnamurthy, Manish Jain () and Aveek Bid ()
Additional contact information
Mohit Kumar Jat: Indian Institute of Science
Priya Tiwari: Department of Condensed Matter Physics, Weizmann Institute of Science
Robin Bajaj: Indian Institute of Science
Ishita Shitut: Indian Institute of Science
Shinjan Mandal: Indian Institute of Science
Kenji Watanabe: National Institute for Materials Science
Takashi Taniguchi: National Institute for Materials Science
H. R. Krishnamurthy: Indian Institute of Science
Manish Jain: Indian Institute of Science
Aveek Bid: Indian Institute of Science

Nature Communications, 2024, vol. 15, issue 1, 1-7

Abstract: Abstract This paper presents our findings on the recursive band gap engineering of chiral fermions in bilayer graphene doubly aligned with hBN. Using two interfering moiré potentials, we generate a supermoiré pattern that renormalizes the electronic bands of the pristine bilayer graphene, resulting in higher order fractal gaps even at very low energies. These Bragg gaps can be mapped using a unique linear combination of periodic areas within the system. To validate our findings, we use electronic transport measurements to identify the position of these gaps as a function of the carrier density. We establish their agreement with the predicted carrier densities and corresponding quantum numbers obtained using the continuum model. Our study provides strong evidence of the quantization of the momentum-space area of quasi-Brillouin zones in a minimally incommensurate lattice. It fills important gaps in the understanding of band structure engineering of Dirac fermions with a doubly periodic superlattice spinor potential.

Date: 2024
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

Downloads: (external link)
https://www.nature.com/articles/s41467-024-46672-3 Abstract (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-46672-3

Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/

DOI: 10.1038/s41467-024-46672-3

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().