Synergistic correlated states and nontrivial topology in coupled graphene-insulator heterostructures

Xin Lu, Shihao Zhang, Yaning Wang, Xiang Gao, Kaining Yang, Zhongqing Guo, Yuchen Gao, Yu Ye, Zheng Han and Jianpeng Liu ()
Additional contact information
Xin Lu: ShanghaiTech University
Shihao Zhang: ShanghaiTech University
Yaning Wang: Chinese Academy of Sciences
Xiang Gao: Shanxi University
Kaining Yang: Shanxi University
Zhongqing Guo: ShanghaiTech University
Yuchen Gao: Collaborative Innovation Center of Quantum Matter
Yu Ye: Collaborative Innovation Center of Quantum Matter
Zheng Han: Shanxi University
Jianpeng Liu: ShanghaiTech University

Nature Communications, 2023, vol. 14, issue 1, 1-12

Abstract: Abstract Graphene has aroused great attention due to the intriguing properties associated with its low-energy Dirac Hamiltonian. When graphene is coupled with a correlated insulating substrate, electronic states that cannot be revealed in either individual layer may emerge in a synergistic manner. Here, we theoretically study the correlated and topological states in Coulomb-coupled and gate-tunable graphene-insulator heterostructures. By electrostatically aligning the electronic bands, charge carriers transferred between graphene and the insulator can yield a long-wavelength electronic crystal at the interface, exerting a superlattice Coulomb potential on graphene and generating topologically nontrivial subbands. This coupling can further boost electron-electron interaction effects in graphene, leading to a spontaneous bandgap formation at the Dirac point and interaction-enhanced Fermi velocity. Reciprocally, the electronic crystal at the interface is substantially stabilized with the help of cooperative interlayer Coulomb coupling. We propose a number of substrate candidates for graphene to experimentally demonstrate these effects.

Date: 2023
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.nature.com/articles/s41467-023-41293-8 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:14:y:2023:i:1:d:10.1038_s41467-023-41293-8

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

DOI: 10.1038/s41467-023-41293-8

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 ().