Magic-angle Helical Trilayer Graphene

Overview

Journal Sci Adv

Specialties Biology
Science

Date 2023 Sep 6

PMID 37672575

Authors

Trithep Devakul

Patrick J Ledwith

Li-Qiao Xia

Aviram Uri

Sergio C de la Barrera

Pablo Jarillo-Herrero

Liang Fu

Affiliations

Soon will be listed here.

Abstract

We propose magic-angle helical trilayer graphene (HTG), a helical structure featuring identical rotation angles between three consecutive layers of graphene, as a unique and experimentally accessible platform for realizing exotic correlated topological states of matter. While nominally forming a supermoiré (or moiré-of-moiré) structure, we show that HTG locally relaxes into large regions of a periodic single-moiré structure realizing flat topological bands carrying nontrivial valley Chern number. These bands feature near-ideal quantum geometry and are isolated from remote bands by a very large energy gap, making HTG a promising platform for experimental realization of correlated topological states such as integer and fractional quantum anomalous Hall states.

Citing Articles

Robust flat bands in twisted trilayer graphene moiré quasicrystals.

Hao C, Zhan Z, Pantaleon P, He J, Zhao Y, Watanabe K Nat Commun. 2024; 15(1):8437.

PMID: 39349470 PMC: 11443009. DOI: 10.1038/s41467-024-52784-7.

Visualizing the moiré of moiré.

Ning H, Gedik N Nat Mater. 2024; 23(12):1606-1607.

PMID: 39284895 DOI: 10.1038/s41563-024-02003-x.

Twisto-Electrochemical Activity Volcanoes in Trilayer Graphene.

Babar M, Zhu Z, Kurchin R, Kaxiras E, Viswanathan V J Am Chem Soc. 2024; 146(23):16105-16111.

PMID: 38829312 PMC: 11177310. DOI: 10.1021/jacs.4c03464.

Unveiling the intricate moiré of moiré texture.

Luo R, Zhou W Nat Mater. 2024; 23(3):304-305.

PMID: 38438617 DOI: 10.1038/s41563-024-01805-3.

Fractional quantum anomalous Hall effect in multilayer graphene.

Lu Z, Han T, Yao Y, Reddy A, Yang J, Seo J Nature. 2024; 626(8000):759-764.

PMID: 38383622 DOI: 10.1038/s41586-023-07010-7.

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